Bibliography of Aeronautics

Year 1931

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The "Bibliography of Aeronautics" was written by Paul Brockett. This bibliography covers the international literature in the development of aeronautical science. Any book, journal, magazine or essay related to aviation was recorded in this great work. All pages from this famous bibliography are available as full text and as .pdf document, for free.



BIBLIOGRAPHY OF AERONAUTICS, 1931

By Paul Brockett

A

Aachen. Abhandlungen aus dem Aerodynamischen Institut an der Technischen Hochschule Aachen. Heft 9.

Berlin, Verlag Springer, 1930, pp. 63, ills.

- Abhandlungen aus dem Aerodynamischen Institut an der Technischen

Hochschule Aachen. Heft 10.

Berlin, Verlag Springer, 1931, pp. 68, ills.

Abbott, Ira H. Airship model tests in the variable density wind tunnel.

National Advisory Committee for Aeronautics, Report No. 394, Sept. 30, 1931, Washington, U.S. Government Printing Office, 1931, pp. 24, ills., diagrs., tabls.

- Experiments with an airfoil model on which the boundary layer is controlled without the use of supplementary equipment.

National Advisory Committee for Aeronautics, Technical Notes No. 371, April 14, 1931, Washington, April 1931, pp. 6, ill., diagrs.

Abit, Edmond. L'interaction des longerons dans les ailes cantilever.

L'Aéronautique, 13me année, No. 144, Bulletin L'Aérotechnique, 9e année, no. 101 (mai 1931), Paris, pp. 172-176, diagrs.

Abraham, Martin. Korrosionsversuche an Verspannungs-Drahtlitzen mit verschiedenartigen Endverbindungen.

Jahrbuch 1931 der Deutschen Versuchsanstalt fur Luftfahrt, E. V., München und Berlin, 1931, pp. 532-536, ills., tabls.

Abeams, Monte C. Air express possibilities in the United States. Aviation, Vol. 30, No. 12 (Dec. 1931), New York, pp. 686-688, ills.

Acceleration. See Coombes, L. P., and A. S. Crouch: The accelerations of a Fairey "Flycatcher" seaplane during aerobatic manœuvres.

- See Finn, E., and A. E. Woodward Nutt: Accelerations on aircraft during

manœuvres.

- See Glauert, H.: Some generalized curves for the accelerated motion of an

aeroplane.

Accidents. Accidents in civil aviation.

Aeroplane, Vol. 41, No. 19 (Nov. 4, 1931), London, pp. 1078-1082. Flight, No. 1193, Vol. 23, No. 45 (Nov. 6,1931), London, pp. 1112-1114.

- Aeroplane accidents in U.S.A. An analysis of the causes of accidents in

civil flying during the past three years.

Aircraft Engineering, Vol. 3, No. 30 (Aug. 1931), London, p. 194, tabls.

- Blessures causées par un avion roulant au sol.

L'Aérophile, 39e année. No. 5 (15 mai 1931), Paris, p. 153.

Accidents. See Drakensberg: The Drakensberg accident.

- See G-AAZK: Technical report by the accidents investigation subcommittee on the accident to the aeroplane G-AAZK at Meopham, Kent, on 21st July 1930.

- See Glendinning, W. G.: Possible cause of aircraft fires on crash. '

- See Great Britain: Report of the R. 101 inquiry. Presented by the

Secretary of State for Air to Parliament by command of His Majesty, March 1931.

- See Grey, Charles Grey: On errors of judgement.

- See H. H.: De eerste slachtoffers der luchtvaart.

- See Jones, Ernest: Half of air accidents avoidable?

- See Kühn, Fritz: Fire prevention on aircraft.

- See Meopham: The Meopham accident.

- See Meopham: On the Meopham accident.

- See Mount Batten: On the accident at Mount Batten.

- See Prochasson, Roger: Le risque de l'äir.

- See R 101: The loss of the airship R 101.

- See R. 101: Report of the R. 101.

- See R 101: R 101 Simon inquiry report. Disaster due to loss of gas.

- See R 101: The Simon report on R 101.

- See S. 64: Relazione finale della commissione d' inchiesta sail' incidents

dell'apparecchio S. 64.

- See Steele, Dudley: Searching from the air.

- See United States Department of Commerce: Aircraft accidents.

- See Weick, Fred E.: The behavior of conventional airplanes in situations

thought to lead to most crashes.

Ackeret, J. Kavitation (Hohlraumbildung).

Wien, W., und F. Harms: Handbuch der Experimentalphysik, Bd. 4,1. Teil. Hydro- und aerodynamik, Leipzig, Akademische Verlagsgesellschaft m.b.H., 1931, pp. 461-486, ills.

- See Larner, L., and J. Ackeret: Aeronautical education and reseaich at

the Swiss Institute of Technology in Zurich.

Acland, W. R. D. Deck flying.

Flight, No. 1153, 1154, Vol. 23, No. 5, 6 (Jan. 30, Feb. 6, 1931), London, pp. 102-103, 121-125, ills.

Journ. Roy. Aer. Soc, Vol. 35, No. 245 (May 1931), London, pp. 372-400, ills.

Adams, Harold Lamont. See Kirsten, Frederick Kurt, Harold Lamont Adams and Richard Lewis Stith: Venturi wind tunnel number 1.

Adie, A. M. The commercial importance of fog control.

Annals of the Association of American Geographers, Vol. 21,1931, pp. 91-100.

Adjudant-Vincenot. See Joux, fitienne Joseph Francois: Un dirigeable militaire: "L'Adjudant-Vincenot" (1911-1916).

Aéro-Club de France. See Ducout, Marcel-S.: Le rallye-parachutes de l'Aéro-club.

Aerodromes. See Airports.

Aerodynamics. Aerodynamics.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 16-27.

- See Abbott, Ira H.: Airship model tests in the variable density wind tunnel '

- See Anderson, Raymond, F.: The aerodynamic characteristics of three

tapered airfoils tested in the variable density wind tunnel.

- See Bamber, Millard J.: Wind tunnel tests on airfoil boundary layer control

using a backward-opening slot.

- See Bilbault, G.: Adaptation directe du groupe motopropulseur par la

méthode graphique à échelles logarithmiques.

- See Born, F.: Die Stellungslichter der Wasser- und Luftfahrzeuge.

- See Breguet, Louis: Aérotechnique.—Suspension aérodynamique du véhicule aérien.

- See Bryant, L. W., and D. H. Williams: The application of the method of

operators to the calculation of the disturbed motion of an aeroplane.

- See Crocco, Gaetano Arturo: Elementi di aviazione.

- See Curry, Manfield: Sails and aerodynamics.

- See Defoe, George L.: A comparison of the characteristics of three normal

and three reflexed airfoils in the variable density wind tunnel.

- See Desgrandschamps, R. G.: Calcul et construction des avions légers . . .

- See Ebert, Heinrich: Die DVL-Messnaben und ihre Verwendung beim

Flugversuch.

- See Eck, Bruno: Strömungslehre an hand von strömungsbildern; darstellung der wichtigsten Strömungsvorgänge aus der fiugtechnik und dem machinenbau mit 60 Strömungsaufnahmen.

- See Falkner, V. M., and Sylvia W. Skan: Some approximate solutions of

the boundary layer equations.

- See Green, J. J.: The viscous layer associated with a circular cylinder.

- See H.: Havens voor luchtschepen.

- See Helmbold, H. B.: Über Messflüge zur Bestimmung von Stirnwiderstandsfläche und Vortriebs Wirkungsgrad.

- See Hydrodynamics: Hydrodynamics and aerodynamics.

- See Johansen, F. C: Flow through pipe orifices at low Reynolds numbers.

- See Joukowski, N.: Aérodynamique.

- See Kirsten, Frederick Kurt, Harold Lamont Adams and Richard Lewis

Stith: Venturi wind tunnel number 1.

- See Knight, Montgomery, and Richard W. Noyes: Span-load distribution

as a factor in stability in roll.

Aerodynamics. See Koyemann, Alfred: Flugmechanische Beziehungen zwischen Flügge- schwindigkeit, Flugkosten und Flugweite und ihre Abhängigkeit von der widerstandsfläche des Flugzeuges.

- See Krell, O.: Druckverteilung an der luftumströmten Kugel.

- See Kruse, Helmuth: Untersuchung des Kurvenfluges.

- See Lafay, A.: Aérodynamique.—Sur les déviations, de la poussée du vent

sur un cylindre, produites par de très petits ressauts superficials.

- See Lapresle, A.: The aerodynamic wind vane and the inherent stability of

airplanes.

■- See Lapresle, A.: Le laboratoire d'aérodynamique.

- See Lock, C. N. H.: The equation of motion of a viscous fluid in tensor

notation.

- See Lötz, Irmgard: Berechnung der Auftriebsverteilung beliebig geformter

Flügel.

- See McCaffery, Richard Stanislaus, and Daniel Edward Krause: Air discharge of circular tuyeres.

- See Magnan, A., et A. Sainte-Lague: Aérodynamique.—Sur la distribution

des vitesses aérodynamiques autour d'un avion in vol.

- $ee Meunier, Emile Marie: Une nouvelle voie à l'avenir de l'aviation . . .

ouvrage posthume de Emile-Marie Meunier.

- See Monish, Byron Harold: Effect of variation of chord and span of ailerons

on hinge moments at several angles of pitch.

- See Münk, Max Michael: The center of pressure. Article eight on the

principles of aerodynamics.

- See Münk, Max Michael: The " M" wing sections. Article ten of the principles of aerodynamics.

- See Münk, Max Michael: Mathematical wing sections. Dr. Max M.

Munk's ninth article on the principles of aerodynamics.

--See National Physical Laboratory: National Physical Laboratory. Aerodynamics Department. Wind tunnel design. Fluid motion.

- See New York University: Technical notes of the Daniel Guggenheim

School of Aeronautics, College of Engineering, New York University, No. 1.

- See Olshevsky, Dimitry: A machine for automatic generation of airfoils.

- See Ower, E., and C. T. Hutton: Investigation of the boundary layers and

the drags of two streamline bodies.

- See Peters, H.: Einfluss der Zähigkeit bei Geschwindigkeitsmessungen mit

Staudruckmultiplikatoren. (Bruhnsche Venturi-Doppeldüse.)

- See Petersohn, E.: Abwindmessungen hinter Tragflügeln mit abgerissener

Strömung.

- See Piercy, N. A. V.: Aerodynamics for engineers. IV.—Elliptic loading—

channel corrections—downwash—viscous motion and boundary-layer theory. ' V.—Aeroplane performance in normal flight—other steady motions—ele-

ments of airscrew theory. VI.—An introduction to the study of aeroplane stability with a section on control.

Aerodynamics. See Pistolesi, E.: Correnti e azioni dinamiche a velocitä molto elevate.

- See Poggi, L.: Azioni aerodinamiche parallele al movimento su di un' ala

piana animata da moto traslatorio uniforme a da moto oscillatorio.

- See Poggi, L.: Sulla variazione de apportarsi ai resultati delle esperienze

eseguite al tunnel aerodynamico su di un modello alare.

- See Reif, E. F.: Aerodynamic research in 1930.

- See Rhode, Richard V., and Eugene E. Lundquist: Pressure distribution

over the fuselage of a PW-9 pursuit airplane in flight.

- See Rhode, Richard V.: The pressure distribution over the wings and tail

surfaces of a PW-9 pursuit airplane in flight.

- See Sails: The aerodynamics of sails.

- See Schilhansl, Max: Modellversuche zur Ermittlung des Leistungsbedarfs

für die künstliche Belüftung von Motorenprüfständen.

- See Schilhansl, Max: Versuche an einem Windkanaimodell.

- See Schmeidler, Werner: Untersuchungen über Flugzeuge mit veränderlichen Flächen.

- See Schmidt, Wilhelm: Beitrag zur Entwicklung eines autorotationsfreien

steil landbaren Flugzeuges.

- See Schrenk, Martin: Über das Zusammenwirken von Flugwerk und

Triebwerk.

- See Schutt, Karl: Einführung in die Physik des Fliegens.

- See Scott, Merit: The effect of the presence of a grid upon certain characteristics of the airflow at the surface of an airfoil.

- See Scott, Merit: The variation of the thermal boundary layer of a mina-

ture airfoil.

- See Seewald, Friedrich: Einige Probleme aus dem Arbeitsgebiet der

Aerodynamischen Abteilung der DVL.

- See Seewald, Friedrich: Flugversuche mit Messnaben zur Bestimmung der

aerodynamischen Eigenschaften der Luftfahrzeuge.

- See Serragli, G.: II moto di un molinello a pale orientabili posto in una

corrente variabile.

- See Soulö, Hartley Akin, and Nathan Frost Scudder: A method of flight

measurement of spins.

- See Southwell, R. V., and Letitia Chitty: On the problem of hydro-dynamic stability.—I. Uniform shearing motion in a viscous fluid.

- See Taylor, G. I.: The flow of air at high speeds past curved surfaces.

- See Teed, T. L.: Airships in horizontal flight. An examination of the

complicated forces that come into play when an airship is pitched.

Aerodynamics. See Theodorsen, Theodore: The theoretical pressure distribution on wing sections.

- See Tinaglia, Guglielmo: Aerodinamica.

- See Tinson, Clifford W.: Correction of aeroplane performance to standard

atmosphere (Density basis).

- See Trayer, George W., and H. W. March: Elastic instability of members

having sections common in aircraft construction.

- See Trojani, F.: Aviazone; lezioni tenute agli allievi piloti di aeroplano ,

1931.

- See United States Department of Commerce, Aeronautics Branch: Relative

lift distribution in any biplane. July 1, 1929.

- See Wenzinger, Carl Joseph: Pressure distribution over a thick, tapered

and twisted monoplane wing model—N.A.C.A. 81-J.

- See Whitlock, T. G.: Elementary applied aerodynamics.

- See Younger, John Elliott, and Baldwin M. Woods: Dynamics of airplanes

and airplane structures.

Aerodynamischen Institut an der Technischen Hochschule Aachen. See Aachen: Abhandlungen aus dem Aerodynamischen Institut an der Technischen Hochschule Aachen.

Aerology. See Maguire, Charles Joseph: Aerology; a ground school manual in aeronautical meteorology.

Aeronautical Chamber of Commerce. Aircraft Yearbook 1931. New York, D. Van Nostrand Co., 1931, pp. 607, Ills.

- See Berchtold, William E.: All for one—one for all. The accomplishments

of the Aeronautical Chamber of Commerce.

Aeronautical Research Committee. Aeronautical research. Report for 1930-31 published.

Flight, No. 1189,1190, Vol. 23, No. 41, 42 (Oct. 9,16,1931), London, pp. 1010-1012,1049-1050.

- Aeronautics. Technical Report of the Aeronautical Research Committee

for the year 1929-30, vol. I, Aerodynamics vol. II, Stability and control, spinning, materials, engines, etc.

London, His Majesty's Stationery Office, 1931, pp. x, 727, xi-xxiv, x, 729-1397, xi-xix, ills., diagrs., tabls.

- Collected reports on British high speed aircraft for the 1927 Schneider

Trophy contest.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, 1931, pp. 372, ills., diagrs., tabls.

- Reports and memoranda published between 1st September, 1929 and 31st

December, 1930.

Aer. Res. Comm., Rep. Mem., No. 1350, January 1931, London, 1931, pp. 8.

- See Glazebrook, Richard: Aeronautical research in England. A summary

of ten years' work directed by the Aeronautical Research Committee.

Aeropostale. The affaire aeropostale.

Aeroplane, Vol. 40, No. 10 (March 11, 1931) London, pp. 416, 418.

- On the world's longest airway. Parts I, II, and III.

Aeroplane, Vol. 40, Nos. 7,8, 9 (Feb. 18,25, and March 4,1931), London, pp. 321, 356, 358, 360, 362, ills.

Aeros. I fâgel perspektiv.

Flygning, Ârg. 9, N:R 1 (Jan. 1931), Stockholm, p. 2.

Africa. Air communications in Africa.

Aeroplane, Vol. 40, No. 5 (Feb. 4,1931), London, pp. 204, 206.

- Air transport development in Africa.

Flight, No. 1153, Vol. 23, No. 5 (Jan. 30, 1931), London, pp. 100-101, map.

- L'aviation marchande à travers l'Afrique.

L'Aéronautique, 13me année, No. 142 (Mars. 1931), Paris, p. 84, ill.

- The Cairo-to-Cape air mail route: The first link inaugurated.

Illustrated London News, Vol. 88, No. 2289 (March 7,1931), London, p. 379, ill.

- Down the all-red route.

Aeroplane, Vol. 40, No. 1 (Jan. 1931), London, pp. 28, 30, ills.

- Pioneering in East Africa.

Aeroplane, Vol. 40, No. 7 (Feb. 18, 1931), London, pp. 290, 292.

- The R.A.F. west African flight.

Flight, No. 1196, Vol. 23, No. 48 (Nov. 27, 1931), London, pp. 1167-1170, ills.

- Round Africa by light plane.

Flight, No. 1155, Vol. 23, No. 7 (Feb. 13,1931), London, p. 137, ill., map.

- The troubles of the African mail service.

Aeroplane, Vol. 40, No. 14 (April 8,1931), London, p. 627, ill.

- See Cobham, Alan: Twenty-thousand miles in a flying boat; my flight

round Africa.

-■ See Humphery, G. E. Woods: Air communications in Africa.

- See Marie, Eugène Armand: Le Congo à six jours de Paris.

- See Samson, Charles Rumney: A flight from Cairo to Cape Town and

back.

Ahrenberg, Albin. Bolivar, luftens vagabond. Stockholm, H. Schilt, 1931, pp. 160, ills.

- En solskensflygning Grönland-Island 1931.

Flygning, Ârg. 9, N:R 12 (Dec. 1931), Stockholm, pp. 239-241, ills.

Ailerons. See Clark, K. W.: The motions, at a stall, of a Bristol fighter aeroplane with slot and aileron control on both planes.

- See Control: Control by conventional ailerons. Results of a series of

wind-tunnel experiments carried out by the U.S. Bureau of Standards.

- See Hartshorn, A. S.: The application of the Servo principle to aileron

operation.

- See Hartshorn, A. S.: Theoretical relationship for a wing with unbalanced

ailerons.

—'— See Monish, Byron Harold: Effect of variation of chord and span of ailerons on hinge moments at several angles of pitch.

- See United States Department of Commerce. Aeronautics Branch:

Control of airplanes at low speeds by means of conventional ailerons. July 1, 1931.

Aimone-Cat, Mario. L'aviazione come strumento di offesa.

Atti della Società Italiana per il Progresso delle Science. Diciottesima riunnione, Firenze, 18-25 settembre 1929, Roma, Vol. 1, pp. 465-477.

Air. See Neumark, Stefan: Badanie wolnego spadku z uwzglednieniem oporu

powietrza o zmiennej g^stoéci. Air-cooled. See Nutt, A. E. Woodward, A. F. Scroggs, and E. Finn:

Range of aircraft with air-cooled radial engine using altitude control.

Air Corps. The Air Corps' mass migration.

Aviation, Vol. 30, No. 7 (July 1931), New York, pp. 398-403, ills.

- Plans for the Air Corps maneuvers.

Aviation, Vol. 30, No. 6 (June 1931), New York, pp. 339-341, ills.

- See United States Department of War: Report of Air Corps procurement

operations, fiscal year 1931. (Sec. 10 (m), 44 Stat. L. 787).

Aircraft manufacture. See Martin, Glenn L.: The development of aircraft manufacture.

Aircraft Yearbook. See Aeronautical Chamber of Commerce: Aircraft Yearbook 1931.

Air currents. See Lange, K. O.: Measurement of vertical air currents in the atmosphere.

Air estimates. See Great Britain: On the air estimates.

- Great Britain: On the air estimates again.

- See McAlery, C. M.: The debate on the air estimates.

Air flow. Seeing the spray.

Aeroplane, Vol. 41, No. 25 (Dec. 16, 1931), London, pp. 1380-1384, ills.

- See Hooker, S. G.: Compressibility effects in high-speed air flow.

- See Richardson, E. G.: Flow of air adjacent to the surface of a rotating

cylinder in a stream.

- See Tanaka, Keikiti: Air flow through exhaust valve of conical seat.

- See Townend, H. C. H.: On rendering airflow visible by means of hot wires.

- See Townend, H. C. H.: A study of slots, rings and jet control of the

boundary layer.

Airfoils. Il "Venturi" dà origine ad una nuova teoria dell'ala.

Riv. Aer., Anno 7, N. 7 (luglio 1931), Roma, pp. 129-131, ills.

- See Abbott, Ira H.: Experiments with an airfoil model on which the boundary layer is controlled without the use of supplementary equipment.

- See Anderson, Raymond F.: The aerodynamic characteristics of six commonly used airfoils over a large range of positive and negative angles of attack.

- See Anderson, Raymond F.: The aerodynamic characteristics of three

tapered airfoils tested in the variable density wind tunnel.

- See Bamber, Millard John: Wind tunnel tests on airfoil boundary layer

control using a backward-opening slot.

Airfoils. See Bonder, Juljan: Sur la construction des profils d'aviation.

- See Bradfield, F. B.: The effect on lift and drag of corrugating the surface

of an aerofoil.

- See Briggs, Lyman James, and H. L. Dryden: Aerodynamic characteristics

of circular-arc airfoils at high speeds.

- See Clark K. W., and B. Lockspeiser: Wind tunnel tests on aerofoils at

negative incidences.

- See Defoe, George L.: A comparison of the aerodynamic characteristics of

three normal and three reflexed airfoils in the variable density wind tunnel.

- See Fage, A., and V. M. Falkner: An experimental determination of the

intensity of friction on the surface of an aerofoil.

- See Fage, A., V. M. Falkner, and W. S. Walker: Experiments on a series

of symmetrical Joukowski sections.

- See Girault, Maurice: Méthode géométrique de tracés de profils d'ailes et

de corps fuselés. Essai sur la viscosité en mécanique des fluides.

- See Glauert, H.: The force and moment on an oscillating aerofoil.

- See Green, J. J.: Breakaway of boundary layer on a cylinder and an airfoil.

- See Haus, Fr.: Portances élevées et profils hypersustentateurs.

- See Jacobs, Eastman Nixon: The aerodynamic characteristics of eight very

thick airfoils from tests in the variable density wind tunnel.

- See Jacobs, Eastman Nixon, and Robert M. Pinkerton: Tests of N.A.C.A.

airfoils in the variable-density wind tunnel. Series 43 and 63.

- See Jacobs, Eastman Nixon: Tests of six symmetrical airfoils in the variable

density wind tunnel.

- See Munk, Max Michael: The measured lift of airfoils.

- See Neumark, Stefan: Sur les formes diverses du potential servant a

calculer les forces qui agissent sur les profils d'aviation.

- See Olshevsky, Dimitry: A machine for automatic generation of airfoils.

- See Perring, W. G. A.: Wind tunnel tests on a symmetrical aerofoil

(Gôttingen 429 section).

- See Pinkerton, Robert M.: Effect of nose shape on the characteristics of

symmetrical airfoils.

- See Raffaelli Italo: Profili alari seghettati.

- See Roy, Maurice: Contribution à la théorie des ailes sustentatrices;

caractéristiques des ailes monoplanes; moments de tangage et foyers.

- See Scott, Merit: The effect of the presence of a grid upon certain characteristics of the airflow at the surface of an airfoil.

- See Scott, Merit: The variation of the thermal boundary layer of a

miniature airfoil.

- See Stanton, T. E.: On the distribution of pressure over a symmetrical

Joukowski section at high speeds.

Airfoils. See Stanton, T. E.: Tests under conditions of infinite aspect ratio of 4 aerofoils in a high speed wind channel.

- See Tanner, T.: Movement of smoke in the boundary layer of an airofoil

without and with slot.

- See Tanner, T.: The two-dimensional flow of air around an aerofoil of

symmetrical section.

- See Ward, Kenneth E.: The effect of small variations in profile of airfoils.

- See Ward, Kenneth E.: The interference effects on an airfoil of flat plate

at mid-span position.

- See Wenzinger, Carl Joseph, and Joseph A. Shortal: The aerodynamic

characteristics of a slotted Clark Y wing as affected by the auxiliary airfoil position.

- See Williams, D. H., and A. S. Batson: Pressure distribution over a

yawed aerofoil, by D. H. Williams, with an appendix on rolling moments on a yawed aerofoil, by A. S. Batson.

- See Wings.

Air lines. New rules for air lines.

Western Flying, Vol. 10, No. 5 (Nov. 1931), Los Angeles, Cal., p. 36.

Air mail service. See Mail.

Airplane carriers. See Acland, W. R. D.: Deck flying.

Airports. Airport construction in 1930.

Aviation, Vol. 30, No. 1 (Jan. 1931), New York, pp. 31-33, ills., tabls.

- Airport operations and improvements.

Aviation, Vol. 30, No. 3 (March 1931), New York, pp. 158-160, diagr., tabls., maps.

- Getting to and from.

Airport Section, Western Flying, Vol. 9, No. 3 (March 1931), Los Angeles, Cal., pp. 85-86, ill.

- Municipal aerodromes in England. Information regarding existing

facilities and possibilities of suitable sites for factories.

Aircraft Engineering, Vol. 3, No. 28 (June 1931), London, p. 145, ill., map.

- Municipally-owned aerodromes.

Flight, No. 1151, Vol. 23, No. 3 (Jan. 16, 1931), London, pp. 57-58, ill.

- That fire hazard.

Airway Age, Vol. 13, No. 10 (Sept. 5,1931), New York, pp. 211-214.

- Zoning for airports.

Airport Section, Western Flying, Vol. 9, No. 2 (Feb. 1931), Los Angeles, Cal., pp. 83-84.

- See Arthur, William E.: Airport development.

- See Barnitz, Richard B.: The effect of airplane design on airports.

- See Barnitz, Richard B.: Gleaned from the Conference.

- See Barnitz, Richard B.: How the law can help airports.

- See Barnitz, Richard B.: Safety at airports.

- See Bigelow, A. A.: Airport growth in 1930-31.

Airports. See Blee, Harry H.: Protección de hangares de aeroplanos. Resumen del informe del comité de investigaciones sobre el control de hangares para aeroplanos por aplicación automática del agua.

- See Bouman, L. F.: De financieele zijde van het luchthavenbedrijf.

- See Buffalo: Developing the Buffalo municipal airport.

- See Canada: Notes on aerodrome development for airports, private and

intermediate, seaplane ports and seaplane anchorages in Canada.

- See Chicago: The brain of the airport.

- See Cooper, Mabel C: Airports of Mexico.

- See East Hartford: Rentschler field at East Hartford.

- See Ferris, E. M.: Creating a municipal port.

- See Francis, Roy N.: Economic airport operation.

- See Gray, B. E.: Surfacing the small airport.

- See Green, W. Sanger: A profitable airport.

- See H.: Havens voor luchtschepen.

- See Hawks, Frank: What kind of surface a pilot wants.

- See Haynes, H. Gene: Indianapolis municipal airport.

- See Johnson, Charles P.: Pittsburgh city-county airport.

- See Kjellson, Henry: Belysning av flyglinjer och flyghamnar.

- See Lake, Harley W.: Merchandising airport service.

- See Landing fields.

- See Lindbergh, H. A.: Minneapolis municipal airport.

- See Lippman, H. E.: Design of municipal airports.

- See Logan, Hub: Hospitality—Pueblo style.

- See Long, M. A.: Airports for seaboard cities.

- See Macdonald, Austin F.: Airport problems of American cities.

- See Mackall, K. W.: U.S. aerodrome lighting. Details and characteristics of the various types of aerodrome lights in current use.

- See Mockler, Don: What price airports?

- See New York: Municipal airport at New York.

- See New York: New York City dedicates its airport.

- See New York: Report of the fact-finding committee on suitable airport

facilities for the New York metropolitan district.

- See Niles, Alfred S.: West coast progress in 1930.

- See Pryor, Edwin W.: Wichita's municipal airport.

- See Rabbitt, P. J.: The second year at the airport for the Nation's Capital.

Airports. See Randolph, Ellen: "West Point of the air."

- See Ritchie, H. C: New airport lighting development.

- See Roosevelt field: Roosevelt field.

- See St. John, R. U.: A downtown airport.

- See Sexton, Russell W.: Lambert-St. Louis airport.

- See Sexton, Russell W.: Lambert-St. Louis municipal airport of 1931.

- See Shaw, B. Russell: Foresight in airport design.

- See Standard Oil Company of California: Landing fields of the Pacific

west.

- See Tulsa: Airport operators go into conference at Tulsa.

- See United States Congress. House Committee on Military Affairs: Increase flying-field area of Governors Island, N.Y. . . . Report to accompany H.R. 137.

- See United States Congress. House. Committee on Military Affairs:

Lease portions of Air Depot, Little Rock, Ark. . . . Report to accompany H.R. 15493.

- See United States Congress. Joint Commission on Airports: Airports,

National Capital.

- See United States Congress. Joint Commission on Airports: Recommending acquisition of airports . . . Report.

- See United States Congress. Senate. Committee on the District of

Columbia: Commercial airport for District of Columbia . . . Report to accompany S. 3901.

- See United States Congress. Senate. Committee on Naval Affairs:

Authorizing the Secretary of the Navy to accept a lighter-than-air base, and to construct necessary improvements thereon . . . Report to accompany H.R. 6810.

- See United States Department of Commerce. Aeronautics Branch: Airport design and construction. July 1, 1931.

- See United States Department of Commerce. Aeronautics Branch: Airport rating regulations. Effective as amended January 1, 1929.

- See United States Department of Commerce. Aeronautics Branch: Airport rating regulations. Effective as amended September 1, 1930.

- See United States Department of Commerce, Aeronautics Branch: Airports and landing fields. Revised January 1, 1931.

- See United States Department of Commerce. Aeronautics Branch:

Descriptions of airports and landing fields in the United States. September 1, 1931.

- See United States Department of Commerce, Aeronautics Branch: List

of airports and landing fields. Revised October 15, 1931.

- See United States Department of Commerce. Aeronautics Branch: Notes

on airport lighting. April 15, 1929.

Airports. See United States Department of Commerce, Aeronautics Branch: Report of committee on airport zoning and eminent domain [December 18, 1930].

- See Vancouver: Vancouver's airport.

- See Wagner, Sterling Robacher: The modern airport. A study in landscape engineering of the location, design, construction and management of airports, together with a suggested design for the municipal airport at Syracuse, N.Y.

- See Walsh, H. Vandervoort: Architectural principles applied to airport

design.

- See Wenneman, Joseph H.: Municipal airports: history, development

and legal aspect of municipal airports, text of federal acts and regulations, digests of state aviation laws and of the state enabling acts, ordinances of principal cities having airports on main airways, legal and business forms in use in the aviation industry.

- See York, Jack C: Birmingham, Alabama has new port.

- See Ziembinsky, M. S.: Principes d'établisement, d'aménagement agri-cole et hydraulique et d'entretien des terrains d'atterrissage.

Air propelled cars. See Rozendaal, John: Luchtschroefwagen tegen vliegtuig.

Air routes. See British Arctic Air Route Expedition: The British Arctic Air Route Expedition.

Air sacs. See Gunn, Donald L.: The function of the air sacs of insects.

Airscrews. See National Physical Laboratory: The National Physical Laboratory. Racing seaplanes and new aircraft. Airscrews. Thrust integrating tubes.

Air Service training limited. Preliminary prospectus of air service training limited.

pp. 23, 24-30 loose leaves.

Airships. Air as force to drive dirigible.

United States Daily, Friday, June 19, 1931, Washington, D.C., p. 2, ill.

- The airship service.

Engineering, Vol. 131, No. 3410 (May 22, 1932), London, pp. 675-676.

- The all-metal airship.

Flight, No. 1156, Vol. 23, No. 8 (Feb. 20, 1931), London, p. 157.

- An international airship scheme.

Aeroplane, Vol. 41, No. 25 (Dec. 16, 1931), London, p. 1356.

- The largest dirigible.

Aviation, Vol. 30, No. 10 (Oct. 1931), New York, pp. 599-600, ills.

- The last of our airships.

Aeroplane, Vol. 41, No. 20 (Nov. 1931), London, p. 1106.

- On the development of airships.

Aeroplane, Vol. 40, No. 20 (May 20, 1931), London, pp. 913-914, 916, 918, 920, ills.

- Our last airship. R. 100.

Aeroplane, Vol. 41, No. 21 (Nov. 18, 1931), London, p. 1168.

Airships. See Abbott, Ira H.: Airship model tests in the variable density wind tunnel.

- See Ajalbert, Jean: Le R-101 sur Beauvais, route des Indes; preface de

Lucien Laine\

- See Akron: El dirigible "Akron" de la marina Norte Americana.

- See Akron: The latest rigid airship. The Goody ear-Zeppelin Akron

built for the U.S. Navy fully described and illustrated.

- See Akron: The Navy Airship "Akron."

- See Akron: Navy's super-airship nears completion.

- See Akron: The United States rigid airship "Akron."

- See Allen, Hugh: The story of the airship.

- See Bird, W. G.: The influence of atmospheric humidity and other factors

upon the static lift of airships.

- See Breithaupt, a. D.: Methods of maintaining the equilibrium of airships.

- See Breithaupt, J.:Vorteile des Luftschiffs als Verkehrsmittel auf Groes-

stentfernungen.

- See Burgess, C. P.: Water-recovery apparatus for airships.

—■— See Chitty, Letitia, and R. V. Southwell: A contribution to the analysis of primary stresses in the hull of a rigid airship.

- See Dornier, Claude: Vorträge und abhandlungen aus dem gebiete des

flugzeugbaues und luftschiffbaues 1914-1930.

-■ See Fritche, Carl: The metalclad airship.

- See Fulton, Garland: Airship development.

- See Harriman, H. H.: U.S.S. Akron, world's largest airship; complete

pictures and the story of the dock, ship, airport, and " Lighter-than-air-center" of the world.

- See Hegener, Henri: De Akron. Het grootste luchtschip der wereld.

- See Jones, Bradley: The airship "Akron."

- See Jones, R., and A. H. Bell: Biplane fins on a model of R. 101.

- See K., A.: A sportsman's airship.

- See Klemperer, W.: Luftschiff-Messtechnik.

- See McAlery, CM.: The debate on airship policy.

- See Pitman, Ernest: A docking device for airships.

- See Rosendahl, Charles Emery: Up ship?

- See Rosenkranz, Jans: Ferdinand graf von Zeppelin; die geschichte eines

abenteuerlichen lebens.

- See Settle, T. G. W.: Some recent aspects of rigid airships.

- See Seydel, Edgar: Elasitizitätstheorie des starren Luftschiffs.

layer of an airship model.

- See Spanner, Edward Frank: The tragedy of "R 101."

- See Sprigg, Christopher: The airship, its design, history, operation and future.

- See Teed, P. L.: Gas fuel for airships. The manufacture of Blau Gas, with details of some possible alternatives.

- See Teed, T. L.: Airships in horizontal flight. An examination of the complicated forces that come into play when an airship is pitched.

- See Thompson, Floyd La Verne, and H. W. Kirschbaum: The drag characteristics of several airships determined by deceleration tests.

- See United States: The American naval airships.

- See Van Orman, Ward T.: A preliminary meteorological survey for airship bases on the middle Atlantic seaboard.

- See Watson, Wilbur Jay: Building the world's largest airship factory and dock; a complete description of this giant structure of the Goodyear-Zep-pelin Corporation at Akron, Ohio.

- See Williams, Blair: U.S.S. Akron.

- See Z.R.S. 4.: Essais des groupes moteurs du Z.R.S. 4 a Akron.

- See Ziolkowsky, Konstantin Eduardowitsch: Entwurf eines Ganz-Metall-

Luftschiffes fur 40 Fluggäste.

Air transport. See Langley, M:. Air transport. Towards Australia. The Dutch make a good start.

Airways. The federal airways project.

Western Flying Vol. 9, No. 1 (Jan. 1931), Los Angeles, Calif., p. 74.

- See Germany Berlin-Hannover-Westgrenze, Luftfahrtfeuer.

- See Germany: Hilfslandeplätze auf Nachtflugstrecken.

- See Kear, Frank Gregg., and Gerald Hiles Wintermute: A simultaneous radio-telephone and visual range beacon for the airways.

- See Lighting: Ground lighting equipment . The fundamental considerations and detailed design of lights for airway and aerodrome use.

- See Martin, Harald: Varldens langsta luftfartslinje.

- See Nixon, Laurence A.: Airline rates and routes. Vols. 1-2; Oct. 1919-July 1930.

- See United States Department of Commerce. Aeronautics Branch: Airway strip map list . . .

- See United States Department of Commerce. Aeronautics Branch: General airway information. September 1, 1931.

- See United States Department of Commerce. Aeronautics Branch: List of air navigation charts. October 15, 1929.

Airships. See Silvestri, Armando: L'ultimo dirigibile italiano.

- See Simmons, L. F. G.: Experiments relating to the flow in the boundary

Air wheels. See Peck, William Cecil, and Albert P. Beard; Static, drop, and flight tests on Musselman type airwheels.

Airworthiness. Amended airworthiness requirements. Effective January 1. Aero Digest, Vol. 18, No. 2 (Feb. 1931), New York, pp. 76, 78, 80.

- See Budwig, Gilbert: Airworthiness requirements for certificate for export.

Ajalbert, Jean. Le R-101 sur Beauvais, route des Indes; preface de Lucien Laine".

Paris, Les Editions des Portiques, 1931, pp. 77, ills., maps.

Ajmone-Cat, Mario. Insegnamenti od impressioni di un'aerocrociera? Riv. Aer., Anno 7, N. 4 (aprile 1931), Roma, pp. 1-8.

Akron. A cook stove for the Akron.

Western Flying, Vol. 10, No. 5 (Nov. 1931), Los Angeles, Calif., p. 33.

- El dirigible "Akron" de la marina Norte Americana.

Iberiea, Ano 18, Num. 901 (7 nov. 1931), Barcelona, pp. 273, 276-278, ill.

- A glimpse at the Akron.

Western Flying, Vol. 10, No. 3 (Sept. 1931), Los Angeles, Calif., p, 17.

- The latest rigid airship. The Goodyear-Zeppelin Akron built for the

U.S. Navy fully described and illustrated.

Aircraft Engineering, Vol. 3, No. 33 (Nov. 1931), London, pp. 271-273, ills.

- Launch of the U.S. Airship "Akron".

Flight, No. 1181, Vol. 23, No. 33 (Aug. 14, 1931), London, p. 822.

- The Navy airship "Akron."

Aero Digest, Vol. 19, No. 3 (Sept. 1931), New York, pp. 52-55, ills.

- Navy Zeppelin transmission system tested.

Aero Digest, Vol. 18, No. 1 (Jan. 1931), New York, p. 60, ill.

- Navy's super-airship nears completion.

Scient. Amer., Vol. 144, No. 5 (May 1931), New York, pp. 296-300, ills.

- Shock absorbers in the Akron.

Western Flying, Vol. 10, No. 6 (Dec. 1931), Los Angeles, Calif., p. 21.

- The "U.S.S. Akron" is christened by Mrs. Hoover.

U.S. Air Services, Vol. 16, No. 9 (Sept. 1931), Washington, pp. 25-28, ills.

- The United States rigid airship "Akron."

Engineering, Vol. 132, No. 3423 (Aug. 21,1931), London, pp. 215-218, 230, ills.

- See Airships: The largest dirigible.

- See Harriman, H.H.: U.S.S. Akron, world's largest airship; complete pictures and the story of the dock, ship, airport, and " Lighter-than-air-center" of the world.

- See Hegener, Henri: De Akron. Het grootste luchtschip der wereld.

- See K. A.: Trial nights of the "Akron."

- See Klein, Israel: How the Navy's giant airship will go to battle in time of war.

- See United States Navy: The U.S. Navy airship "Akron."

- See Williams, Blair: U.S.S. Akron.

Alaska. See Hayes, Robert: Alaska-Washington.

Alayrac, Antoine Charles. Étude des écoulements irrotationnels dans l'espace à trois dimensions.

Paris, E. Blondel La Rougery, 1931, pp. 47, diagrs.

Albatros. Das Langstrecken-Verkersflugzeug Albatros L 83 "Adler." Luftschau, 4. Jahrg., Nr. 12 (24. Juni 1931), Berlin, pp. 93-94, ills.

Albright, Horace M. Skyroads to our national parks.

Nat. Aer. Mag., Vol. 9, No. 2 (Feb. 1931), Washington, pp. 36, 45-46, ills.

Albuquerque. See Logan, Hub: Hospitality—Pueblo style.

Alfa Romeo. Le perfette costruzioni motoristiche per l'aviazione dell'Alfa Romeo.

L'Ala d'ltalia, Vol. 10, No. 5 (maggio 1931), pp. 347-349, ills.

Allard, Emile. Cours d'aéronautique. Paris, Dunod, 1931, pp. 318, ill.

Allard, John S. American airplanes in the Latin-American republics. Aero Digest, Vol. 18, Nol 4 (April 131), New York, pp. 38, 230, ills.

Allen, B. S. A flying visit to Italy. The Breda works.

Flight, No. 1186, Vol. 23, No. 38 (Sept. 18, 1931), London, pp. 951-952, ills.

Allen, C. B. Aerial police of New York City.

Aero Digest, Vol. 18, No. 3 (March 1931), New York, pp. 42-43,142-144, ills.

- The airline attendant's job.

Aviation, Vol. 30, No. 4 (April 1931), New York, pp. 244-245, ills.

- Curtiss moves to Buffalo.

Aero Digest, Vol. 18, No. 5 (May 1931), New York, pp. 54-55, ills.

Allen, Hugh. The story of the airship.

Akron, O., Commercial Printing and Lithographing Co., 1931, 6th edition, pp. 71, ills., map, 7th edition, pp. 84, ills.

Allen, William M. Limitations of liability to passengers by air carriers. Journal of Air Law, Vol. 2, No. 3 (July 1931), Chicago, pp. 325-334.

Allied and associated powers. Protocol amending articles 34 and 40 of the Convention for the Regulation of Aerial Navigation of October 13, 1919. Paris, December 11, 1929. Irish ratification on April 9, 1930.

Dublin, Stationery Office, 1931, pp. 4. Irish Free State. Treaty series 1930, No. 17.

Alloys. Alloys.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 49-52.

- The lightest alloy.

Aeroplane, Vol. 40, No. 13 (April 1, 1931), London, pp. 575-576.

- A new light alloy.

Aircraft Engineer, Flight Engineering Section, Suppl. to No. 1200, Vol. 23, No. 52 (Dec. 25, 1931), London, pp. 1264e-1264f, 93-94.

- Über die Herstellung und die mechanischen Eigenschaften der Al-Cu-Si

Legierungen.

Report of the Aeronautical Research Institute, Tôkyô Imperial University, No. 73 (Vol. 6, 7), (Oct. 1931), Tôkyô, pp. 141-217.

The article in Japanese is by Massaharu Goto, Sin-ichi Fukuta, Sadao Horiguchi, and Tannji Nagal.

Alloys. See Archbutt, S. L., an J. W. Jenkin: Mechanical properties of pure magnesium and certain magnesium alloys in the wrought condition—(continued) .

- See Decherf, E.: Leforeage et le matricage des alliages légers et ultralégers.

- See Gallo, G., e G. Fragapane: Leghe alluminio-cromo.

- See Grogan, J. D., and T. H. Schofîeld: Report on some properties of

alloys of aluminium with thorium and silicon.

- See Russell, H. W., and W. A. Welcker, Jr.: Endurance and other properties at low temperatures of some alloys for aircraft use.

- See Tapsell, H. J., S. L. Archbutt, and J. W. Jenkin: Alloys sub-committee.

Aeronautical Research Committee. Mechnical properties of pure magnesium and certain magnesium alloys in the wrought condition (continued). Mechanical properties of an "Electron" alloy.

Alston, R. P. Maximum lift coefficient of "Starling" with Clark YH wings.

Aeronautics, Techn. Rep. Aer. Res. Comm. 1929-1930, Vol. 1, London, 1931, pp. 297-298, diagrs. Rep. Mem. No. 1295 (Ae. 444.)

- Stalled flight tests on a Bristol fighter fitted with auto control slots and

interceptors.

Aer. Res. Comm., Rep. Mem. No. 1338 (Ae. 469), June 1930, London, 1931, pp. 3, ill., diagr.

- See Jones, E. T., and R. P. Alston: Longitudinal control and stability when

stalled.

Althin, Torsten. Flygkrönika; bilder och notitser ur luftfartens historia. Stockholm, Wahlström & Widstrand, 1931, pp. 61, ills.

Altimeter. See Ramsey, Logan C: The pilot and his altimeter.

Altitude. Altitude flights.

Western Flying, Vol. 10, No. 1 (July 1931), Los Angeles, Calif., p. 37.

- See Gutkowski, Tadeusz: Pomiar wysokoéci samolotöw przy starcie (opis

aparatöw).

- See Hendrickson, H. B.: Altitude flights.

- See Hendrickson, H. B.: More altitude flights.

- See Jennings, W. G.: Variation of power with height. Power factor in

relation to international standard atmosphere, with a method of reduction.

- See Jones, Bradley: How high is up? or some remarks on altitude measurements.

- See Làmari, Vittorio: Sul mal degli aviatori ...

- See Macready, John R.: Way way up!

- See Mokrzycki, Andrzej: Pewne zagadnienie lotu na wysokoéd.

-- See Stewart, C. J.: High altitude flying.

Altitude control. See Nutt, A. E. Woodward, A. F. Scroggs, and E. Finn: Range of aircraft with air-cooled radial engine using altitude control.

Altitude meter, See Braun: The Braun relative altitude meter.

Aluminum. La protection des alliages d'aluminium et Palclad.

L'Aéronautique, 13me année, No. 140 (jan. 1931), Paris, pp. 32-33, ills.

- See Bossert, T. W.: Aluminum and its alloys in aircraft..

- See Buzzard, R. W., and W. H. Mutchler: Advantages of oxide films as

bases for aluminum pigmented surface coating for aluminum alloys.

Aluminum alloys. See Rosenhain, W., J. D. Grogan, and T. H. Schofield: Gas removal and grain refinement in aluminum alloys.

- See Rosenhain, W., J. D. Grogan, and T. H. Schofield: The influence of

Titanium Tetrachloride on cast aluminium alloys.

Amarillo, Tex. See Helium: Helium plant celebrates first birthday.

Amateurs. Practical flying for amateurs.

London, Pub. for the proprietors of Shell by Simkin Marshal], Ltd., 1931, pp. 165, ills.

Ambrosini, Antonio. Degli impianti a terra necessari alla navigazione aerea (infrastruttura: aerodromi, aeroporti, campi di fortuna ed altri impianti accessori).

Riv. Aer., Anno 7, N. 5 (mag. 1931), Roma, pp. 235-252.

- Responsabilità aeronautica (caratteristiche fondamentali).

Roma, Società Anonima Editrice "Usila", 1930, pp. 141.

Ambulance. See Karsten, A.: Flugzeuge fuer den Krankendienst.

America. See Blee, Harry H.: The development of air transportation in America.

American Academy of Air Law. Announcing the American Academy of Air Law, Washington Square East, New York, New York. A national organization with a national program.

[New York, American Academy of Air Law, 1931, pp. 15.]

American Bar Association. Report of the standing committee on aeronautical law.

Presented at the meeting held at Atlantic City, N.J., September 17,18,19,1931. pp. 22.

American Clipper. Mrs. Hoover christens the "American clipper".

U.S. Air Services, Vol. 16, No. 11 (Nov. 1931), Washington, D.C., p. 16-17, ill.

American Society for Testing Materials. Symposium on aircraft materials, held at the thirty-third annual meeting of the American Society for Testing Materials, Atlantic City, N.J., June 23 to 27, 1930. Introduction by H. C. Knerr.

Philadelphia, 1930. pp. 192.

Reprint from Proceedings of the American Society for Testing Materials, Vol. 30, Pt. II, 1930.

American Society of Mechanical Engineers. Airplane instrument vibration.

Report and Papers Research Committees 1931, American Society Mechanical Engineers Research Publication, New York, Dec. 1931, pp. 105-109.

- The A.S.M.E. discusses aeronautics.

Aviation, Vol. 30, No. 7 (July 1931), New York, pp. 421-424, ills., diagrs., tabls.

- Progress in aeronautics. Contributed by the Aeronautics Division.

Mechanical Engineering, Vol. 53, No. 1 (Jan. 1931), New York, pp. 5-7.

Ames, George C. The airplane colony.

New York, Hydra Book Corporation,[l931,1 vol.

Ames, Joseph Sweetman. Glancing back at 1930. Scientific progress. Western Flying, Vol. 9, No. 1 (Jan. 1931), Los Angeles, Calif., pp. 40-41.

Amiot. The Amiot 140 M military airplane (French). An all-metal multiplace high-wing monoplane.

National Advisory Committee for Aeronautics, Aircraft Circulars No. 134, Feb. 13, 1931, Washington, February 1931, pp. 7, ills.

Amfhibian. A diminutive amphibian.

Flight, No. 1163 Vol. 23, No. 15 (April 10, 1931), London, pp. 310-311, ills.

- See K., A.: The world's largest amphibian.

- See Mounier, P. J. J.: Igor Sikorsky en zijn amphibie-vliegtuigen.

- See Heinkel: Heinkel amphibion.

- See Klemin, Alexander: Sikorsky's contribution to huge amphibions—the

S-40.

- See Sikorsky: The Sikorsky S-40 amphibion.

Amsterdam. De Rijks-Studiedienst voor de Luchtvaart, Amsterdam. Verslag over het jaar 1930.

's-Gravenhage Algemeene Landsdrukkerij, 1931, pp. 22.

- See Beekman, W.: In één week van Batavia naar Amsterdam.

Anderson, C. Rivers. Aeronautics in the Argentine.

Flight, No. 1159, Vol. 23, No. 11 (March 13,1931), London, p. 225.

Anderson, Ratmond F. The aerodynamic characteristics of six commonly used airfoils over a large range of positive and negative angles of attack.

National Advisory Committee for Aeronautics, Technical Notes No. 397, Nov. 3,1931, Washington, November 1931, pp. 5, diagrs., tabl.

- The aerodynamic characteristics of three tapered airfoils tested in the

variable density wind tunnel.

National Advisory Committee for Aeronautics, Technical Notes No. 367, Feb. 28,1931, Washington, February 1931, pp. 12, ill., diagrs., tabls.

- See Diehl, W. S., and R. F. Anderson: Variable density wind tunnel test

data on models of the Hawker Hornbill aeroplane and the AD-1 aerofoil section.

Anderson, S. Herbert. Fog penetration.

U.S. Air Services, Vol. 16, No. 7 (July 1931), Washington, pp. 20, 22-25, diagrs.

Andes. See Steven, A. W.: Flying the "Hump" of the Andes.

Andrée. De pooltocht van Andrée.

Het Vliegveld, 15de Jaarg., No. 1 (Jan. 1931), Amsterdam, pp. 19-24, ills.

Andrée, Salomon August. Ai margini délia storia. Andrée.

Riv. Aer., Anno 7, N. 1 (gen. 1931), Roma, pp. 203-217, ills., port.

- Dem Pol entgegen.

Leipzig, F. A. Brockhaus, 1930, pp. 278, ills.

Herausgegeben von der Schwed. Ges. f. Anthropologie und Geographie.

- See Schaff er, Ernst: Glück ab; bahnbrecher der lüfte.

Andreoli, G. A. Giulio. Azione d'impennaggio ed effeti d'elica.

Notiziario Teenico di Aeronautica, Vol. 6, No. 12 (die. 1930), pp. 219-234.

Andrews, W. R. Air-cooled engine power and weight.

Aircraft Engineer, Flight Engineering Section, Suppl. to No. 1178, Vol. 23, No. 30 (July 24, 1931), London, pp. 726a-726c (49-51), tabl.

Andrews, W. R. Gliders and gliding.

Flight, No. 1174, Vol. 23, No. 26 (June 26, 1931), London, pp. 612-614, diagrs.

Andriani, Oronzo. Lubrificazione appropriata dei motori d'aviazione a caratteristiche dei lubrificanti.

Riv. Aer., Anno 7, N. 3 (marzo 1931), Roma, pp. 458-466.

Animal flight. See Taverne, Gaspard Louis: Aviation naturelle; études sur la mécanique animale en vue d'applications aux machines locomotrices et spécialement à l'aéroplane; préface de M. E. Bourdelle.

Annuals. See Hirschauer, L., et Charles Dollfus: L'année aéronautique 1930-1931.

- See Italy: Annuario 1931.

Annunzio, Gabriele. See Mendoza, Saverio Laredo de: Gabriele d'Annunzio aviatore di guerra.

Antarctic. See Baichen, Bernt: Aviation lessons of the Antarctic.

- See Byrd, Richard Evelyn: Little America: Aerial exploration in the

Antarctic and the flight to the South Pole.

Antenna. See Eisner, Fr., G. Sudeck, Rudi Schröer, und O. Zinke: Vergrösserung der effektiven Höhe von Flugzeugschleppantennen.

Anti-aircraft matériel. See Wells, G. M.: Development of anti-aircraft matériel.

Antimony. See Gough, H. J., and H. L. Cox: The behaviour of a single crystal of antimony subjected to alternating torsional stresses.

Anxionnaz, René. Stabilisateur. Brevet français, n. 165,203, déposé le 20 octobre 1922 par M. René Anxionnaz.

L'Aéiophile, 39e année, No. 1 (15 jan. 1931), Paris, pp. 23, ill.

States that this invention is on the same principle as the one described as new in L'Aérophile. 15 octobre 1930, by C. H. Vances.

Ape. See Scott-Hall, S.: Experiments on an Ape aeroplane fitted with pilot planes.

Apostal, Aleksandr. See Zhukovskïï, Nikolaï Egorovich: Théorie tourbil-lonnaire de l'hélice propulsive, traduit du russe par A. Apostal . . . revu et annoté par W. Wettchinkine . . . Préface de W. Margoulis.

Appel, Wm. D., and R. K. Worner. An investigation of cotton for parachute cloth.

National Advisory Committee for Aeronautics. Technical Notes No. 393, Sept. 29, 1931, Washington, September 1931, pp. 21, tabls.

Archaeology. See Judd, Neil M.: The airplane aids the archaeologist in reconstructing an ancient civilization.

Archbutt, S. L., and J. W. Jenkin. Mechanical properties of pure magnesium and certain magnesium alloys in the wrought condition—(continued).

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 1033-1048, ills., tabls. Rep. Mem. No. 1287. (M.67.)

Archbutt, S. L. See Tapsell, H. J., S. L. Archbutt, and J. W. Jenkin: Alloys sub-committee. Aernautical Research Committee. Mechanical properties of pure magnesium and certain magnesium alloys in the wrought condition (continued). Mechanical properties of an "Electron" alloy.

Architecture. See Walsh, H. Vandervoort: Architectural principles applied to airport design.

Arctic. See British Arctic Air Route Expedition: The British Arctic Air Route Expedition.

- See Graf Zeppelin: The Zeppelin arctic expedition.

- See Montagnes, James: The Arctic air mail.

- See Montagnes, James: Plane parking in the Arctic.

- See Samoilowitsch, R.: "S O S in der Arktis."

- See Zeppelin: Wissenschaftl. Arktisfahrt des Graf Zeppelin.

Argentine. See Anderson, C. Rivers: Aeronautics in the Argentine.

Argus. A new Argus engine.

Aircraft Engineering, Vol. 3, No. 31 (Sept. 1931), London, p. 219, ill.

- See Heinze, Edwin P. A.: The new Argus 8-cyl. engine.

- See Oestrich, Hermann: Untersuchung eines Flugmotoren-Geblases,

Bauart Argus-Roots.

Armament. See Great Britain: Increased armamnent for military aeroplanes.

Armangué, Antonio. Elementos de aviación.

Barcelona, G. Gilí, 1931, pp. 214, ills., diagrs.

Armani, A. Ex alto ad signum. Anedotti ed episodi di bombardamenti aerei. Roma, Librería della stato, 1931.

Armstrong Siddeley. Armstrong Siddeley motors.

Flygning, Ârg. 9, N:R 4 o. 5 (April-Maj 1931), Stockholm, pp. 96,100, ills.

- See Kuipers, C: De Armstrong-Siddeley vliegtuigmotoren.

Armstrong-Whit worth. See Handasyde, G. H.: Steel tube and strip. The works of Armstrong-Whitworth aircraft at Coventry visited and described.

Army-Navy. A N standards conference.

Airway Age, Vol. 13, No. 1 (July 4, 1931), New York, pp. 44-45.

Arn all, Philip. Portrait of an airman. London, John Lane, 1931.

Arnesen, Odd. Luftens heiter, âtte stjerner pa [!J flyvningens himmel. Osla, J. W. Cappelen, 1931, pp. 142, ills.

Arrow. The Arrow "Active."

Flight, No. 1178, Vol. 23, No. 30 (July 24, 1931), London, pp. 727-730, ills.

Arsandaux, L. Investigation of certain wing shapes with sections vayring progressively along the span.

National Advisory Committee for Aeronautics, Technical Memorandums No. 617, April 23, 1931, Washington, April 1931, pp. 44, diagrs.

Art. Les récompenses de l'exposition "L'art el l'aéronautique." L'Aérophile, 39e année, No. 1 (15 jan. 1931), Paris, pp. 7-8, ills.

Arthur, William E. Airport development.

Aero Digest, Vol. 19, No. 1 (July 1931), New York, pp. 50-53, ills.

Artificial horizon. See K., A: The aviator's artificial horizon.

I

Asia. The airways in Asia.

Flight, No. 1166, Vol. 23, No. 18 (May 1,1931), London, pp. 386-387, map.

Asjes, D. L. De vliegschool.

Het Vliegveld, 15de Jaarg., No. 8 (Aug. 1931), Amsterdam, pp. 280-281, ills.

Askania. Le compte-tours Askania à transmission pneumatique à distance.

L'Aéronautique, 13me année, No. 146, Bulletin L'Aérotichnique, 9e année, No. 103 (juil. 1931), Paris, p. 252, ills.

- L'enregistreur photographique de trajectoires Askania.

L'Aéronautique, 13me année, No. 147 (août 1931), Paris, p. 300, ills.

Aspect ratio. See Munk, Max Michael: The aspect ratio. Article thirteen on the principles of aerodynamics.

Atkin, E. H. Torsion in thin cylinders.

Aircraft Engineer, Flight Engineering Section, Suppl. to No. 1187, 1192, Vol. 23, No. 39, 44 (Sept. 25, Oct. 30, 1931), London, pp. 970f-970h, (70-72), 1086d-1086e, (76-77), ills.

Atlantic. Atlantic flight chronology.

Aero Digest, Vol. 19, No. 6 (Dec. 1931), New York, pp. 33-37, ills.

- See B., H.: La poste transatlantique et les accords internationaux d'aviation

marchande.

- See Boffito, G.: Una traversata dell'Atlantico in pallonenel 1876.

- See Bonifacio, Gaetano: Ali italiane vittoriose. La crociera aerea transatlantica dello stormo di Italo Balbo.

- See Connor, Harry P.: Crossing the North Atlantic.

- See Courtney, F. T.: Trans-Atlantic air mail.

- See Denmark: Dansk Atlantflygning.

- See Dixon, Charles: The conquest of the Atlantic by air.

- See Hinkler, Bert: The return of Bert Hinkler.

- See Italy: De eskader-oceaanvlucht der Italianen.

- See Italy: Italian squadron's Atlantic cruise.

- See McDonnell, J. S., Jr.: Present status of transatlantic service.

- See McDonnell, J. S., Jr.: Trans-Atlantic service.

■- See Martelloni, Giovanni F.: Orazione non detta per il volo atlantico

dell'aquile di Roma.

- See Newcomb, J. Arthur: Transatlantic nights, 1931.

- See Nosari, Adone: Ali e vele sull'Atlantico.

- See Rysky, Carlo de: La croissière italienne dans l'Atlantique-Sud.

Atlantic seaboard. See Van Orman, Ward T.: A preliminary meteorological survey for airship bases on the middle Atlantic seaboard.

Atlas. See Great Britian. Air Ministry: The Mark I Atlas army co-operation aeroplane. With an appendix on the Atlas dual control aeroplane. Vol. 1.

- See Gulf Refining Company: Aviation atlas.

Atlas. See Jones, E. T.: Flight tests on an Atlas fitted with automatic slots connected with the ailerons and some data relevant to the design of auto-slots for R.A.F. 28 section wing.

Atmosphere. On antics of the atmosphere.

Aeroplane, Vol. 41, No. 25 (Dec. 16,1931), London, pp. 1353-1354.

- See Davies, E. LL., and 0. G. Sutton: Some problems of modern meteorology, No. 5. The present position of the theory of turbulent motion in the atmosphere.

- See Diehl, Walter Stuart: Some approximate equations for the standard

atmosphere.

- See Lange, K. O.: Measurement of vertical air currents in the atmosphere.

- See Neumark, Stefan: Badanie wolnego spadku z uwzglednieniem oporu

powietrza o zmiennej gQstoéci.

- See Noto, Hisashi: Electric oscillations in the atmosphere.

- See Tinson, Clifford W.: Correction of aeroplane performance to standard

atmosphere (Density basis).

Atomic heat. See Endo, Yositosi: Atomic heat at constant pressure of crystalline substances.

Attal, Salvatore. La conquista dell'aria: L'illusione e la realtà. Riv. Aer. Anno 7, N. 11 (nov. 1931), Roma, pp. 247-258.

Austin, A. O. Lighting investigation as applied to the airplane.

U.S. Air Services, Vol. 16, No. 8 (Aug. 1931), Washington, pp. 28-33, ill.

Australia. The Australian Christmas air mail.

Flight, No. 1200, Vol. 23, No. 52 (Dec. 25,1931), London, pp. 1257-1259, ills.

- Developments in Australia.

Flight, No. 1162, Vol. 23, No. 14 (April 3,1931), London, p. 297.

- De eerste Nederlandsche postvlucht naar Australie.

Het Vliegveld, 15de Jaarg., No. 7 (Juli 1931), Amsterdam, pp. 237-239, ills.

- See Scott, C. W. A.: Mr. Scott's record flight to Australia.

Austria. Oesterreich. Gesetzgebung. Zusammenstellung der in Oesterreich geltenden Vorschriften für den Luftverkehr.

Nachrichten für Luftfahrer, 12. Jahrg., Nr., 21-22 (30. Mai 1931), Berlin, pp. 148-151.

- Oesterreich. Vertrag zwischen der Republik Oesterreich und dem

Königreich der Niederlande über den Luftverkehr.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 27 (4. Juli 1931), Berlin, pp. 188-190.

Autogiro. The autogiro.

Scient. Amer. Voi. 144, No. 3 (March 1931), New York, pp. 192-194, ills.

- For the greatest achievement in American aviation.

Nat. Aer. Mag., Vol. 9, No. 5 (May 1931), Washington, pp. 31-33, ills.

- Gyratory traffic at Hanworth.

Aeroplane, Vol. 41, No. 22 (Nov. 25,1931), London, pp. 1224-1230.

- New autogiros.

Flight, No. 1159, Vol. 23, No. 11 (March 13,1931), London, p. 220, ill.

- On the autogiro.

Aeroplane, Vol. 41, No. 4 (July 22, 1931), London, p. 228.

Autogieo. Three commercial autogiros.

Aviation, Vol. 30, No. 7 (July 1931), New York, pp. 408-415, ills.

- Two new autogiros.

Flight, No. 1195, Vol. 23, No. 47 (Nov. 20, 1931), London, pp. 1145-1148, ills.

- El viaje mâs largo hecho en autogiro.

Ibérica, Ano 18, Num. 879 (23 mayo 1931), Barcelona, pp. 325-326.

- See Cierva, Juan de la: The autogiro.

- See Cierva, Juan de la, and Don Rose: Wings of tomorrow; the story of the

autogiro.

- See Edison: Edison on the flying machine.

- See K., A.: A debate about the autogiro.

- SeeK.,A.: A rival of the autogiro?

- See Kârmân, Theodore von: Die Seitenwege der Luftfahrt.

- See Kellett: The Kellett autogiro.

- See Kellett: Kellett side by side autogiro.

- See Mounier, P. J. J.: Vliegende windmolens.

- See Pecker, J. S.: Autogryo rotor system.

- See Sanders, C. J., and A. H. Rawson: the book of the C. 19 autogiro; the

principle of operation described together with notes on running and maintenance.

Automatic control. Automatisk kurs-styrning av flygplan.

Flygning, irg. 9, N:R 40.5 (April-Maj 1931), Stockholm, pp. 93-95, ills.

- See Étévé: Recherches et experiences sur le pilotage automatique.

Automatic flight. An approach to automatic flight.

Western Flying, Vol. 9, No. 5 (May 1931), Los Angeles, Calif., p. 31.

Automatic stability. Deux dispositifs de stabilisation automatique. La dispositif de stabilité par gyroscopes Marmonnier. Las girouettes de stabilisation Constantin.

L'Aérophile, 39eannée, No. 1 (15. jan. 1931), Paris, pp. 17-21, ills.

- See Marmonier, L.: La stabilité et la direction automatiques des avions.

Autonotation. See Knight, Montgomery, and Carl J. Wenzinger: Rolling moments due to rolling and yaw for four wing models in rotation.

- See Pitcairn, Harold F.: Autorotation.

Autorotative. See Schmidt, Wilhelm: Development of a non-autorotative airplane capable of steep landing.

Avarello, C. See Zanetti, M., and C. Avarello: Manuale del fotografo d'aeronautica.

Avia. Le vol sans moteur.

Paris, 1931?, pp. 16, ills. Club Aéronautique Universitaire, Paris.

Aviaticus. "Aviaticus", Jahrbuch der Deutschen Luftfahrt, 1931. Herausgegeben von der Interessengemeinschaft der Deutschen Luftfahrt: Reichsverband der Deutschen Luftfahrt-Industrie und Deutsche Luft Hansa A.-G. Berlin, Union Deutsche Verlagsgesellschaft Zweigniederlassung, 1931, pp. 404, ills.

Aviation News. The Aviation News; a reporting service for busy aviation men. Vol. 1; July 12-Oct. 25,1930. Weekly.

New York, McGraw-Hill Publishing Company, inc., 1930, pp. [380]. No more published.

Aviation Register. See Greene, Lewis: Aviation register.

Avigation. See Holland, Harvey Hodges: Avigation.

- See Jones, Bradley: Avigation.

Aviolanda-Robur. See Parachutes: Het Aviolanda-Robur valscherm.

Avro. An Avro mail plane.

Aeroplane, Vol. 41, No. 7 (Aug. 1931), London, pp. 426-434, ills.

Flight, No. 1181, Vol. 23, No. 33 (Aug. 14,1931), London, pp. 802-807, ills.

- The Avro 626 advanced training aeroplane.

Flight, No. 1175, Vol. 23, No. 27 (July 3,1931), London, pp. xxxv-xxxviii, 635, ills.

- The Avro 627 " Mailplane " (English). A single-seat biplane.

National Advisory Committee for Aeronautics, Aircraft Circulars No. 150, Aug. 31, 1931, Washington, August 1931, pp. 8, ills.

- See Clark, K.W., and W. G. Jennings: Full scale determination of the

motion of an Avro aeroplane when stalled.

Axe, Leonard H. Aviation insurance.

New York, Insurance Institute of America, 1931, pp. 39.

B

B. Das Kleinflugzeug für M 3450.

Die Umschau, 35 Jahrg., Heft 10 (7. März 1931), Frankfurt a. M., p. 198.

B., H. Les budgets aéronautiques.

L'Aéronautique, 13me année, No. 144 (mai 1931), Paris, p. 183.

- Le cas de l'aéropostale.

L'Aéronautique, 13me année, No. 143 (avril 1931), Paris, p.. 114-115.

- La crise de l'aéronautique marchande aux États-Unis.

L'Aéronautique, 13me année, No. 145 (juin 1931), Paris, pp. 194-195, ill.

- La poste transatlantique et les accords internationaux d'aviation marchande.

L'Aéronautique, 13me année, No. 147 (août 1931), Paris, pp. 301-302, ills.

- Les records de distance et de durée sur circuit, en avion.

L'Illustration, 89e année, No. 4593 (14 mars 1931), Paris, p. 304, ill. Bossoutrot et Rossi.

Backus, H. A. See Knerr, H. C, and H. A. Backus: Development of steel wing beams for aircraft.

Bader, H. G. Dornier-Flugboot " Do S-Has".

Zeitschr. Ver. deutscher Ing., Bd. 75, Nr. 8 (21. Feb. 1931), Berlin, pp. 228-230, ills.

Badia Polesine, Jotti da. L'opera aeronautica del padre conte Francesco Lana Terzi, Bresciano. '

Milano, Libreria Aeronautica, 1931.

Baes, L. Les profiles a larges ailes et less profiles de grande hauteur.

1931, pp. 80, ills.

Baeschlin, F. Internationales Archiv für Photogrammetrie.

Edited by f. Baeschlin, Brunn, etc., Rudolph M. Rohrer 1930, 1931. VII. Band, I. Hälfte 1924-1930, pp. viii, 202. II. Hälfte 1930-1931, pp. 4, 302, ills. map.

These two half volumes form the complete report of the International Congress of Photo« grammetry held at Zurich 6-10 September 1930. The first half volume was published at the time of the congress giving an account of the technical progress and photogrammetrie activity. The second half appeared over a year later covering work of the congress under fourteen separate commissions, each dealing with a part of the subject, and, as a whole covering comprehensively the whole range of activities largely from the technical side.

Bagdad. See Knauss, Robert: Erster Lufthansa-Postflug nach Baghdad.

Bailey, Benj. F. The design of capacitor motors for best starting performance.

Department of Engineering Research, University of Michigan, Engineering Research Bulletin, No. 19, April 1931, Ann Arbor, pp. 23, diagrs., tabls.

B aisle y, H. K. Aerial mapping in Central America.

National Glider and Airplane News, Vol. 3, No. 2 (Sept. 1931), New York, pp. 27-28, ill.

Balance. See Dowd, R. E.: Model builder's balance. Make it in your own shop.

Balbo, Italo. Stormi in volo sull'oceano.

Milano-Verona, A. Mondadori edit, tip., 1931, pp. 258, ills.

- See Bonifacio, Gaetano: Ali italiane vittoriose. La crociera aerea transatlantica dello stormo di Italo Balbo.

Balchen, Bernt. Aviation lessons of the Antarctic. The Antarctic region, its extent, elevation, and climatic conditions—Flight problems of the Byrd expedition as told by its Chief Pilot—The planes used and their equipment— Methods used in storing planes during the winter season—Precautions which future parties should observe.

Mech. Eng., Vol. 53, No. 7 (July 1931), New York, pp. 489-497, ills.

Balchen, Bernt. See Lawrence, John: Bernt Balchen, viking of the air.

Balfour, L. M. J. See Green, E. Ramsay, and L. M. J. Balfour: An invitation to visit Yugoslavia.

Balkom, v. De Ja -V.A.

Het Vliegveld, 15de Jaarg., No. 4, 7 (April, Juli 1931), Amsterdam, pp. 141-142, 247, ill.

Ballistics. See Eberhard, O. v.: Ballistik.

Ballooning. See Germany: De ballonsport in Duitschland.

- See Petschow, Robert: Freiballonsport.

Balloons. Nationale amerikanische Ballonwettfahrt 1931. Luftschau, 4. Jahrg., Nr. 17 (10. Sept. 1931), Berlin, p. 53.

- See Emden, R.: Der Freiballon.

- See Neerlandia: Ballonvaart "Neerlandia" op 17 November 1930.

- See Sonntag: Der Freiballonsport in Zahlen.

- See Theuermeister, Robert: Vom Luftballon zum Zeppelin.

Bally, J. Piccard & Kipfer. Comment ils ont pu réaliser en cabine étanche leur ascension dans la stratosphère.

Compiegne, d. de Él'auteur, 1931, pp. 40, ills.

Bamber, Millard John. Wind tunnel tests on airfoil boundary layer control using a backward-opening slot.

National Advisory Committee for Aeronautics, Report No. 385, Sept. 8, 1931, Washington, U.S. Government Printing Office, 1931, pp. 38, ills., diagrs., tabls.

Banarji and Barave. On Oberbeck's vortices.

Philosophical Magazine, Vol. 11, No. 73 (May 1931), London, pp. 1057-1081.

Banking. See Cutter, Charles N.: Banking by air.

Banks, F. Rodwell. The evolution of a Schneider engine.

Aeroplane, Vol. 41, No. 15 (Oct. 7, 1931), London, pp. 864-872, ills.

- The question of fuel quality. The technique of aero-engine fuel production with special reference to Ethyl.

Aircraft Engineering, Vol. 3, No. 29 (July 1931), London, pp. 168-170.

Baranoff, A. v., and L. Hopf. Combined pitching and yawing motion of airplanes.

National Advisory Committee for Aeronautics, Technical Memorandums No. 620, May 14, 1931, Washington, May 1931, pp. 29, diagrs.

Barbero, T. L. I cento aeroplani Caproni, 1909-1931. A Cura di "Aeronautica ", rivista mensile internazionale. Milano, ediz. Aeronautica, 1931, pp. 43, ills.

Barbieri, Fortunato. Navigazione aerea; corso allievi pilotianno 1931.

Roma, Stabilimento tipo-litografico di A. Sampaolesi, 1931, pp. 128, ills., diagrs.

Barès. Les forces aériennes et le ministère de l'air.

L'Aérophile, 39e année, No. 2 (15 fév. 1931), Paris, p. 33.

Barker, Fowler W. Air pioneers of the west.

Aero Digest, Vol. 18, No. 2 (Feb. 1931), New York, pp. 40-43, 120, ills.

Barnaby, Hattie Meyers. Let's go to the Elmira soaring meet! U.S. Air Services, Vol. 16, No. 8 (Aug. 1931), Washington, p. 27.

- Suggested by the Washington Air Circus.

U.S. Air Services, Vol. 16, No. 6 (June 1931), Washington, pp. 39, 41.

Barnard, Charles Douglas. Barnard on learning to fly.

London, S. Low, Marston and Co., ltd., 1931, pp. xi, 172, ills., diagrs.

Barnitz, Richard B. The effect of airplane design on airports.

Airway Age, Vol. 13, No. 5 (Aug. 1, 1931), New York, pp. 134-136, ill.

- Gleaned from the Conference.

Airport Section, Western Flying, Vol. 9, No. 5 (May 1931), Los Angeles, Calif., pp. 85-87.

- How the law can help airports.

Western Flying, Vol. 9, No. 1 (Jan. 1931), Los Angeles, Calif., pp. 75-76.

- Safety at airports.

U.S. Air Services, Vol. 16, No. 11 (Nov. 1931), Washington, D.C., pp. 35-37.

Barros. The Barros stall warning device.

Flight, No. 1181, Vol. 23, No. 33 (Aug. 14, 1931), London, p. 812.

Barrows, George H. The lighter-than-air leviathan.

The Washington Post (Magazine), Aug. 2, 1931, Washington, pp. 3,11, ills.

Bartarelli, A. See Caproni, Guasti Timina, e A. Bartarelli: Francesco Zam-beccari aeronauta; Bologna 1752-1812.

Bartla. Metoda wykreâlenia rodziny profili R. Bartla.

Instytut Badan Technicznych Lotnictwa, Sprawozdanie, Kwartalne Nr. 1, Warszawa, 19- pp.

Bartocci, Enzo. Rassegna delle teorie enunciate e degli studi svolti sino ad oggi sul volo a vela.

L'Aerotecnica, Voi. 11, No. 10 (ott. 1931), Roma, pp. 1269-1283, ills. Abstract in english p. 1340.

Batavia. See Beekman, W.: In één week van Batavia naar Amsterdam.

- See Spit, G.: Amsterdam-Batavia met Zeppelins.

Bateman, H. See Lock, C. N. H., and H. Bateman: Airscrews at negative torque.

Batson, A. S., H. B. Irving, and S. B. Gates. Spinning experiments on a single-seater fighter. Part I.—Further model experiments, by A. S. Batson and H. B. Irving; Part II.—Full scale spinning tests, by S. B. Gates.

Aer. Res. Comm., Rep. Mem., No. 1278 (Ae. 424-T. 2823 Spin 8), August 1929, London, 1931, pp. 10, ills., diagrs., tabi.

Batson, A. S. See Irving, H. B., A. S. Batson, and A. L. Maidens: Rolling and sideslip experiments on a model slotted biplane of R.A.F. 31 section.

- See Irving, H. B., and A. S. Batson: Some early model experiments on

devices for improving lateral control near the stall.

- See Irving, H. B., and A. S. Batson: Spinning of a model of the Fairey

11 If seaplane.

- See Williams, D. H., and A. S. Batson: Pressure distribution over a

yawed aerofoil, by D. H. Williams, with an appendix on rolling moments on a yawed aerofoil, by A. S. Batson.

Batten, J. D. Wing-beats-II.

Journ. Roy. Aer. Soc, Vol. 35, No. 252 (Dec. 1931), London, pp. 1140-1151, ills., diagrs.

Batteries. See Smithowski, John G.: Construction and care of storage batteries.

Baubiac, J. See Crausse, E., et J. Baubiac: Sur l'application d'une méthode d'enregistrement à l'étude des tourbillons se produisant dans les liquides.

- See Crausse, E., et J. Baubiac: Sur les tourbillons secondaires se produisant à l'aval d'un obstacle immergé dans un liquide.

Baumgarten-Crusius, Artur. Die rakete als weltfriedenstaube.

Leipzig, Verband der Raketen-forscher und -förderer, 1931, pp. 174, ills., diagrs.

Baumhauer, A. G. von. Vergadering van de W. G. L. te Kiel.

Het Vliegveld, 15 de Jaarg., No. 8 (Aug. 1931), Amsterdam, pp. 268-272, ills.

Beacons. Utprovning av flygfyrar.

Flygning, Ârg. 9, N:R 7 (Juli 1931), Stockholm, pp. 136-137, ills.

- See Daugherty, R. A.: Forestry towers as airway beacons.

- See Hinman, W. S., jr.: Automatic volume control for aircraft.

- See Lighting: Aga flygfyrar.

- See Toulman-Smith, A. K.: The range of air line beacons.

Beadle, J. B. Air survey for Hoover Dam.

Aero Digest, Vol. 19, No. 1 (July 1931), New York, pp. 39-43, ills.

Beams. See Huber, T.: Zginanie belek prostych o przekrojach wiotkich.

Beard, Albert Paul. See Peck, William Cecil, and Albert P. Beard: Static, drop, and flight tests on Musselman type airwheels.

Bearings. See Taylor, E. S.: Bearing loads on radial-engine crankshafts.

Beck, Waldemar C.-A. Le budget aéronautique allemand por 1931. L'Aéronautique, 13me année, No. 144 (mai 1931), Paris, pp. 183-185.

Becker, Paul. Connecticut—an aviation leader. Rapid progress made under

state aeronautics department.

Aero Digest, Vol. 18, No. 6 (June 1931), New York, pp. 45,152, ill.

Bedell, Frederick. The airplane a practical discussion of the principles of airplane flight. Rewritten and enlarged with the assistance of Theodore E. Thompson.

London, Macmillan and Co., ltd., 1931, pp. xiii, 371.

Beekman, W. In één week van Batavia naar Amsterdam.

Het Vliegveld, 35 de Jaarg., No. 6 (Juni 1931), Amsterdam, pp. 200-202, ills.

Behmann, Mario. Un nuovo motore di aviazione.

Riv. Aer., Anno 7, N. 2 (feb. 1931), Roma, pp. 290-294, ills., diagrs.

Beinhorn. Elli Beinhorn, Schlerf und Udet erzählen.

Luftschau, 4. Jahrg., Nr. 9 (10. Mai 1931), Berlin, pp. 65-67, ports.

Belgium. Belgien. Zollvorschriften. Ministerialerlass vom 15. Juli 1930 über die Vereinfachung der Zollabfertigung im Luftfahrer.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 25 (20. Juni 1931), Berlin, pp. 173-176.

- "Fireflies" for Belgium.

Flight, No. 1176, Vol. 23, No. 28 (July 10,1931), London, p. 672, ills.

- Guide des aérodromes Belges.

Bruxelles, Admistration de l'Aéronautique, 1931.

- Lufttüchtigkeit. Kgl. Erlass zur Regelung der Lufttüchtigkeit von

Luftfahrzeugen vom 27. Dezember 1930.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 12 (21. März 1931), Berlin, pp. 71-73.

- Verordnung. Kgl. Entschliessung vom 11. Mai 1931 zur Aenderung der

Belgischen Luftfahrtverordnung vom 27. November 1919.

Nachrichten für Laftfahrer, 12. Jahrg., Nr. 41 (10. Okt. 1931), Berlin, pp. 298-299.

Bell, A. H. See Jones, R., and A. H. Bell: Biplane fins on a model of R. 101.

- See Jones, R., and A. H. Bell: Experiments on models of a compressed air

wind tunnel.

Bell Telephone laboratories. Aircraft radio development.

New York, Bureau of Publication, Bell Telephone Laboratories, 1930, pp. 26, ills., diagrs. This reprint of a series of articles which appeared in Bell Laboratories Record is issued to present a connected story of the development of the Western Electric aircraft radio equipment.

Beltramo, Ernesto. Aerei idrosiluranti.

Riv. Aer., Anno 7, N. 3 (marzo 1931), Roma, pp. 431-442.

Bénard, Henri. Nouvelles installations por l'étude des sillages à l'Institut de Méchanique des Fluides.

L'Aéronautique, 13me année, No. 147, Bulletin L'Aérotechnique, 92 année, No. 104 (août 1931), Paris, pp. 291-293, ills.

Bénard-Karman. See Dupin, P., et Trissé-Solier: Hydrodynamique.—Sur les tourbillons alternés de Bénard-Karman et la loi de similitude dynamique de Reynolds.

Bennett, Dale Elmer. See Tuttle, Alonzo Hubert, and Dale Elmer Bennett: Extent of power of Congress over aviation.

Berättar, Björkvall. Min son flygaren.

Flygning, Ârg. 9, N:R 12 (Dec. 1931), Stockholm, p. 241, port.

Berchtold, William E. All for one—one for all. The accomplishments of the Aeronautical Chamber of Commerce.

Western Flying, Vol. 9, No. 1 (Jan. 1931), Los Angeles, Cal., pp. 28-31.

Bergling, Joseph C. Flying the rubber glider.

The Take-Off, Vol. 3, No. 1 (March 1931), Washington, pp. 1, 7.

Berlin. Ârets flygprogram fastställt vid konferens i Berlin. Flygning, irg. 9, N:R 2 (Febr. 1931), Stockholm, pp. 28, 36.

- See Rozendaal, John: Berlijnsche brief.

Berlin-Tokio. Berlin-Tokio in 10 Tagen. Aus dem Reisebericht des japanischen Fliegers Yoshihara.

Luftschau, 4. Jahrg., Nr. 4 (24. Feb. 1931), Berlin, pp. 26-27, ill.

Bernard. The Bernard 80 G. R. long-distance airplane (French). A two-place cantilever monoplane.

National Advisory Committee for Aeronautics, Aircraft Circulars No. 147, July 11, 1931, Washington, July 1931, pp. 6, ills.

- Le monoplan Bernard 80 G. R. du record du monde de distance en circuit.

L'Aéronautique, 13me année, No. 145 (juin 1931), Paris, pp. 197-201, ills.

- See L., P.: Le poste de commande de Bernardi à gouvernes conjuguées.

- See Léglise, Pierre: The Bernard 120 seaplane (French). A 1,400 hp.

single-seat monoplane racer.

Bernardi, Mario de. Single unit control.

Aero Digest, Vol. 19, No. 4 (Oct. 1931), New York, pp. 72-74, ills.

Bertin, Ch. See Charcot, Jean: Rapport du Dr. Jean Charcot sur les tables de navigation du Commandant Ch. Bertin.

Besançon, Georges. L'année aéronautique 1930.

L'Aérophile, 39e année, No. 5, 6 (15 mai, 15 juin 1931), Paris, pp. 131-134, 170-175, ills.

Bessière, P.-L. À propos des accidents causés par les avions à la surface du sol. L'Aérophile, 39e année, No. 12 (15 déc. 1931), Paris, p. 372.

- La naissance d'un droit nouveau.

L'Aérophile, 39e année, No. 10 (15 oct. 1931), Paris, pp. 317-318.

- Le passager à titre gratuit ne peut réclamer une indemnité au pilote, en

cas d'accident, que si celui-ci à commis une faute.

L'Aérophile, 39e année, No. 7 (15 juil. 1931), Paris, p. 215.

- La responsabilité civile de l'exploitant comparée à celle de l'automobiliste.

L'Aérophile, 39e année, No. 8 (15 août 1931), Paris, pp. 251-252.

- La responsabilité du transporteur.

L'Aérophile, 39e année, No. 3 (15 mars 1931), Paris, pp. 86-87.

Best, Robert Donald. See Marvin, Charles Frederick, jr., and Robert D. Best: Flame movement and pressure development in an engine cylinder.

Betaz, Baur de. Einiges über internationale Luftfahrtorganisationen und Konferenzen.

Luftschau, 4. Jahrg., Nr. 6, (24. Marz 1931), Berlin, pp. 41-42,

Betz, Albert. Mikromanometer.

Wien, W., und F. Harms: Handbuch der Experimentalphysik, 'Bd. 4, 1. Teil. Hydro- und aerodynamik, Leipzig, Akademische Verlagsgesellschaft m.b.H., 1931, pp. 511-551, ills.

Beyer-Desimon, Max von. Flughaftenanlagen.

Berlin, Verlag von Wilhelm Ernst & Sohn, 1931, pp. 156, ills.

Bibesco. L'accident du Prince Bibesco.

L'Illustration, 89e année, No. 4599 (25 avril 1931), Paris, p. 507, ill.

Bibesco, Georges. Le Prince Georges Bibesco, Président de la Fédération Aéronautique Internationale.

Bull. Féd. Aér. Int., 12e année, No. 44 (jan. 1931), Paris, pp. 5-6, port.

Bibesco, Prince George. Le tragique voyage du Président de la F.A.I.

Bull. Féd. Aér. Int., 12e année, No. 46-47 (juil.-oct. 1931), Paris, pp. 110-113, ill.

Bibliography. See Brockett, Paul: Bibliography of Aeronautics 1929.

- See Seattle Public Library: List of books in the Seattle Public Library.

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Bilbault, G. Adaptation directe du groupe motopropulseur par la méthode graphique à échelles logarithmiques.

L'Aéronautique, 13me année, No. 147, 148 Bulletin L'Aérotechnique, 9e année, No. 104,105 (août, sept. 1931), Paris, pp. 283-290, 321-325, diagrs.

Bingham, Hiram. The future of aviation.

Nat. Aer. Mag., Vol. 9, No. 8 (Aug. 1931), Washington, pp. 8-13.

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the National Aeronautic Association as related to uniformity in aeronautic legislation and regulation.

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Binnie, A. M. The influence of oxygen on corrosion fatigue.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 994-996, ills., diagrs. Rep. Mem. No. 1244. (M. 63.)

Biplane fins. See Jones, R., and A. H. Bell: Biplane fins on a model of R. 101.

Biplanes. See Bonder, Juljan, i Piotr Szymanski: Contribution à la théorie du biplan.

Bird, W. G. The influence of atmospheric humidity and other factors upon the static lift of airships.

Journ. Roy. Aer. Soc, Vol. 35, No. 251 (Nov. 1931), London, pp. 973-1039, diagrs.

Bird flight. See Tâning, A. Vedel: Ravens flying upsidedown.

Birmingham. See York, Jack C: Birmingham, Alabama has new port.

Birnn, Roland. An aerial jaunt around Long Island.

Nat. Aer. Mag., Vol. 9, No. 3 (March 1931), Washington, pp. 34-36, ills.

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Curtis-Wright Review, Vol. 2, No. 1 (March 1931), New York, p. 15.

- The 1st air division.

U.S. Air Services, Vol. 16, No. 6 (June 1931), Washington, pp. 15-18.

- The Ordnance show—Air Corps assisting.

U.S. Air Services, Vol. 16, No. 11 (Nov. 1931), Washington, D.C., pp. 31-34, ill.

- Smoke screens from the sky.

Nat. Aer. Mag., Vol. 9, No. 10 (Oct. 1931), Washington, pp. 23-26, ills.

- Such was the 1st provisional air division.

U.S. Air Services, Vol. 16, No. 7 (July 1931), Washington, pp. 33-36.

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Bisail, Aurelius. Flugmodelle in théorie und praxis; einführung in die grundbegriffe des fluges und anleitung zum bau von flugmodellen mit gummiantrieb nach verschiedenen baumethoden.

Wien, Verlag Zeitschrift "Flug", H. Pittner, 1931, pp. 54, ills.

Bishop, Roy. See California: Report of the Joint Legislative Committee on Aviation.

Björkvali, Knut. See Vitt, Leonard: Flygarprofiler Knut Björkvali.

Black Archibald. How long will it last?

Airway Age, Vol. 12, No. 1 (Jan. 1931), New York, pp. 38-39, diagrs.

- Looking back at January's prediction.

Airway Age, Vol. 13, No. 1 (Jul. 4,1931), New York, pp. 36, 45, diagr.

- Record and trend of the industry.

Airway Age, Vol. 12, No. 1-5, 10 (Jan.-May 2, June 6, 1931), New York, pp. 36-38, 154-155, 252-253, 356-357, 458-459, 578-579; Vol. 13, No. 1, 5, 10, 14 (July 4, Aug. 1, Sept. 5, Oct. 3, 1931), pp. 34-35, 128-129, 208-209, 272-273, diagrs.

Blackburn. See Coombes, L. P., and R. K. Cushing: Lift and drag of Blackburn "Iris."

Blackburn, E. C. Jr. Heat and ventilation.

Aviation, Vol. 30, No. 5, 6 (May, June 1931), New York, pp. 300-304, 365-369, ills.

Blackpool. The Blackpool pageant.

Flight, No. 1177, Vol. 23, No. 29 (July 17,1931), London, pp. 688-692, ills.

Blake, Dean. Weather reporting for the Air Corps.

U.S. Air Services, Vol. 16, No. 7 (July 1931), Washington, pp. 44, 46.

Blanchet, Georges. Aviation et art maritime.

L'Aérophile, 39e année, No. 2 (15 fév. 1931), Paris, p. 60.

- La Coupe.

l'Aérophile, 39e année, No. 10 (15 Oct. 1931), Paris, pp. 291-293, ills, port.

- Personnalités contemporaines. Julien Servies.

L'Aérophile, 39e année, No. 5 (15 mai 1931), Paris, p. 130, port.

Blankenburg. Katapultflug über 1200 km.

Luftschau, 4. Jahrg., Nr. 19 (10. Okt. 1931), Berlin, p. 79.

Blau Gas. See Teed, P. L.: Gas fuel for airships. The manufacture of Blau Gas, with details of some possible alternatives.

Blee, Harry H. The developement of air transportation in America.

Nat. Aer. Mag., Vol. 9, No. 5 (May 1931), Washington, pp. 11-16, 25, ills. map.

- Protección de hangares de aeroplanos. Resumen del informe del comité

de investigaciones sobre el control de hangares para aeroplanos por applica-ción automática del agua.

Ingeniera, Vol. 5, No. 2 (feb. 1931), México.

Bleriot. The Bleriot 110 airplane (French). A long-distance high-wing monoplane.

National Advisory Committee for Aeronautics, Aircraft Circulars No. 138, March 10, 1931, Washington, March 1931, pp. 9, ills.

Blind flying. Blind flying. A cabin aircraft which has been adapted for instruction in flying by instruments.

Flight, No. 1173, Vol. 23, No. 25 (June 19, 1931), London, p. 554, ills.

- A new instrument for blind flying.

Aeroplane, Vol. 41, No. 8 (Aug. 19,1931), London, pp. 495-496, ills. The Reid-Sigrist Turn Indicator.

- See Bradbrooke, F. D.: An experience of blind flying.

- See Celler, Frederic: Landing blind.

- See Diamond, H., and F. W. Dunmore: Airplanes land blind—guided by

radio.

- See Instrument flying: On "instrument flying."

- See Jenkins, H. F.: Blind flying and some conclusions.

- See Klemin, Alexander: Electrical aids to blind flying.

- See Kruesi, G. G.: A new homing device for blind flying.

- See Lindner, C. J.: Blindflygning och dess instrument.

- See Stark, Howard Cyrus: Blind flying or instrument flying? Instruction book.

- See Weber, K.: Blindfliegen.

Block, Walter. Die Prüfung von Objektiven auf Verzeichnungsfehler.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 567-579, ills., diagrs., tabl.

Bloudek. The Bloudek XV. A Jugo-Slav low-wing monoplane.

Flight, No. 1164, Vol. 23, No. 16 (April 17,1931), London, p. 336, ills.

Blum, René. Les assurances aériennes.

Paris, Recueil Sirey, 1930, pp. xi, 421.

Bock, Günther. Grossflugzeuge.

Göttingen, Verlag Vandenhoeck & Ruprecht, 1931, pp. 40, illus. Aus Naturwissenschaft und Technik, Heft 3.

Bodka. Profile Bodka.

Instytut BadanTechnicznych Lotnict wa, Sprawozdanie, Kwartalne Nr. 1, "Warszawa, 19—.

Boedecker, Kenneth J. Engine servicing and service organizations. Aviation, Vol. 30, No. 2 (Feb. 1931), New York, pp. 94-97, ills.

- Overhaul of Wright aircraft engines.

Aviation Engineering, Vol. 5, No. 5 (Dec. 1931), Washington, N.J., pp. 40-42, ills.

Boeing Airplane Company. Handbook of instructions for the assembly and maintenance with parts catalog of the Boeing type P-12E and P-12F airplanes.

Seattle, Boeing Airplane Co., Oct. 1931, pp. 172, ills., diagrs., tabls.

- See Wilson, John: Making airplanes safe. Inspection methods of the

Boeing Airplane Company.

Böen. See Küssner, Hans Georg: Beanspruchung von Flugzeugflügeln durch Böen.

Boerlage, G. D., and J. J. Broeze. The ignition quality of fuels in compression-ignition engines.

Engineering, Vol. 132, Nos. 3435, 3438 (Nov. 13, Dec. 4, 1931), pp. 603-606, 687-689, ills.

Boeving. See Dowd, R. E.: The Boeving devices.

Boffito, G. Nota retrospettive documentarie d'aerotecnica.

L'Aerotecnica, Vol. 11, N. 11 (Nov. 1931), Roma, pp. 1482-1485.

- Una traversata dell'Atlantico in pallóne nel 1876.

Riv. Aer., Anno 7, N. 3 (marzo 1931), Roma, pp. 589-590.

Bohrer, Walt. Forest patrol in the Pacific northwest.

Western Flying, Vol. 9, No. 2 (Feb. 1931), Los Angeles, Cal., p. 91.

Bolivia. Bolivien. Verordnung. Luftfahrtverordnung vom 24. Okt. 1930.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 16 (18. Aprü 1931), Berlin, pp. 106-108.

Bolla, Filippo. La frequenza del vento al suolo e a quote a Palermo.

L'Aerotecnica, Vol. 11, N. 8, 9 (agosto, sett. 1931), Roma, pp. 954-970, 1126-1128, diagrs. English abstract pp. 1064-1065.

Bollenrath, F. Wrinkling phenomena of thin flat plates subjected to shear stresses.

National Advisory Committee for Aeronautics, Technical Memorandums No. 601, Jan. 19, 1931, Washington, January 1931, pp. 34, ills., diagrs., tabls.

Bolts. See Teichmann, Alfred, und Karl Borkmann: Versuche mit langen Bolzen in Holzbau teilen.

Bombing planes. En- eller flermotoriga bombflygplan.

Flygning, Irg. 9, N:R 9 (Sept. 1931), Stockholm, p. 172.

Bonder, Juljan, i Piotr Szymanski. Contribution à la théorie du biplan.

Prac (Instytutu Aerodynamicznego w Warszawie, Zeszyt II, Warszawa, 1928, pp. 53-72, ills.

Bonder, Juljan. Quelques remarques concernant les essais de l'hélice propulsive installée obliquement dans un courant d'air.

Prace Instytutu Aerodynamicznego w Warszawie prowadzone pod kierunkiem prof. C.K Witoszynskiego, Zeszyt III, Warszawa, 1930, pp. 71-79, ills.

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Prace Instytutu Aerodynamicznego w Warszawie, Zeszyt I, Warszawa, 1927, pp. 3-35, ills., tabls.

Bonder, Juljan, i Piotr Szymanski. Sur le multiplan en tandem.

Prace Instytutu Aerodynamicznego w Warzawie, Zeszyt II, Warszawa, 1928,1-24, ills., diagr.

Bongenhielm, Folke. Flygplatsen halle—Leipzig.

Flygning, Arg. 9, N:R 2 (Febr. 1931), Stockholm, pp. 30-31, ills.

Bonifacio, F. Aspetti tecnici, economici e politici del traffico aereo. L'Aerotecnica, Vol. 11, N. 8 (agosto 1931), Roma, pp. 889-922. English abstract, p. 1063.

Bonifacio, Gaetano. Ali italiane vittoriose. La crociera aerea transatlantica dello stormo di Italo Balbo.

Livorno, tip. R. giusti, 1931, pp. 19.

Bonnalie, Alan F. The mechanic specializes.

Western Flying, Vol. 9, No. 6 (June 1931), Los Angeles, Calif., pp. 32-34, ills.

Boone, Andrew R. Engine service in the Navy.

Western Flying, Vol. 10, No. 4 (Oct. 1931), Los Angeles, Calif., pp. 25-27, ills.

- From carrier decks.

Western Flying, Vol. 10, No. 6 (Dec. 1931), Los Angeles, Calif., pp. 18-21, ills.

- Recent developments in radio fog flying.

U.S. Air Services, Vol. 16, No. 5 (May 1931), Washington, pp. 21-23, 56, ill.

- What the Air Corps learned.

Western Flying, Vol. 10, No. 1 (July 1931), Los Angeles, Calif., pp. 26-29, ills.

Borkmann, Karl. See Teichmann, Alfred, und Karl Borkmann: Versuche mit langen Bolzen in Holzbauteilen.

Born, F. Die Stellungslichter der Wasser- und Luftfahrzeuge.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 9.14. Heft (15. Mai, 28. Juli 1931), München und Berlin, pp. 253-255, 428-429, ills.

Bossert, T. W. Aluminum and its alloys in aircraft.

Metals & Alloys, Vol. 1, No. 7 (Jan. 1930), New York, pp. 325-326, ill.

Bossolasco, Mario. La meteorologia ed il vólo a vela.

L'Aerotecnica, Voi. 11, No. 11 (nov. 1931), Roma, pp. 1432-1437. Abstract in English, p. 1491.

Bossoutrot. See B., H.: Les records de distance et de durée sur circuit, en avion.

Bosworth, Clarence E. Take planes to the prospects.

Airway Age, Vol. 12, No. 2 (Feb. 1931), New York, pp. 165-168, ills.

Bouché, Henri. Une entreprise aéronautique sans précédent.

L'Illustration, 88e année, No. 4582 (27 déc. 1930), Paris, pp. 586-587, ill.

Bouché, Henri, et P. R. C. Groves. Études sur la situation économique, administrative et juridique de la navigation aérienne internationale. Genève, 1930.

Bouché, Henri. 10,500 kilomètres en avion sans escale.

L'Illustration, 89e année, No. 4607 (20 avril 1931), Paris, p. 304, ill.

Bouilloux-Lafont, Claude. L'aviation commerciale en France; son histoire— son état actuel—son influence sur la vie économique. Paris, f.-L. Vivien, pp. 128, ills., diagrs.

Boulton, B. C. Design of riveted joints.

Aviation Engineering, Vol. 5, No. 4 (Nov. 1931), Washington, N.J., pp. 26-27, diagrs. tabls.

Bouman, L. F. Een nieuwe koers in de ontwikeling der radio op vliegtuigen.

Het Vliegveld, 15 de Jaarg., Nos. 5-6 (Mei-Juni 1931), Amsterdam, pp. 154-155, 190-193, ills.

- Eenige persoonlijke ervaringen met brandbluschapparaten in het lucht-

havenbedrijf.

Het Vliegveld, 15de Jaarg., No. 10, 11 (Oct., Nov. 1931), Amsterdam, pp. 342-343, 380-382, ills.

- De financieele zijde van het luchthavenbedrijf.

Het Vliegveld, 15de Jaarg., No. 1 (Jan. 1931), Amsterdam, pp. 5-10, ills.

- Het wonderboek der luchtvaart.

Utrecht, W. de Haan, 1931, pp. 119, ill.

Boundary layer. See Abbott, I. H.: Experiments with an airfoil model on which the boundary layer is controlled without the use of supplementary equipment.

- See Elias, Franz: The transference of heat from a hot plate to an air stream.

- See Falkner, V. M., and Sylvia W. Skan: Some approximate solutions of

the boundary layer equations.

- See Glauert, H.: The importance of the boundary layer.

- See Green, J. J.: Breakaway of boundary layer on a cylinder and an airfoil.

- See Ower, E., and C. T. Hutton: Investigation of the boundary layers

and the drags of two streamline bodies.

- See Schrenk, Oskar: Experiments with a wing from which the boundary

layer is removed by suction.

- See Simmons, L. F. G.: Experiments relating to the flow in the boundary

layer of an airship model.

- See Tanner, T.: Movement of smoke in the boundary layer of an aerofoil

without and with slot.

- See Townend, H. C. H.: A study of slots, rings & boundary layer control by

blowing.

- See Townend, H. C. H.: A study of slots, rings and jet control of the

boundary layer.

Bourget. Les terrains—Le Bourget.

L'Aérophile, 39e année, No. 9 (15 sept. 1931), Paris, p. 257.

Bowen, Robert Sidney. Flying from the ground up.

New York, Whittlesey House, McGraw-Hill Book Company, inc., 1931, pp. vi, 234, ills.

Bowen, Robert Sidney, Jr. Trends of the industry during 1930. Aviation, Vol. 30, No. 1 (Jan. 1931), New York, pp. 15-17.

Bradbrooke, F. D. An experience of blind flying.

Aeroplane, Vol. 41, No. 11 (Sept. 9,1931), London, pp. 656-658, ill.

Bradbrooke, F. D. The light aeroplane manual.

London, Chapman and Hall, ltd., 1931, pp. viii, 251, ills. Foreword by Captain G. de Havilland.

- Round the N.F.S. stations.

Aeroplane, Vol. 40, No. 13 (April 1,1931), London, pp. 564, 566, 568, ills.

- Sabena goes north.

Aeroplane, Vol. 40, No. 18 (May 6, 1931), London, pp. 839-840, 842, ills.

- The why and wherefore of the contest. (Schneider trophy.)

Aeroplane, Vol. 41, No. 11 (Sept. 9, 1931), London, pp. 620-622.

Bradfield, F. B. Centre of pressure travel of symmetrical section at small incidence.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 854-862, diagrs., tabls. Rep. Mem. No. 1294. (Ae. 443.)

Bradfield, F. B., and W. G. A. Perring. Drag tests on a large model in a small tunnel.

Aer. Res. Comm., Rep. Mem., No. 1371 (Ae. 498-T. 3054), November 1930, London, 1931, pp. 11, ills., diagrs., tabls.

Bradfield, F. B., and R. A. Fairthorne. Drag tests on full scale float of S. 5.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, 1931, pp. 232-239, ills., diagrs., tabls.

R.A.E. Report No. B. A. 814.

Bradfield, F. B. The effect on lift and drag of corrugating the surface of an aerofoil.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, 1931, pp. 240-244, diagrs., tabls. R.A.E. Report No. B.A. 578.

—■— The 5-ft. open jet wind tunnel, R.A.F.

Aer. Resl Comm., Rep. Mem., No. 1364, (Ae 492-T. 3030), November 1930, London, 1931, pp. 11, ills., diagrs.

- Maximum lift coefficient of R.A.F. 30 all-moving rudder.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 906-909, diagrs. Rep. Mem. No. 1321. (Ae. 458.)

Bradfield, F. B., K. W. Clark, and R. A. Fairthorne. Maximum lift in closed and open jet tunnels.

Aer. Res. Comm., Rep. Mem. No. 1363, (Ae. 491-T. 2977 and "a"), December 1930, London, 1931, pp. 19, ills., diagrs., tabls.

Bradfield, F. B., and F. W. G. Greener. Wind tunnel test of the increased drag of a quarter scale float on adding rivets.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, 1931, pp. 229-231, diagr., tabl. R.A.E. Report No. B.A. 784.

Bradfield, F. B., and H. Davies. Wind tunnel tests of model of "Crusader". Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, pp. 215-217, ill. R.A.E. Report No. B.A. 604.

Bradley, W. F. Jalbert heavy oil engine using carburetor and pre-mixing cylinder under construction for the French air service.

Aut. Ind., Vol. 64, No. 14 (April 4,1931), New York, pp. 548-549, ills.

Brakes. Bendix brakes for aeroplanes.

Aeroplane, Vol. 40, No. 24 (June 17, 1931), London, pp. 1164, 1166, ills.

- Wheel brakes and undercarriages.

Flight, No. 1198, Vol. 23, No. 50 (Dec. 11,1931), London, pp. 1224-1225.

- See L., P.: Les nouveaux systèmes Charlestop de transmission et de

freinage.

Brakes. See L6glise, Pierre: The new "Charlestop" remote brake transmission and control.

- See Michael, Franz: Experiments with airplane brakes.

- See Michael, Franz: Versuche mit Flugzeugbremsen.

- See Neumark, Stefan: Dalsze uwagi o hamowaniu köl laduj^cego samolotu.

- See Neumark, Stefan: Hamowanie köl laduj^cego samolotu.

- See Waring-Brown, R.: Aeroplane braking systems.

- See Waring-Brown, R.: Hydraulic brakes for aircraft. The theoretcial

and practical qualities of the type discussed with descriptions of prominent examples.

Brandes, E. W. Prospecting by air over Papuan jungles.

Nat. Aer. Mag., Vol. 9, No. 3 (March 1931), Washington, pp. 25-32, ills.

Brandt, Richard. Untersuchung über die Erregung von Drehschwingungen in Reihenmotoren.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 343-357, ills., diagrs., tabls.

Brant. The Brant "Scud" intermediate glider.

Flight, No. 1154, Bol. 23, No. 6 (Feb. 6,1931), London, pp. 112-113, ills.

Bratt, K. A. See Inter-parliamentary Union: What would be the character of a new war? Enquiry organised by the Inter-parliamentary Union.

Bratjn. The Braun relative altitude meter.

Flight, No. 1191, Vol. 23, No. 43 (Oct. 23, 1931), London, p. 1063, ills.

Braunschweig. See Hoeck, James: Braunschweig cradle of German aviation.

Brazil. The Regia Aeronautica in Brazil.

Aeroplane, Vol. 40, No. 3 (Jan. 21,1931), London, p. 98.

Breakaway. See Green, J. J.: Breakaway of boundary layer on a cylinder and an airfoil.

Breaking tests. See Hertel, Heinrich: Dynamische Bruchversuche mit Flugzeugbauteilen.

Breckenridge, F. C. Transmission of light through fog. An attempt to correlate the results of six investigations made in U.S.A. in recent years. Aircraft Engineering, Vol. 3, No. 32 (Oct. 1931), London, pp. 261-264, diagrs.

Breda works. See Allen, B. S.: A flying visit to Italy. The Breda works.

Bree, J. de. Het Jumbo-vrachtvliegtuig der K.L.M.

Het Vliegveld, 15de Jaarg., No. 5 (Mei 1931), Amsterdam, pp. 156-158, ills.

Breguet. Breguet military airplane, Type 33. A two-place long-distance sesquiplane for observation and bombing.

National Advisory Committee for Aeronautics, Aircraft Circulars No. 151, Sept. 25, 1931, Washington, September 1931, pp. 16, ills.

- Breguet 390 T commercial airplane (French). A ten-seat all-steel sesquiplane.

National Advisory Committee for Aeronautics, Aircraft Circulars No. 149, Aug. 11, 1931, Washington, August 1931, pp. 4, ills.

Bréguet. Stan samolotu Bréguet XIX Nr. 60.3 po odbytym locie Warszawa-Tokio- Warszawa.

Instytut Badan Technicznych Lotnictwa, Sprawozdania i Prace, Warszawa, 1926, pp. 5-15, ills., tabls.

Bréguet, Louis. Aérotechnique. Suspension aérodynamique du véhicule aérien.

G. R. Acad. Sei., T. 193, No. 21 (23 iiov. 1931), Paris, pp. 994-996.

- Airships big as steamships tomorrow.

The Sunday Star (Magazine), July 26, 1931, Washington, pp. 5, 19.

Breithaupt, A. D. Methods of maintaining the equilibrium of airships.

Aeroplane, Vol. 40, No. 14 (April 8, 1931), London, pp. 603-604, 606, ills.

Breithaupt, J. Vorteile des Luftschiffs als Verkehrsmittel auf Groesstentfer-nungen.

Schiffbau, Bd. 2, Nr. 10 (15. Mai 1931), Berlin, pp. 238-242, ill.

Bremer, Wainö. See Vitt, Leonard: Flygarprofiler Kapten Wäinö Bremer.

Brennan, J. F. A method of determining the altitude in the atmosphere above sea level where the freezing point of water occurs.

Monthly Weather Review, Vol. 59, No. 2 (Feb. 1931), Washington, p. 75, ills.

Brenner, Paul. Baustoffragen bei der Konstruktion von Flugzeugen.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 21. Heft (14. Nov. 1931), München und Berlin pp. 637-648, ills., diagrs., tabls.

- Ergebnisse von Korrosions- und Oberflächen-schutzversuchen mit Aluminium-Walzlegierungen.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V. München und Berlin, 1931, pp. 505-520, ills., diagrs., tabls.

- Korrosionsversuche mit Duralplat-Nietverbindungen.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 11. Heft (15. Juni 1931), München und Berlin, pp. 344-346, ills.

Bridgeman, O. C., C. A. Ross and H. S. White. Airplane fuel-line temperature.

Journ. Soc. Automotive Engineers, Vol.'29, No. 2 (Aug. 1931), New York, pp. 121-125, ills.

Bridgeman, Leonard. Britain's representatives.

Aeroplane, Vol. 41, No. 11 (Sept. 9, 1931), London, pp. 624-630, ills. Schneider trophy.

- See Grey, Charles Grey, and Leonhard Bridgeman: All the world's aircraft 1930.

Briggs, J. C. Modern engine production.

Aircraft Engineering, Vol. 3, No. 26 (April 1931), London, pp. 80-86.

Briggs, Lyman James, and H. L. Dryden. Aerodynamic characteristics of circular-arc airfoils at high speeds.

National Advisory Committee for Aeronautics, Report No. 365, Jan. 12, 1931, Washington, U.S. Government Printing Office, 1930, pp. 14, ills., diagrs., tabl.

Briggs, Lyman James. Present status of aircraft instruments. Report prepared by the subcommittee on instruments.

National Advisory Committee for Aeronautics, Report No. 371, Jan. 31, 1931, Washington, U.S. Government Printing Office, 1930, [1931], pp. 26.

Brinkley, Russ. Create a demand—then sell.

Airway Age, Vol. 13, No. 1 (July 4, 1931), New York, pp. 53-54.

Brintzinger, Wilhelm, Paul v. Handel und Heinrich Viehmann. Erschütterungsstörungen bei ortbeweglichen Empfängern.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 633-644, ills., diagrs.

Bristol. Bristol type 118 general purposes aircraft.

Flight, No. 1197, Vol. 23, No. 49 (Dec. 4,1931), London, pp. 1185-1187, ills.

- See Clark, K. W.: The motions, at a stall, of a Bristol fighter aeroplane

with slot and aileron control on both planes.

- See Fedden, A.H.E.: A memorandum on the design and development of

the Bristol Mercury 1927 Schneider Trophy racing engine.

- See Halliday, A. S., and C. H. Bürge: Lateral stability calculations for

the Bristol fighter aeroplane.

- See Halliday, A. S.: Stability derivatives of the Bristol fighter.

- See Ormerod, A.: Full scale measurements of lift coefficients of a Bristol

fighter with R.A.F. 34 wings and slots.

British Arctic Air Route Expedition. The British Arctic Air Route Expedition.

The Geographical Journal, Vols. 77, 78, No. 6, 3 (June, Sept. 1931), London, p. 291, 551-554.

British Standards Institution. British Standards Institution. Aircraft Engineering, Vol. 3, No. 34 (Dec. 1931), London, p. 312.

Brockett, Paul. Bibliography of aeronautics 1929.

National Advisory Committee for Aeronautics, Washington, United States Government Printing office, 1930, pp. vi, 242.

Broeze, J. J. See Boerlage, G. D., and J. J. Broeze: The ignition quality of fuels in compression-ignition engines.

Brown, Charles G. Torsional rigidity in cantilever wings.

Aviation Engineering, Vol. 5, No. 5 (Dec. 1931), Washington, N.J., pp. 11-14, Uls., diagrs.

Brown, D. Maclean. Inspection of wiring plate angles.

Aircraft Engineer, Flight Engineering Section, Suppl. to No. 1196, Vol. 23, No. 48 (Nov. 27, 1931), London, p. 1174e, (85).

Brown, George Granger. The volatility of motor fuels.

Engineering Research Bulletin, No. 14, May 1930, Department of Engineering Research, University of Michigan, Ann Arbor.

Brown, Thad H. State regulation of radio.

Journal of Air Law, Vol. 2, No. 1 (Jan. 1931), Chicago, pp. 35-37.

Brown, Walter F. Glancing back at 1930. Mail by air.

Western Flying, Vol. 9, No. 1 (Jan. 1931), Los Angeles, Calif., p. 40.

- See Manning, George H.: Mr. Brown sharpens his pencil and cuts the

air mail rates.

Brownback. Brownback "Bumble Bee" three cylinder light aircraft engine is air cooled.

Automotive Ind., Vo. 65, No. 2 (July 1931), New York, p. 49, ill.

Brownback, Henry Lowe. Simplicity in light plane engine design.

Aviation Engineering, Vol. 5, No. 4 (Nov. 1931), Washington, N.J., pp. 23-25, ills.

Bruce, Mildred Mary Easter (Petre), "Hon. Mrs. Victor Bruce". The Bluebird's flight.

London, Chapman & Hall, ltd., 1931, pp. xn, 292, ills., maps. Foreword by Colonel the Master of Semphill.

Bryant, L. W., and D. H. Williams. The application of the method of operators, to the calculation of the disturbed motion of an aeroplane.

Aer. Res. Comm., Rep. Mem., No. 1346 (Ae. 478-T. 2992), July 1930, London, 1931, pp. 13.

Bryant, L. W., and A. S. Halliday. Measurement of lateral derivatives of the whirling arm.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 736-741 diagrs. Rep. Mem. No. 1249. (Ae. 400.)

Bryant, L. W. Note on change of wind with height.

Aer. Res. Comm., Rep. Mem., No. 1407 (Ae. 528-T. 3045a), March 1931, London, 1931, pp. 8, diagrs., tabls.

Bucharest. Wind tunnel of the Bucharest Polytechnic Institute.

National Advisory Committee for Aeronatuics, Technical Memorandums No. 651, Dec. 17,1931, Washington, December 1931, pp. 2, ills.

- See Fédération Aéronautique Internationale: Conférence de Bucarest du

6 au 14 juin 1931.

- See Fédération Aéronautique Internationale: Conférence de Bucarest du

8 au 15 juin 1931.

- See Fédération Aéronautique Internationale: De F.A.I.-conferentie te

Bucarest.

Buck, Robert. Burning up the sky.

New York, London, Q. P. Putnam's Sons, 1931, pp. ix, 178, ills.

Buckels. See Hertel, Heinrich: Steifigkeit, Festigkeit und Beanspruchung von Anschnallgurten und Sesseln.

Buckling Problem. See Sezawa, Katsutada, and Kei Kubo: The buckling of a cylinder shell under torsion.

- See Sezawa, Katsutada: On the buckling under edge thrusts of a rectangular plate clamped at four edges.

Budgets. See B., H.: Les budgets aéronautiques.

- See Beck, Waldemar C.-A.: Le budget aéronautique allemand pour 1931.

- See Germany: Der Deutsche Lufthaushalt 1931.

- See Great Britain: Air estimates.

Budig, F. La stabilisation marine des hydravions par plans de dérive. L'Aérophile 39e année, No. 7 (15 juil. 1931), Paris, pp. 209-210, ills.

BuDWiG, Gilbert. Airworthiness requirements for certificate for export. Aero digest, Vol. 18, No. 4 (April 1931), New York, pp. 46-47.

Buenos Aires. The British aircraft industry at Buenos Aires. * Aeroplane, Vol. 40, No. 9 (March 4, 1931), London, p. 366.

- The British Empire exhibition, Buenos Aires, 1931.

Aeroplane, Vol. 40, No. 14 (April 8, 1931), London, pp. 615-616, 618, ills.

- British Empire trade exhibition, Buenos Aires, 1931.

Flight, No. 1153, Vol. 23, No. 5, 11 (Jan. 30, March 13, 1931), London, pp. 91, 221-225, ills.

- The Buenos Aires exhibition.

Aeroplane, Vol. 40, No. 11 (March 18, 1931) London, pp. 452, 454, ills.

Buenos Aires. The Prince opens the exhibition.

Flight, No. 1160, Vol. 23, No. 12 (March 20, 1931) London, p. 245, ill.

Buffalo. Developing the Buffalo municipal airport.

Airway Age, Vol. 12, No. 10 (Jun. 6,1931), New York, pp. 583-585, ills.

Buffeting. A fresh phenomenon. The importance to be attached to buffeting. Aircraft Engineering, Vol. 3, No. 24 (Feb. 1931), London, pp. 25-26.

- The phenomenon of "Buffeting."

Aircraft Engineering, Vol. 3, No. 24 (Feb. 1931), London, pp. 31-34.

Bulgaria. Bulgarien. Sperrgebiete.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 45-46 (14 Nov. 1931), Berlin, pp. 332-334, map.

Bulman, G. P. Engines at the Paris Aero show. Reflections on the state of continental engine development and practice, as exemplified by the exhibits. Aircraft Engineering, Vol. 3, No. 23 (Jan. 1931), London, pp. 9-11, ills.

Buoyancy. See Lötz, Irmgard: Berechnung der Auftriebsverteilung beliebig geformter Flügel.

- See Töpfer, Carl: Auftriebsverteilung und Längsstabilität.

Bureau of Standards. See Blee, Harry H.: Protección de hangares de aeroplanos. Resumen del informe del comité de investigaciones sobre el control de hangares para aeroplanos por applicación automática del agua.

Bürge, Cyril G. Handbook of aeronautics; a compendium of the modern practice of aeronautical engineering, containing over 500 graphs and diagrams, tables and formulae for the aeronautical engineer; published under the authority of the Council of the Royal Aeronautical Society. London, Gale & Polden, ltd., [1931], pp. xvi, 703, ills., diagrs., tables.

Bürge, C. H. See Halliday, A. S., and C. H. Bürge: Lateral stability calculations for the Bristol fighter aeroplane.

Burgers, J. M. Hitzdrahtmessungen.

"Wien, W., und F. Harms: Handbuch der Experimentalphysik, Bd. 4,1. Teil. Hydro- und aerodynamik, Leipzig, Akademische Verlagsgesellschaft m.b.H., 1931, pp. 635667, ills.

Burgess, C. P. Water-recovery apparatus for airships.

Mech. Eng., Vol. 53, No. 7 (July 1931), New York, pp. 529-530.

Burnelli. See Wertenson, F.: Development of the High-speed Burnelli type monoplane.

- See Wertenson, F.: Investigation and development of the Burnelli type

airplane.

- See Wertenson, F.: Investigation of the Burnelli type airplane.

Burtis, Thomson. Slim Evans, air ranger.

New York, H. Holt and Company, 1931, pp. 222.

Busemann, A. Gasdynamik.

Wien, W., und F. Harms: Handbuch der Experimentalphysik, Bd. 4,1. Teil. Hydro- und aerodynamik, Leipzig, Akademische Verlagsgesellschaft m.b.H., 1931, pp. 341-460, ills., diagrs.

Butterworth, William. National conference on uniform aeronautic regulatory laws. Importance of uniform aeronautic regulatory laws to American commerce and industry.

Air Law Eeview, Vol. 2, No. 1 (Jan. 1931), New York, pp. 60-64.

Buzzard, R. W., and W. H. Mutchler. Advantages of oxide films as bases for aluminum pigmented surface coating for aluminum alloys.

National Advisory Committee for Aeronautics, Technical Notes No. 400, Nov. 24, 1931, Washington, November 1931, pp. 16, ills., diagrs.

69261—35-4

Bylewski, Jerzy. Badanie fal krötkich przeprowadzone przez Instytut Badan Technicznych Lotnictwa wspölnie z Instytutem Radjotechnicznym.

Instytut Badan Techniczych Lotnictwa, Sprawozdanie kwartalne Nr. 2, Warszawa, 1930, pp. 13-24, diagrs.

- Druga serja badan fal krötkich, przeprowadzona przez Instytut Badan

Technicznych Lotnictwa wspölnie z Instytutem Radjotechnicznym.

Instytut Badan Technicznych Lotnictwa, Sprawozdanie kwartalne, Nr. 3, Warszawa, 1930, pp. 32-35, ills.

- See Sokolcow, Dymitry, i Jerzy Bylewski: Wyniki 2 serji badan nad

rozchodzeniem sie. fal krötkich.

Byoir, Carl. Graphic facts about aviation. March 1, 1931. Compiled by Carl Byoir and associates.

New York, 1931, pp. 27, ills., diagrs., map.

Byrd, Richard Evelyn. Flieger über dem sechsten Erdteil. Meine Südpolexpedition 1928/30.

Leipzig, Verlag F. A. Brockhaus, 1931, pp. 280, ills.

- Little America: Aerial exploration in the Antarctic and the flight to the

South Pole.

London, G. P. Putnam's Sons, 1931, pp. xvi, 422, ills.

- See Shaffer, Ernst: Glück ab; bahnbrecher der lüfte.

C

C.A.M.S. The C.A.M.S. 60 seaplane (French). A twin-engine bombing and torpedo monoplane.

National Advisory Committee for Aeronautics, Aircraft Circulars No. 141, March 31, 1931, Washington, April 1931, pp. 8, ills.

Cabin. See Gough, Melvin N.: The variation in pressure in the cabin of an airplane in flight.

Cacopardo, Salvatore. The collective aeronautical conventions and the possibility of their unification.

Air Law Review, Vol. 2, No. 2 (April 1931), New York, pp. 207-216.

Caldwell, Cy. Aerial invasion of the United States.

Aero Digest, Vol. 18, No. 3 (March 1931), New York, pp. 40-41,132-140, map.

- Campaigners aloft.

Aero Digest, Vol. 19, No. 1 (July 1931), New York, pp. 44-46,122, ills.

- Evolution of the Pilot.

Aero Digest, Vol. 18, No. 4 (April 1931), New York, pp. 42-43, 240, ills.

- "Gangway for Moses."

Aero Digest, Vol. 18, No. 1 (Jan. 1931), New York, pp. 48,134.

Caldwell, Frank W. Aspects of airscrew design.

Aircraft Engineering, Vol. 3, No. 31 (Sept. 1931), London, p. 215.

- Care of the detachable-blade, metal propeller.

Aviation, Vol. 30, No. 6 (June 1931), New York, pp. 357-359, ills., tabls.

Calembert, Baron Louis de. Nungesser—as I knew him.

Western Flying, Vol. 9, No. 2 (Feb. 1931), Los Angeles, Calif., pp. 41-43, ill., port.

California. Report of the Joint Legislative Committee on Aviation. Presented to Governor C. C. Young, December 31, 1930, pursuant to Assembly concurrent resolution No. 9.

Sacramento, California State Printing Office, 1931, pp. 11.

Roy Bishop, Chairman.

- See Little, Delbert M.: Some effects of California mountain barriers on

upper air winds and sea-level isobars.

- See United States Congress. Senate. Committee on Naval Affairs:

Authorizing the Secretary of the Navy to accept a lighter-than-air base, and to construct necessary improvements thereon . . . Report to accompany H.R. 6810.

Callen, C. See Perring, W. G. A., and C. Callen: The influence of a stopped airscrew on the lift and drag of an aerofoil.

- See Perring, W. G. A., and C. Callen: Moments and forces on a yawed

model aeroplane.

- See Perring, W. G. A., and C. Callen: Validity of large scale tests in an

open jet wind tunnel.

Cambridge University. Cambridge University air squadron.

Flight, No. 1176, Vol. 23, No. 28 (July 10, 1931), London, pp. 674-676, ills.

Camichel, C, et P. Dupin. Hydrodynamique.—Sur les divers modes de construction des filets a l'entrée d'un ajutage.

C. R. Acad. Sci., T. 193, No. 2 (15. juil. 1931), Paris, pp. 102-103, ills.

Camm, F. J. Model aeroplanes and airships, with special chapters on gliders, helicopters, wing-flapping models, kites, and full-size gliding. London, G. Newnes, ltd., 1931, pp. 96, ills., diagrs.

Campbell, H. A. Applications of electricity in aircraft.

Aviation Engineering, Vol. 5, No. 4 (Nov. 1931), Washington, N.J., pp. 13-17, ills., diagrs. tabls.

Canada. Air transport in northern Canada.

Aeroplane, Vol. 41, No. 20 (Nov. 11,1931), London, pp. 1123-1130, ills.

- Canadian aviation.

Aviation, Vol. 30, No. 3 (March 1931), New York, pp. 166-167, diagrs., tabls.

- Exchange of notes (August 29, and October 22, 1929) recording an agreement between Canada and the United States of America regarding the admission of civil aircraft, the issuance of pilots' licences and the acceptance of certificates of airworthiness for aircraft imported as merchandise.

Ottawa, F. A. Acland, Printer to the King, 1930, pp. 5. Treaty Series, 1929, No. 13.

- Exchange of notes between His Majesty's government in Canada and the

United States government regarding civil aircraft. Washington, August 29/ October 22, 1929.

London, H. M. Stationery Office, 1931, pp. 5. Great Britain, Foreign Office. Treaty Series, 1931, No. 8. Reprint of Canadian Treaty Series No. 13, 1929.

- Notes on aerodrome development for airports, private and intermediate,

seaplane ports and seaplane anchorages in Canada. Published by the Department of National Defence, Civil aviation branch to facilitate a standard development.

Ottawa, F. A. Acland, Printer to the King, 1931, pp. 66, ills., tabls.

- The Puss Moth in Canada.

Flight, No. 1149, Vol. 23, No. 1 (Jan. 2,1931), London, pp. 8-9, ills.

Canada. Quarterly Civil Air Liaison Letter Nos. 14-17.

Department of National Defence, Civil Aviation Branch, 31st March, 30th June, 30th September, and 31st December 1931 (mimeographed), Ottawa, pp. 8, 6, 25, 7.

- Report on civil aviation and civil government air operations for the year

1930.

Dominion of Canada, Department of National Defence, Ottawa, 1931, pp. 77, ills., tabls., map.

- See Claxton, Brooke: Legislative control of radio in Canada.

- See Drew, George Alexander: Canada's fighting airmen.

- See Hanson, Earl: Canadian Aviation—1930.

- See Latchford, Stephen: Aviation relations between the United States

and Canada prior to negotiation of the air navigation arrangement of 1929.

- See Montagnes, James: Air-mapping the Canadian Northland.

- See Montagnes, James: Canada's aviation industry.

- See Norway, N. S.: R. 100 Canadian flight 1930. Journal written on

board the ship. Nothing has been added.

- See Reid, T. M.: Winter flying in northern Canada.

- See Steel, W. A.: Communication on civil airways in Canada.

- See United States: Arrangement effected by exchange of notes between

the United States and the Dominion of Canada. Admission of civil aircraft, the issuance of pilots' licenses and the acceptance of certificates of air worthiness for aircraft imported as merchandise. Signed August 29, 1929, and October 22, 1929.

Canal. See Canal: Canal surveying from the air.

Canard. See Focke, H.: Le principe du "canard" et ses avantages.

- See Heinze, Edwin P. A.: Focke-Wulf canard monoplane.

- See Margoulis, W.: Le prix de la stability longitudinale de l'avion et du

"canard."

Cannegieter, H. G. Het Internationale Pooljaar 1932-1933.

Het Vliegveld, 15de Jaarg., No. 10 (Oct. 1931), Amsterdam, pp. 346-347.

- Passagiersvaart van den ballon "Hollandia" te Oosterbeek op 16 Mei.

Het Vliegveld, 15de Jaarg., No. 6 (Juni 1931), Amsterdam, p. 210.

Cantilever. See Abit, Edmond: L'interaction des longerons dans les ailes cantilever.

- See Bernard: The Bernard 80 G. R. long-distance airplane (French).

A two-place cantilever monoplane.

- See Dewoitine: The Dewoitine D. 30 commercial airplane (French). A

high-wing cantilever monoplane.

- See Dewoitine: Dewoitine D 33 commercial airplane (French). A low-wing cantilever monoplane.

- See I. A. R.: The "I. A. R." pursuit airplane (Roumanian). A one-place

cantilever low-wing monoplane.

Cantilever. See S. P. C. A.: The S. P. C. A. 40 T commercial airplane (French). An all-metal cantilever monoplane.

- See Wibault: The Wibault 280 T. 10 commercial airplane (French).

An all-metal, cantilever, low-wing monoplane.

Cantoni, Alberto. L'aviazione civile e la difesa nazionale. Riv. Aer., Vol. 7, N. 1 (gen. 1931), Roma, pp. 38-48.

Capetti, Antonio. Il motore leggero ad olio pesante.

L'Aerotecnica, Voi. 11, N. 12 (Die. 1931), Roma, pp. 1495-1505.

- Ricerche sperimentali sull'uso di miscele diluite e di miscelle fortemente

preriscaldate nei motori a carburazione.

L'Aerotecnica, Voi. 11, n. 3 (marzo 1931), Roma, pp. 255-268, diagrs. English abstract pp. 388-389.

- Sul calcolo dei periodi di oscillazione torsionale libera degli alberi.

L'Aerotecnica, Voi. 11, n. 2 (Feb. 1931), Roma, pp. 157-166, digars. English abstract pp. 249-250.

Capon, R. S. Part I.—A method of calculating suitable airscrew characteristics to moet given conditions. The resulting airscrew performance. Part II.—A comparison of the observed change of performance consequent on a change of airscrew and the change predicted by the methods of Part I.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 460-503, diagrs., tabls. Rep. Mem. No. 1254. (Ae. 403.)

Caproni. The Caproni 90 P.B. Italy's giant bomber.

Flight, No. 1150, Vol. 23, No. 2 (Jan. 9,1931), London, pp. 27-28, ills.

- See Barbero, T. L.: I cento aeroplani Caproni, 1909-1931.

Caproni, Guasti Timina, e A. Bartarelli. Francesco Zambeccari aeronauta; Bologna 1752-1812.

Milano, Museo Caproni Bergamo, Istituto it. d'arti grafiche, 1931, pp. 125, ill.

Caracciolo, Mariano Moreno. See Toussaint, A.: La aviación actual. Versión española de Mariano Moreno Caracciolo.

Carburation. See Capetti, A.: Ricerche sperimentali sull'uso di miscele diluite e di miscelle fortemente preriscaldate nei motori a carburazione.

Carburetors. A watch-dog for the carbureter.

Scient. Amer., Voi. 144, No. 2 (Feb. 1931), New York, pp. 92-93, ills.

- See Clothier, W. C: Carburetter fuel metering characteristics.

- See Jacunski, Juljan: Przyrzad do cechowania dysz gaznikow.

- See Scheubel, F. N.: On atomization in carburetors.

—— See Schey, Osca William, and Vern G. Rollin: The effect of increased carburetor pressure on engine performance at several compressed ratios.

Carganico, Victor. Kurzer Bericht über die Geschäftliche Sitzung der XX. Ordentlichen Mitglieder-Versammlung der Wissenschaftlichen Gesellschaft für Luftfahrt E. V. (WGL) am 20. Mai 1931, 9 Uhr, in der Aula der Universität Kiel.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 13. Heft (14. Juli 1931), München und Berlin, pp. 389-393.

Carriers. Deck flying.

Aeroplane, Vol. 40, No. 4 (Jan. 28,1931), London, pp. 157-162, ills.

Carriers. Dek-vliegen.

Het Vliegveld, 15de Jaarg., No. 4, 5 (April, Mei 1931), Amsterdam, pp. 137-141,169-175, ills.

- A submarine aircraft carrier.

Flight, No. 1179, Vol. 23, No. 31 (July 31,1931), London, pp. 759-763, ills.

- See Acland, W. R. D.: Deck flying.

- See Boone, Andrew R.: From carrier decks.

- See K., A.: A submarine aircraft carrier.

Carson, James E. A sea story awaiting a Conrad.

U.S. Air Services, Vol. 16, No. 12 (Dec. 1931), Washington, D.C., pp. 26-27, ill.

Carter, B. C, and N. S. Muir. Torsional vibration of crankshafts. Beard-more "Tornado" airship engine investigations.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 1049-1103, diagrs., Rep. Mem. No. 1303. (E. 39.)

Carter, Lane. When our wings began to sprout.

The Washington Post (Magazine), July 19,1931, Washington, pp. 4,15, ills port.

Carter, W. G. Notes and comments on the design of "The Crusader." Part I. Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, 1931, pp. 318-319.

Carus-verlag, Berlin. Eine chronik des flug-gedankens bis zum luftverkehr im dienste der Völkerverbindung.

Berlin, Verlag Licht und Schatten, 1930, pp. 138, ills. maps.

Caspari, W. Ergebnisse des internationalen Kongresses für Flugsicherheit.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 11. Heft (15. Juni 1931), Müchen und Berlin, p. 334.

Cassens, J. Gewichtsermittlung der wichtigsten einfachen Träger.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 15. Heft (14. Aug. 1931), München und Berlin, pp. 456-463, ills., diagrs.

- Systematischer Gewichtsvergleich an räumlichen Fachwerken.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 12. Heft (29. Juni 1931), München und Berlin, pp. 357-362, ills., tabls.

Cassidy, Louis C. Does the Havana aerial convention fulfill a need?

Air law Review, Vol. 2, No. 1 (Jan. 1931), New York, pp. 39-43.

Cassinis, G. Ricerche sul metodo aerofotogrammetrico Nistri. L'Aerotecnica, Voi. 11, N. 10 (ott. 1931), Roma, pp. 1241-1248.

Cassone, Ferdinando. Il potere aereo.

Riv. Aer., Anno 7, N. 8 (agosto 1931), Roma, pp. 187-222, diagrs.

Castagna, A. Prove su radiatori per motori di aviazione.

L'Aeronautica, Voi. 11, N. 2 (feb. 1931), Roma, pp. 167-182, ills., diagrs. English abstract pp. 250-251.

Catapults. Aircraft catapults. Scottish firm markets two successful types. Flight, No. 1157, Vol. 23, No. 9 (Feb. 27,1931), London, pp. 177-179, ills.

- Catapult launching for aeroplanes.

Aeronautical Engineering, suppl. to the Aeroplane, Vol. 40, No. 8 (Feb. 25, 1931), London, pp. 327-328, 330, 332, ills.

- Catapulte per il lancio de velivoli.

Riv. Aer., Anno 7, n. 7 (luglio 1931), Roma, pp. 106-119, ills.

- Catapulting a "Virginia."

Flight, No. 1170, Voi. 23, No. 22 (May 29,1931), London, pp. 469-471, ills.

Catapults. See Baumhauer, A. G. von: Vergadering van de W.G.L. te Kiel.

- See Cuthill, R. W., and H. S. Hinchman: History and commercial value

of the airplane launching catapult.

- See Forza, Ernesto: Catapultamento di velivoli da nave in mare ondoso.

- See Heinkel, Ernst, flugzeugwerke, g.m.b.h.: Katapulte und katapultieren

von flugzeugen.

- See Schwarzler, Karl: Flugzeugkatapulte. Allgemeines, Berechnungen

und Messungen.

- See Wackett, L. J.: Launching by catapult.

Caunter, C. F. Light aero engines.

New York, Isaac Pitman & Sons, 1931, pp. 277.

Caygill, L. E. See Harris, R. G., and L. E. Caygill: Model tests on Super-marine S. 4 seaplane. Effect of lowering wing.

- See Harris, R. G., L. E. Caygill, and R. A. Fairthorne: Wind tunnel experiments on steam condensing radiators.

- See Harris, R. G., L. E. Caygill, and R. A. Fairthorne: Wind tunnel tests

on Gloster and Supermarine wing radiators.

Ceiling. See Diehl, Walter Stuart: A new chart for estimating the absolute ceiling of an airplane.

Celler, Frederic. Landing blind.

Aviation, Vol. 30, No. 12 (Dec. 1931), New York, pp. 699-700, ills.

Central America. Air transport in Central America.

Aeroplane, Vol. 40, No. 5 (Feb. 4,1931), London, pp. 201-202, ills.

Central Flying School. See Robertson, F. A. de V.: The Central Flying School.

Centrifugal pumps. See Spannhake, W.: Kreiselpumpen und Turbinen.

Cesar. Englandflug des deutschen Luftfahrtverbandes.

Luftschau, 4. Jahrg., Nr. 10 (24. Mai 1931), Berlin, p. 73.

- Fragen des Tages.

Luftschau, 4. Jahrg., Nr. 16, 17 (24. Aug., 10. Sept. 1931), Berlin, pp. 40-41, 49.

- Marga v. Etzdorf erzählt. . .

Luftschau, 4. Jahrg., Nr. 1 (10. Jan. 1931), Berlin, p. 3.

Cesar, Wolfgang.

Auf dem Augsburger Luftfahrertag.

Luftschau, 4. Jahrg., Nr. 14 (24. Juli 1931), Berlin, pp. 13-14.

- Erster Berliner Flachlandsegelflugtag.

Luftschau, 4. Jahrg., Nr. 13 (10. Juli 1931), Berlin, pp. 8-9.

- Fragen des Tages.

Luftschau, 4. Jahrg., Nr. 1 (10. Jan. 1931), Berlin, p. 2.

Challenge de Tourisme. Challenge international de tourisme aérien 1930. Bull. Féd. Aér. int., 12e année, No. 44 (Jan. 1931), Paris, pp. 17-20, tabls.

Chambers, C. M. F, See Amphibian: A diminuitive amphibian.

Changeux. Dynamique du dirigeable.

1931, pp. 103, ills.

Charcot, Jean. Rapport du Dr. Jean Charcot sur le travail du Commandant Voitoux "La navigation aérienne transatlantique." CR. Acad. Sei., T. 193, No. 24 (14 dec. 1931), Paris, p. 1244.

- Rapport du Dr. Jean Charcot sur les tables de navigation du Commandant

Ch. Bertin.

CR. Acad. Sei., T. 193, No. 24 (14 dec. 1931), Paris, pp. 1243-1244.

Charles, Don. The costs of flying your own plane.

National Glider and Airplane News, Vol. 3, No. 2 (Sept. 1931), New York, pp. 17, 69, ills:

Charlestop. See L., P.: Les nouveaux systèmes Charlestop de transmission et de freinage.

- See Léglise, Pierre: The new "Charlestop" remote brake transmission and

control.

Chase, John Samson, and Nolie Mumet. Physical requirements for commercial flyers.

Denver, The Clason Publishing Co., 1931, pp. 31, ills., diagrs.

Chemical warfare. See Ferretti, Virgilio: La guerra chimica e la difesa della popolazione civile.

Chenoweth, Opie. Engines in 1930.

Airway Age, Vol. 12, No. 1 (Jan. 1931), New York, pp. 44-46, ills.

Chicago. The brain of the airport.

Chicago, Uniform airport control system, 1931, pp. 16, ills.

Chilton, R. Air-cooled cylinder-head design.

Journ. Soc. Automotive Engineers, Vol. 29, No. 3 (Sept. 1931), New York, pp. 185-189, 189-191, 227, ill.

Chile. Chile. Zollflughäfen.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 13-14 (4. April 1931), Berlin, p. 92.

China. See Hartmann, H.: Deutsches Luftbildunternehmen in China.

- See Jones, W. E. F.: Aircraft in China.

- See Lin, Wo-chiang: The development of aviation and aeronautical law

in China.

Chitty, Letitia, and R. V. Southwell. A contribution to the analysis of primary stresses in the hull of a rigid airship.

Journ. Roy. Aer. Soc, Vol. 35, No. 252 (Dec. 1931), London, pp. 1103-1130, diagrs., tabls.

Chitty, Letitia. See Southwell, R. V., and Letitia Chitty: On the problem of hydrodynamic stability.—I. Uniform shearing motion in a viscous fluid.

Christian, Manfred. A pioneer inverted engine. The Argus "As 8", fully described and illustrated with drawings and a power curve. Aircraft Engineering, Vol. 3, No. 24 (Feb. 1931), London, pp. 29-30, ills.

- Rückblick auf die Motorenschau des 12. Pariser Salons, Dezember 1930,

Zeitschr. Flugt. Motorluftsch., 22 Jahrg., 6. Heft (28 März 1931), München und Berlin, pp. 162-166, ills., diagr., tabl.

Church, Earl Frank. Methods of eliminating ground surveying for control in aerial photographic mapping. 5th of a series. Syracuse, Syracuse University, 1931, pp. 64, diagrs.

Cierva, Juan de la. The autogiro.

Aeroplane, Vol. 41, No. 8 (Aug. 19, 1931), London, pp. 462-464.

Cierva, Juan de la, and Don Rose. Wings of tomorrow; the story of the autogiro.

New York, Brewer, Warren & Putnam, 1931, pp. 300, ills., diagrs.

Circling flight. See Mettam, H. A.: Meccanica semplice del volo circolare.

--flight. See Mettam, H. A.: Simple mechanics of circling flight.

Cirrus engines. See Thompson, James G.: Engine service and maintenance. Part VIII—Cirrus engines.

Cirrus-Hermes. See Handasyde, G. H.: Building light aeroplane engines. The design and manufacturing porcesses of the Cirrus-Hermes engines examined and described.

Civil aeronautics. See Schiavone, Michele: I servizi aerei civili. Studio sta-tistico-economico-giuridico.

- See United States Department of Commerce, Aeronautics Branch: Civil

aeronautics in the United States, July 1, 1931.

Civil aviation. Legislazione aeronautica estera. Fase. III. Polonia (1° supplemento). Fase. V. Belgio (1° supplemento): Fase. VIII. Impero Britannico (1° supplemento. Gran Bretagna). Fase. X. Grecia. Fase. XI. Stati Uniti di America. Fase. XII. Austria. (Ministero dell' aeronautica; aviazione civile e traffico aereo).

Roma, Istit. poligraf. dello Stato edit, tip., 1931, 6 voli, pp. vii, 25-143; 31-51; 86-149; 23; 75; 104.

- On the direction of civil aviation.

Aeroplane, Vol. 40, No. 1 (Jan. 7,1931), London, pp. 1-2, 4, ills.

- Statistica delle linee aeree civili italiane, anno 1930, IX (Ministero dell'

aeronautica; aviazione civile e traffico aereo).

Roma, Istituto poligr. Stato, Libreria edit, tip., 1931, pp. 326, ills.

- See Egypt: Civil aviation in Egypt.

- See Lamont, Robert: Glancing back at 1930. Civil aviation progress.

- See Van Zandt, J. Parker: Subsidizing civil aviation in Europe and

America.

Clark. See Alston, R. P.: Maximum lift coefficient of "Starling" with Clark YH wings.

Clark, K. W., and W. G. Jennings. Full scale determination of the motion of an Avrò aeroplane when stalled.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 832-837. diagrs. Rep. Mem. No. 1263. (Ae. 412.)

Clark, K. W. The motions, at the stall, of a Bristol fighter aeroplane with slot and aileron control on both planes.

Aer. Res. Comm., Rep. Mem., No. 1341 (Ae. 473-T. 2971), May 1930, London, 1931, pp. 7, diagrs., tabi.

Clark, K. W., and B. Lockspeiser. Wind tunnel tests on aerofoils at negative incidences.

Aer. Res. Comm., Rep. Mem., No. 1383 (Ae. 508-T. 3083), December 1930, London, 1931, pp. 8, diagrs., tabls.

Clark, K. W. See Bradfield, F. B., K. W. Clark, and R. A. Fairthorne: Maximum lift in closed and open jet tunnels.

- See Jones, E. T., and K. W. Clark: Full scale maximum lift coefficient of

R.A.F. 28 section wing.

Claudy, Carl Harry. Prize winners' book of model airplanes.

Indianapolis, The Bobbs-Merrill Company, 1931, pp. 242, ills., plans.

Claxton, Brooke. Legislative control of radio in Canada.

Air Law Review, Vol. 2, No. 4 (Nov. 1931), New York, pp. 439-454.

Clay, William C. See Theodorsen, Theodore and William C. Clay: Ice prevention on aircraft by means of engine exhaust heat and a technical study of heat transmission from a Clark Y airfoil.

- See Theodorsen, Theodore, and William C. Clay: The prevention of

ice formation on gasoline tank vents.

Cleary, Charles J. Fabrics in aviation. The characteristics and methods of testing of various textile materials examined and explained.

Aircraft Engineering, Vol. 3, No. 31 (Sept. 1931), London, pp. 228-229, 232, diagrs.

Clements, N. V. The show's the thing.

U.S. Air Services, Vol. 16, No. 3 (March 1931), Washington, pp. 32-34, ill.

Clephane, Douglas W. Light planes and 1931.

Airway Age, Vol. 12, No. 4 (Apr. 1931), New York, pp. 370-372.

- Selling the business plane.

Aviation, Vol. 30, No. 10 (Oct. 1931), New York, pp. 588-590, ills.

Clermont-Ferrand. The Clermont-Ferrand meeting.

Flight, No. 1177, Vol. 23, No. 29 (July 17,1931), London, pp. 697-698, ills.

Cleveland. Die grossen amerikanische Luftspiele in Cleveland. "National air Races 1931".

Luftschau, 4. Jahrg., Nr. 19 (10. Okt. 1931), Berlin, pp. 75-76, ill.

- National Races go to Cleveland.

Western Flying, Vol. 9, No. 1 (Jan. 1931), Los Angeles, Cal, p. 34.

- See National Air Races.

- See National Air Races: National Air Races at Cleveland this month.

Clothier, W. C. Carburetter fuel metering characteristics.

Aer. Res. Comm., Rep. Mem., No. 1361 (E. 43-I.C.E. 761, 790), December 1930, London, 1931, pp. 12, ills., diagrs.

Cloud hopping. See Schempp, Martin: Cloud hopping in soaring flight.

Clover, Willis H. The weather and the pilot.

Western Flying, Vol. 9, No. 2 (Feb. 1931), Los Angeles, Cal., pp. 32-35, ill., map.

Clubs. See Holme, John C: Aviation clubs in the colleges.

Coales, J. D. The range of aircraft. The effect of specific weight of power unit with special reference to Diesel engines.

Aircraft Engineering, Vol. 3, No. 25 (March 1931), London, pp. 61-62, diagr., tabl.

Cobham, Alan. Twenty-thousand miles in a flying-boat; my flight round Africa.

London, Calcutta and Sydney, George Harrap and Co., 1931, pp. 250.

Cochercano, Jean. Note sur le vol en piqué des avions.

L'Aérophile, 39e année, No. 3 (15 mars 1931), Paris, pp. 80-82, diagrs.

Cochran-Patrick, C. K. Aerial reconnaissance mapping in northern Rhodesia. Geographical Review, Vol. 31,1931, New York, pp. 213-220.

Cock, J. J Het vliegveld "West Schouwen"

Het Vliegveld, 15de Jaarg., No. 12 (Dec. 1931), Amsterdam, pp. 416-417, ills.

Cockburn, George Bertram. On a British pioneer.

Aeroplane, Vol. 40, No. 9 (March 4, 1931), London, pp. 353-354.

Cockpit equipment. The brain centre of a modern aircraft. Cockpit equipment of the "Balair" Fokkers.

Flight, No. 1151, Vol. 23, No. 3 (Jan. 16, 1931), London, p. 49, ill.

Coffin, Harold. Wings for Hawaii.

Nat. Aer. Mag., Vol. 9, No. 9 (Sept. 1931), Washington, pp. 9-12, ills.

Cogliolo, Pietro. Codice aeronautico, con appendici di aggiornamento a tutto il 1930.

Milano, U. Hoepli, 1931, pp. vii, 733. Seconda edizione.

Congressi e conferenze international!, bibliografie, riviste, corsi di diritto aereo. Diritto aeronautico con speciale riguardo alla legge italiana.

Legislazione italiana. Convenzione di Parigi 13 ottobre 1919. Leggi straniere. Materiale per una convenzione internazionale di diritto aereo privato.

Colby, Thomas B. Troubles with dope. How to prevent them.

Western Flying, Vol. 10, No. 5 (Nov. 1931), Los Angeles, Cai., pp. 26-28, port.

Colegrove, Kenneth. The international aviation policy of the United States.

Journal of Air Law, Vol. 2, No. 4 (Oct. 1931), Chicago, pp. 447-473.

- A survey of international aviation.

Journal of Air Law, Vol. 2, No. 1 (Jan. 1931), Chicago, pp. 1-23.

Colegrove, Kenneth W. International control of aviation. Boston, World peace Foundation, 1930, pp. 234.

Collar, A. R. See Lock, C. N. H., and A. R. Collar: Exploration of the flow near the screw proposed for the N.P.L. compressed air tunnel.

- See Williams, D. H., and A. R. Collar: Motion of H.M.A. R. 101 under

certain assumed conditions.

Collins. Collins aircraft annual. London, Collins, 1931.

Collins, A. R. A formula for the bouyancy of the wing floats of flying boats and single float seaplanes.

Aircraft Engineer, Flight Engineering Section, Suppl. to No. 1178, Vol. 23, No. 30 (July 24, 1931), London, pp. 726g-726h, (55-56), ill.

Collins, Paul F. Some points for economic operation.

Airway Age, Vol. 13, No. 14 (Oct. 3, 1931), New York, pp. 264-266.

Colors. See Fombeure, G.: L'altération du sens des couleurs.

Columba, Fausto. L'elica a passo variabile.

Riv. Aer., Anno 7, N. 2 (feb. 1931), Roma, pp. 282, diagrs.

Columbia. The Columbia Gorge.

Western Flying, Vol. 10, No. 1 (July 1931), Los Angeles, Cai., p. 71.

Combustion. See Schnauffer, Kurt: Untersuchung von Verbrennungsvorgàngen in Ztindmotoren mittels elektrischer Nessverfahren.

Comité Français de Propagande Aéronautique. Notice descriptive des appareils, primés au concours pour l'amélioration de la sécurité des groupes motopropulseurs d'aéronautique, organisé par le C.F.P.Aé. avec l'appui du Ministère de l'Air.

Paris, Comité Français de Propagande Aéronautique, 1931, pp. 48, ills., diagrs.

Commerce, Department of. See United States Department of Comerce.

Commercial aeronautics. Aeronautical finance.

Aviation, Vol. 30, No. 3 (March 1931), New York, pp. 163-164, diagrs.

- Foreign trade.

Aviation, Vol. 30, No. 3 (March 1931), New York, pp. 168-170, diagrs., tabls.

- Massnahmen zum Steigern der Reisegeschwindigkeit im Luftverkehr.

Zeitschr. Ver. deutscher Ing., Bd. 75, Nr. 44 (Okt. 1931), Berlin, p. 1364.

- The non-professional market.

Aviation, Vol. 30, No. 6 (June 1931), New York, pp. 350-352.

- Nonstop pickup and delivery of mail and express by airplane.

U.S. Air Services, Vol. 16, No. 10 (Oct. 1931), Washington, pp. 27-28.

- Pan American grows.

Airway Age, Vol. 12, No. 10 (June 6, 1931), New York, pp. 568-571, ills.

- Position vraie de l'industrie aéronautique dans le monde.

L'Aéronautique, 13me année, No. 148 (Sept. 1931), Paris, p. 310, diagrs.

- Production and licensing.

Aviation, Vol. 30, No. 3 (March 1931), New York, pp. 136-150, diagrs., tabls.

- Le statut de l'aviation marchande.

L'Aêrophile, 39e année, No. 8 (15 août 1931), Paris, p. 231.

- See Abrams, Monte C: Air express possibilities on the United States.

- See Bonifacio, F.: Aspetti tecnici, economici e politici del traffico aereo.

- See Bowen, R. Sidney, Jr.: Trends of the industry during 1930.

- See Bree, J. de: Het Jumbo-vrachtvliegtuig der K.L.M.

- See Central America: Air transport in Central America.

- See Clephane, Douglas W.: Selling the business plane.

- See Courtney, Frank T.: Flying versus transportation.

- See Dalissier, Alexis: Les transports aériens; étude économique; preface

de Laurent Eynac.

- See Davidson, Walter V.: The business of flying for business.

- See Deutsche Luft Hansa a.g.: Der luftf rächt verkehr; ein merkbuch für

den eilversand.

- See Ear hart, Amelia: Putting air travel into mass production.

- See Egypt: A flight into Egypt.

- See Erickson, Ed. L., and Walter B. Hawkins: Reduced-rate aircraft

merchandising.

- See France: Tendenze attuali dell' aviazione commerciale in Francia.

- See Gassner, A. A.: Transport planes for profit.

Commercial aeronautics. See Hayes, Robert: New use for planes.

- See International American Conference: Commercial aviation. Convention between the United States of America and other American republics. Signed at Habana, February 20, 1928.

- See Irwin, R. Randall: The problem of distribution.

- See Knauth, Arnold, W.: Federal airship foreign commerce bill.

- See Lake, Harley W.: Merchandising airport service.

- See Landis, William B.: The airplane in business.

- See Latchford, Stephen: Habana convention on commercial aviation.

- See Lawrance, Charles L.: Air transport. The air mail service—Its

development and cost.

- See Lawrance, Charles L.: Air transport. What it means to the manufacturer.

- See MacGregor, John D.: Development of Inter-American air transport.

- See Meyer, Willy: Verkehrsflieger berichten.

- See Moodie, Edmund L.: Reaching a private market with flying clubs.

- See Muller, Charles G.: Uses of aircraft in industry.

- See New York State: Laws affecting aviation of the State of New York.

Published by the New York State Commission on Aviation.

- See Osswald, Emmy: Zur rationalisierung der innerdeutschen handelsluftfahrt.

- See Peru: Commercial aviation in Peru.

- See Pritchard, Robert J.: Plane brokers.

- See Reid, Andrew: Merchandising needs.

- See Rohlfing, Charles Carroll: National regulation of aeronautics.

- See Savage, E. W.: Production and sales.

- See Sbernadori, Paolo: Commercial aviation in Italy.

- See Schenk, Heinz: Finanzierung und Organisation des Luftverkehrs.

- See Smith, Wesley Leland: Air transport operation.

- See Stapp, James Adair: Public altitude nights make busy airports.

- See Stewart, A. T.: Regional aviation conferences.

- See Trumbull, John H.: Meeting the challenge for sound cargo and passenger air transport service.

- See Wines, James P.: Selling air transport.

- See Woods, Ralph L.: The spreading wings of aviation means greater

sales.

- See Woods, Ralph L.: Unusual uses of airplanes.

Commercial aeronautics. See Wynne, John S.: Mercantile aviation.

- See Young, Clarence M.: Scheduled air transportation today is a sound

business endeavor.

Compasses. Deux nouvelles boussoles. Le télécompas Askania a transmission pneumatique. Le compas magnétique aéra 6 N B.

L'Aéronautique, 13me année, No. 147 (août 1931), Paris, pp. 303-304, ills.

- See Potter, Leslie S.: Compass swinging afloat.

- See Potter, Leslie S.: Compasses and their care.

- See Ramsey, Logan C: The pilot and his aircraft compass.

- See Ramsey, Logan C: The pilot and the compass error.

Condensers. See Muttray, H.: Widerstand und Kühlwirkung eines Flugzeugrumpfes mit verschieden angeordnetem Kühler.

Congo. See Crocker, H. E.: Air transport. A flying trip to the Belgian Congo.

Congrès International de Législation Aérienne. Neuvième Congrès international de législation aérienne du Comité Juridique international de l'Aviation, tenu à Budapest du 29 septembre au 3 octobre 1930.

Paris, Les Éditions Internationales, 1931, pp. 236.

9th Budapest, 1930.

Congrès International de la Navigation Aérienne. Cinquième Congrès International de la Navigation Aérienne. Organise sous les auspices du Gouvernement Néerlandais par l'Aéro-Club Royal des Pays-bas. La Haye, 1-6 septembre 1930.

La Haye, Martinus Nijhoff, 1931, Tome premier, pp. 874; Tome second, pp. 875-1741.

- Les communications techniques faites au Ve Congrès de la Haye.

L'Aéronautique, 13me année, No. 141, Bulletin L'Aérotechnique, 9e année, No. 98 (fév. 1931 Paris, p. 59.

Congrès International de la Sécurité Aérienne. Le premier Congrès international de la Sécurité aérienne.

L'Aérophile, 39e année, No. 1 (15 jan. 1931), Paris, pp. 3-6, ills.

Congrès National de l'Aéronautique Coloniale. Le congrès de l'aéronautique coloniale et l'aviation marchande internationale. L'Aéronautique, 13me année, No. 150 (nov. 1931), Paris, p. 374.

-Le congrès national d'aéronautique coloniale 5-10 octobre 1931.

L'Aérophile, 39* année, No. 11 (15 nov. 1931), Paris, pp. 323-325, ills.

Congresses. See Betaz, Baur de: Einiges über internationale Luftfahrtorganisationen und Konferenzen.

- See Caspari, W.: Ergebnisse des internationalen Kongresses für Flugsicherheit.

- See Piercy, N.A.V.: The fifth air congress. The report of the papers

read and discussions during the proceedings at the Hague.

- See Stockholm: Der dritte internationale Kongress für technische Mechanik

Stockholm 1930.

See Stockholm: Den första internationella säkerhets-kongressen.

Connecticut. Connecticut laws governing aeronautics. Revised to July 1, 1931. Office of Commissioner of Aeronautics, Hartford. Hartford, Service Press, inc., 1931, pp. 41.

- See Becker, Paul: Connecticut—an aviation leader. Rapid progress

made under state aeronautics department.

Connor, Harry P. Crossing the North Atlantic.

Airway Age, Vol. 12, No. 10 (Jun. 6, 1931), New York, pp. 560-564, map.

Constantin. See Automatic stability: Deux dispositifs de stabilisation automatique. Le dispositif de stabilité par gyroscopes Marmonnier. Les girouettes de stabilisation Constantin.

Constantin, L. Une possibilité d'augmentation de la charge payante de certains hydravions.

L'Aéronautique, 13me année, No. 146, Bulletin L'Aérotechnique, 9e année, No. 103 (juil. 1931) Paris, p. 253.

Construction. See Brenner, Paul: Baustoffragen bei der Konstruktion von Flumzeugen.

- See Cassens, J.: Gewichtsermittlung der wichtigsten einfachen Träger.

- See Coombes, L. P., and A. S. Crouch: The accelerations of a Fairey

"Flycatcher" seaplane during aerobatic manœuvres.

- See Ebner, Hans: Die Berechnung regelmässiger, vielfach statisch unbestimmter Raumfachwerke mit Hilfe von Differenzengleichungen.

- See Gerard, I. J.: The primary importance of mechanical testing in

aircraft construction.

- See Glauert, H.: Some generalised curves for the accelerated motion of an

aeroplane.

- See Handasyde, G. H.: Light aeroplane production. A critical description of the De Havilland works and Moth construction.

- See Hardecker, John F.: The interior decorator has his day.

- See Herrman, H.: Relative economy of different methods of airplane construction.

- See Hertel, Heinrich: Dynamische Bruchversuche mit Flugzeugbauteilen.

- See Hertel, Heinrich: Die Verdrehsteifigkeit und Verdrehfestigkeit von

Flugzeugbauteilen.

—'— See Horn, Hans A., und Karl Tewes: Die Schweissung von Elektronmetall im Flugzeugbau.

- See Lössl, E. v.: Der Einfluss des Holmgewichtes auf die Bauspannweite

und die Flugleistungen von Grossflugzeugen.

- See Minelli, Carlo: Moderni problemi sulle strutture aeronautiche.

- See Mono-Spar: An intersting experiment.

- See Rechtlich, Arved: Grundlagen für die konstructive Anwendung und

Ausführung von Stahlrohrschweissungen im Flugzeugbau.

Construction. See Seydel, Edgar: Beitrag zum Gewichtsvergleich zwischen dreigurtigem und viergurtigem Flechtwerk.

- See Seydel, Edgar: Beitrag zur Berechnung viergurtiger Flechtwerke.

- See Silva, Camillo: La tecnica construttiva degli aeroplani.

- See Teichmann, Alfred: Das räumliche Knicken einiger Stabverbindungen

des Flugzeubaus.

- See Trayer, George W., and H. W. March: Elastic instability of members

having sections common in aircraft construction.

- See Trigona della Floresta, Ercole: Problemi strutturali nella construzione

degli aeroplani giganti.

- See Younger, John Elliott, and Nairne F. Ward: Airplane construction

and repair; a textbook for airplane mechanics . . . with chapters on heat treatment and welding.

Continental. Continental A40 engine.

Aero Digest, Vol. 18, No. 2 (Feb. 1931), New York, p. 72.

Control. Control beyond the stall.

Flight, No. 1200, Vol. 23, No. 52 (Dee. 25, 1931), London, pp. 1268-1270, ills.

- Control by conventional ailerons. Results of a series of wind-tunnel experiments carried out by the U.S. Bureau of Standards.

Aircraft Engineering, Vol. 3, No. 34 (Dec. 1931), London, pp. 315-318, diagrs., tabls.

- A relief gear for the pilot. A device for reducing the load on the controls

by permanently off-setting the rudder.

Aircraft Engineering, Vol. 3, No. 34 (Dec. 1931), London, pp. 313-314, ills.

- See Alston, R. P.: Stalled flight tests on a Bristol fighter fitted with auto

control slots and interceptors.

- See Bernardi, Mario de: Single unit control.

- See Bradfield, F. B.: Centre of pressure travel of symmetrical section at

small incidence.

- See Bradfield, F. B.: Maximum lift coefficient of R.A.F. 30 all-moving

rudder.

- See Clark, K. W., and W. G. Jennings: Full scale determination of the

motion of an Avro aeroplane when stalled.

- See Cushing, R. K.: Controllability at low speeds and full scale measurements of lift and drag of Parnall "Peto" fitted with R.A.F. 31 section wings. (Slotted and unslotted.)

- See Hartshorn, A. S.: The application of the Servo principle to aileron

operation.

- See Hartshorn, A. S.: Theoretical relationship for a wing with unbalanced

ailerons.

- See Howell, A. J.: Ears your own control.

- See Irving, H. B., and A. S. Batson: Some early model experiments on

devices for improving lateral control near the stall.

Control. See Jennings, W. G.: Experiments in lateral control. An account of tests with autoslots and interceptor and spoiling devices on the same aircraft.

- See Jennings, W. G.: Tests of various controls fitted to a Siskin aircraft.

- See Jones, B. Melvill, and C. E. Maitland: Records of the lateral motions

of a stalled Bristol fighter aeroplane with slots upon the upper wing tips. Experiments made in the Cambridge University Air Squadron.

- See Jones, E. T.: Flight tests on an Atlas fitted with automatic slots

connected with the ailerons and some data relevant to the design of autoslots for R.A.F. 28 section wing.

- See Jones, E. T., and C. E. Maitland: Stalled flight tests of a Moth fitted

with auto control slots and interceptors.

- See Scott-Hall, S.: Experiments on an Ape aeroplane fitted with pilot

planes.

- See Stevens, H. L.: Testing aeroplane controls.

- See Townend, H. CH.: A study of slots, rings and boundary layer control

by blowing. . .

- See Trigona della Floresta, Ercole: Considerazioni sul comando degli

aeroplani ad ala deformabile in relazione al centramento.

- See Zahm, Albert Francis: Alexander Goupil, inventor of three-torque

airplane control.

Conventions. See Cacopardo, Salvatore: The collective aeronautical conventions and the possibility of their unification.

Cooling. See Muttray, H.: Widerstand und Kühl Wirkung eines Flugzeugrumpfes mit verschieden angeordnetem Kühler.

- See Nutt, Arthur: The cooling of engines.

- See Sales: Suggestions pour le refroidissement des moteurs par circulation

d'eau.

- See Scheubel, F. N.: Über den Lüftwiderstand luftgekühlter Stern-'

motoren.

- See Swan, Andrew: Recent developments in engine cooling.

- See Weidinger, Hanns: Liquid cooling of aircraft engines.

- See Weidinger, Hanns: Versuche mit Heisskühlung am Flugmotor.

- See Wolle, Georg: Die Kälteanlage der DVL.

Coombes, L. P., and A. S. Crouch. The accelerations of a Fairey "Flycatcher" seaplane during aerobatic manoeuvres.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 662-666, ill., diagrs. Rep. Mem. No. 1288. (Ae. 437.)

Coombes,.L. P., and R. K. Cushing. Lift and drag of Blackburn "Iris."

Aer. Res. Comm., Rep. Mem., No. 1354, (Ae. 485-T. 2810), May 1929, London, 1931, pp. 5, ills., diagrs., tabls. '

69261—35-5

Coombes, L. P. Notes on the Schneider Cup race of 1927.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, 1931, pp. 353-372, tabls. M.A.E.E. Report No. F A 68.

- See Garner, H. M., and L. P. Coombes: The determination of the water

resistance of seaplanes.

Coontz, John L. Echo conquers fog for flyers.

The Sunday Star (Magazine), Jan. 25, 1931, Washington, pp. 14, 20, ills.

Cooper, Harold J. How flying performance determines the proper physical standards for pilots.

National Aeronautic Magazine, Vol. 9, No. 1 (Jan. 1931), Washington, pp. 45-49, ills.

Cooper, John Cobb, Jr. Rules of aircraft liability in the proposed Federal merchant airship act.

Air Law Review, Vol. 2, No. 3 (July 1931), New York, pp. 327-348.

Brattleboro, Vt., 1931, pp. 327-348. Reprinted from Air Law Review, official journal of the American Academy of Air Law and the American Section of the International Committee on Radio, Vol. II, No. 3.

Cooper, Mabel C. The airlines of Mexico.

Aero Digest, Vol. 18, No. 2 (Feb. 1931), New York, pp. 86, 148, ill.

- Airports of Mexico.

U.S. Air Services, Vol. 16, No. 2 (Feb. 1931), Washington, pp. 41-42.

- An early bird goes to Paris.

U.S. Air Services, Vol. 16, No. 9 (Sept. 1931), Washington, pp. 21-24, ills.

Cooper, W. C. See Kerr, P. S.: Fuel flowmeters designed to measure mass flow.

Cope, W. F. Heat transmission between surfaces and fluids flowing over them. (1) The case of two-dimensional flow.

Aer. Res. Comm., Rep. Mem., No. 1359 (Ae. 490-T. 3017), October 1930, London, 1931, pp. 8, ill., diagr., tabls.

Coppellotti, Celestino. Designazione dei bersagli e fotografie dall'aeroplano. Riv. Aer., Anno 7, n. 12 (die. 1931) Roma, pp. 466-480, ills.

- Fotografie dalTaeroplano: la scala e rorientamento.

Riv. Aer., Anno 7, n. 7 (luglio 1931), Roma, pp. 5-15, ills.

Corrosion. Corrosion tests in Germany. Tentative standard methods laid down by the Aluminium Board of the Reichsauschuss für Metallschultz. Translated by Georg Goldbach.

Aircraft Engineering, Vol. 3, No. 30 (Aug. 1931), London, pp. 195-196, ill., diagrs.

- Protection against corrosion.

Aeroplane, Vol. 41, No. 17 (Oct. 21, 1931), London, pp. 980-982.

- See Abraham, Martin: Korrosionsversuche an Verspannungs-Draht-

litzen mit verschiedenartigen End Verbindungen.

- See Binnie, A. M.: The influence of oxygen on corrosion fatigue.

—-— See Brenner, Paul: Ergebnisse von Korrosions und Oberflachenschutz-versuchen mit Aluminium-Walzlegierungen.

- See Brenner, Paul: Korrosionsversuche mit Duralplat-Nietverbindungen.

- See Gambioli, Mario: Apparecchi per prove pratiche di corrosione dei

metalli.

Corrosion. See Guidi, G.: La corrosione dei materiali impiegati nelle con-struzioni aeronautiche.

- See Guzzoni, G., e E. Nardi: La corrosione dei metalli e leghe usati in

aeronautica.

- See Schmidt, Erich K. 0.: Einfluss von Kochsalzlösungen verschiedener

Konzentration auf den Verlauf des Korrosionsangriffs im Wechseltauchversuch.

- See Schmidt, Erich K. O.: Korrosion durch Potentialunterschiede und

ihre Verhütung.

- See Schmidt, Erich K. O.: Seewasserbeständigkeit galvanischer Uberzüge

auf Eisen und Leichtmetallen.

- See Schmidt, Erich K. 0.: Verfahren der Korrosionsprüfung.

- See Sullivan, James E.: Corrosion of duralumin rivets.

- See Sutton, H., and L. F. Le Brocq: The protection of magnesium alloys

against corrosion.

Corrugated plates. See Seydel, Edgar: Schubknickvesuche mit Wellblechtafeln.

Cosci, Domenico. Manuale del motorista d'aviazione. (Ministero dell' aeronautica) .

Roma, Istituto poligr. Stato, Libreria, 1931, pp. vi, 550, ills.

Cost, R. W. Hangar lighting and safety.

Aviation, Vol. 30, No. 6 (June 1931), New York, pp. 353-354, ills.

- Minimizing fire hazards in airplane hangars.

Airway Age, Vol. 13, No. 1 (July 4,1931), New York, p. 51.

Costanzi, Giulio. Il problema del lubrificante nazionale per i motori a scoppio e la coltivazione del ricino in Italia.

Riv. Aer., Anno 7, N. 9 (Sett. 1931), Roma, pp. 403-410.

Costs. See Lederer, Jerome: What it costs to operate a business plane.

Cotton, F. T. See Fenning, R. W., and F. T. Cotton: Experiments on the ignition of gases by sudden compression.

Courtney, Frank T. Flying versus transportation.

Aviation, Vol. 30, No. 7 (July 1931), New York, pp. 417-420.

- Speed in air transport.

Aero Digest, Vol. 19, No. 6 (Dec. 1931), New York, pp. 28,100.

- Trans-Atlantic air mail.

Aero Digest, Vol. 19, No. 2 (Aug. 1931), New York, pp. 39,119.

Cowley, W. L., and Sylvia W. Skan. A simplified analysis of the stability of aeroplanes.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 786-798. Rep. Mem. No. 1333. (Ae. 465.)

■ A study of polynomial equations.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 799-818, tabi. Rep. Mem. No. 1325. (Ae. 459.)

Cowley, W. L., and R. Warden. Tests of quarter scale models of high speed seaplanes for the Schneider Trophy Contest of 1927. Introduction and Section I. Tests on the Supermarine S. 5 models.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, 1931, pp. 17-78, ills., diagrs., tabls. Reports and Memoranda No. 1296 (Ae. 430).

- Tests of quarter scale models of high speed seaplanes for the Schneider

trophy contest of 1927. Section II. Tests on the Gloster IV models.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, 1931, pp. 81-130, ills,, diagrs., tabls. Reports and Memoranda No. 1297 (Ae. 431).

- Tests on quarter scale models of high speed seaplanes for the Schneider

Trophy Contest of 1927. Section III. Tests on the Crusader models.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, pp. 131-167, ills., diagrs., tabls. Reports and Memoranda No. 1298 (Ae. 432).

—r- Tests on quarter scale models of high speed seaplanes for the Schneider Trophy Contest of 1927. Section IV. Comparison with full scale and conclusions.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, pp. 168-199, diagrs., tabls. Reports and Memoranda No. 1299 (Ae. 433).

Cowley, W. L. See Aeronautical Research Committee; Collected reports on British high speed aircraft for the 1927 Schneider Trophy contest.

Cowling. Effect of ring type engine cowls on model of Douglas XO-14. Five-foot wind tunnel test No. 35.

Air Corps Information Circular, Vol. 7, No. 659 (April 1, 1931), Washington, United States Government Printing Office, 1931, pp. 5, ill., diagrs., tabls. Air Corps Technical Report No. 3353.

- See Engel, John H.: Rings—How to install them.

- See Rings.

- See Townend, H. C. H.: Reduction of drag of radial engines by the attachment of rings of aerofoil section, including interference experiments of an allied nature, with some further applications.

Cox, H. L. See Gough, H. J., and H. L. Cox: The behaviour of a single crystal of antimony subjected to alternating torsional stresses.

- See Gough, H. J., and H. L. Cox: Further experiments on the behaviour of

single crystals of zinc subjected to alternating torsional stresses.

- See Gough, H. J., and H. L. Cox: Mode of deformation of a single crystal

of silver.

Cox, William M. Aviation. Book one.

New York, Haaren High School, 1931.

Cram, Ralph W. I remember—Seven National Air Tours.

U.S. Air Services, Vol. 16, No. 12 (Dec. 1931), Washington, D.C., pp; 31-33. . '

- 1931 National Air Tour.

Aero Digest, Vol. 19, No. 2 (Aug. 1931), New York, pp. 42,121.

Crankshafts. Torsional vibration of crankshafts. A description of.the R. A. E. MK. Ill torsiograph.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 1118-1122, ills. Rep. Mem. No. 1248. (E. 32.)

- See Carter, B. C, and N. S. Muir: Torsional vibration of crankshafts.

Beardmore "Torando" airship engine investigations.

Crankshafts. See Lake, E. F.: Aircraft engine crankshaft.

- See Taylor, E. S.: Bearing loads on radial-engine crankshafts.

Cranwell. Regulations for admission to the Royal Air Force College, Cran-well . . . This edition cancels all previous issues. 11th ed. May 1931. London, His Majesty's Stationery Office, 1931, pp. 58, tabls. (Air publication 121.)

Crausse, E., et J. Baubiac. Sur l'application d'une méthode d'enregistrement à l'étude des tourbillons se produisant dans les liquides.

C. R. Acad. Sci., T. 192, No. 22 (1er juin 1931), Paris, pp. 1355-1357, diagrs.

- Sur les tourbillons secondaires se produisant à l'aval d'un obstacle immergé

dans un liquide.

C. R. Acad. Sci., T. 192, No. 24 (15 juin 1931), Paris, pp. 1529-1531, ill., diagrs.

Cremona, Cesare. Diagramma logaritmico per la determinazione delle A C e A a per le variazioni dell'allungamento dei profili alari monoplani.

L'Aerotecnica, Voi. 11, No. 9 (Sett. 1931), Roma, pp. 1119-1125, diagrs. Abstract in English, p. 1169.

Crocco, Gaetano Arturo. Elementi di aviazione. I. (Auspice l'Ente nazionale fascista di cultura).

Roma, A. Stock (Grafia, s.a.i. ind. grafiche), 1931, pp. 614. Collana scientifica, sezione tecnica, II.

- Iperaviazione e superaviazione. (Conferenza tenuta al Congresso delle

Scienze il 15 settembre 1931).

Riv. Aer., Anno 7, N. 10 (ott. 1931), Roma, pp. 1-33, ills., diagrs.

- Iperaviazioni e superaviazione. Seguono due note in appendice: Sui corpi

a resistenza negativa; sui corpi aerotermodinamici portanti.

L'Aerotecnica, Voi. 11, No. 10 (ott. 1931), Roma, pp. 1173-1220, ill., diagrs. Abstract in English pp. 1336-1337.

- "L'Aerotecnica". Notiziario tecnico del Ministero dell'Aeronautica e

Atti dell'Associazione Italiana di Aerotecnica.

L'Aerotecnica, Vol. 11, N. 1 (gen. 1931), Roma, p. 3.

- Problemi aeronautici. Dagli albori fino alla guerra.

Roma, A. Stock (Grafia, s.a.i. ind. grafiche), 1931, pp. 524, ill.

- Sui corpi aerotermodinamici portanti.

Rendiconti della sedute della Reale Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali (Atti, Anno 328, 1931 (IX)). Voi. 14, Fase. 5-6, Roma, 1931, pp. 161-166.

Crocker, H. E. Air transport. A flying trip to the Belgian Congo.

Flight, No. 1175, Vol. 23, No. 27 (July 3,1931), London, pp. 646-647, ill., map.

Crouch, A. S. Measurement of lift and drag of Southhampton seaplane.

Aer. Res. Comm., Rep. Mem., No. 1391 (Ae. 512-S. 73), April 1931, London, 1931, pp. 3, ill., diagrs., tabls.

- See Coombes, L. P., and A. S. Crouch: The accelerations of a Fairey

"Flycatcher" seaplane during aerobatic manoeuvres.

Crowdus, Walter C. Aviation insurance.

Journal of Air law, Vol. 2, No. 2 (April 1931), Chicago, pp. 176-192.

Croydon. Night flying at Croydon.

Flight, No. 1185, Vol. 23, No. 37 (Sept. 11, 1931), London, pp. 925-926, ills.

Crusader. "Crusader" aircraft. Single-seater high-speed float seaplane. Contract No. A.M. 674206 26. Specification No. 7 26. Engine "Bristol Mercury." Specially designed, 800 B.H.P. Constructional report. Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, 1931, pp. 320-324, ills.

- Test of sections of fuselage of Short Crusader.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, 1931, pp. 336-337.

- See Brafield, F. B., and H. Davies: Wind tunnel tests of model of "Crusader."

- See Carter W. G.: Notes and comments on the design of "The Crusader."

Part I.

- See Cowley, W. L., and R. Warden: Tests on quarter scale models of high

speed seaplanes for the Schneider Trophy Contest of 1927. Section III. Tests on the Crusader models.

Cuba. See Vest, J. R. W.: Charting Cuba's coastline from the sky.

Curry, Manfred. Sails and aerodynamics.

Flight, No. 1167, Vol. 23, No. 19 (May 8, 1931), London, p. 408.

Curtiss. The Curtiss "Kingbird." An American twin-engined cabin transport. . Flight, No. 1150, Vol. 23, No. 2 (Jan. 9,1931), London, pp. 29-30, ills.

- The new Curtiss wind tunnel.

Curtiss-Wright Review, Vol. 2, No. 3 (July 1931), New York, p. 11, ill.

Curtiss Aeroplane and Motor Co., Inc. Handbook of instructions for the assembly and maintenance with parts catalog of the O-l G & 0-39 Falcon airplane . . .

Buffalo, Curtiss Aeroplane and Motor Co., inc., Oct. 1931, pp. 140, ills., diagrs., tabls.

Curtiss-Wright Corporation. See Allen, C. B.: Curtiss moves to Buffalo.

Curvilinear flight. See Kruse, Helmuth: A study of curvilinear flight.

Cushing, R. K. Controllability at low speeds and full scale measurements of lift and drag of Parnall "Peto" fitted with R.A.F. 31 section wings (Slotted and unslotted).

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 895-905, ills., diagrs., tabls. Rep. Mem. No. 1320. (Ae. 456.)

- See Coombes, L. P., and R. K. Cushing: Lift and drag of Blackburn "Iris."

Cuthill, R. W., and H. S. Hinchman. History and commercial value of the airplane launching catapult.

Aero Digest, Vol. 19, No. 6 (Dec. 1931), New York, pp. 40-44, 98-99, ills.

Cutter, Charles N. Banking by air.

Aero Digest, Vol. 18, No. 3 (March 1931), New York, p. 94, ill.

Cutty Sark. The cruise of a "Cutty Sark."

Flight, No. 1176, Vol. 23, No. 28 (July 10,1931), London, pp. 658-660, ills., map.

Cylinder grinding. Cylinder grinding extraordinary.

Flight, No. 1161, Vol. 23, No. 13 (March 27, 1931), London, p. 268, ill.

Cylinders. See Atkin, E. H.: Torsion in thin cylinders.

- See Fage, A.: Drag of circular cylinders and spheres.

- See Fage, A., and V. M. Falkner: Further experiments on the flow

around a circular cylinder.

Cylinders. See Green, J. J.: Breakaway of boundary layer on a cylinder and an airfoil.

- See Richardson, Edward Gick: Circulation round a rotating cylinder in a

viscous fluid.

- See Richardson, Edward Gick: Flow of air adjacent to the surface of a

rotating cylinder in a stream.

- See Thorn, A.: Eddies behind a circular cylinder.

- See Thorn, A.: Experiments on the flow past a rotating cylinder.

- See Thorn, A.: The pressure on the front generator of a cylinder.

Czechoslovakia. See Rahskopff, H.: Luftsport-Verbände in der Tschechoslowakei.

D

DLV. DLV-Zuverlässigkeitsflug 1931. Der Wettbewerb der deutschen Amateurflieger.

Luftschau, 4. Jahrg., Nr. 17, 19 (10. Sept., lO.Okt. 1931), Berlin, pp. 50-51, 73-74.

- DLV-Zuverlässigkeitsflüge.

Luftschau, 4. Jahrg., Nr. 18 (24. Sept. 1931), Berlin, p. 63.

DVL. See Hoff, Wilh.: Research work of the "DVL".

- See Seewald, Friedrich: Einige Probleme aus dem Arbeitsgebiet der Aerodynamischen Abteilung der DVL.

- See Stieglitz, Albert: Der DVL-Torsiograph, ein Drehschwingungs-Messgerat für Fahrzeugmotoren.

- See Wolle, Georg: Die Kälteanlage der DVL.

D.V.L. Zeiss. II nuovo apparecchio "D.V.L. Zeiss" per misurazioni relative al decollo ed all'amarragio di veliovoli.

Riv. Aer., Anno 7, N. 12 (die. 1931), Roma, pp. 572-579, ills.

Dalby, W. E. Power and the internal combustion engine. London, Edward Arnold and Co., 1931, pp. viii, 280.

Dalissier, Alexis. Les transports aériens; étude économique; préface de Laurent Eynac.

Paris, Rousseau & Cie, 1931, pp. ix, 171.

Damon, R. S. Airplane construction production methods.

Aviation Engineering, Vol. 5, No. 4 (Nov. 1931), Washington, N.J., pp. 28-31, ills.

Daniewski, Wlodzimierz. See Morazcewska, Marja, i Wlodzimierz Daniewski: O oéwietleniu ciemni fotograficznej.

Darnell, T. H. The automotive ignition coil.

National Advisory Committee for Aeronautics, Report No. 374, April 20,1931, Washington, u.S. Government Printing Office, 1931, pp. 28, ills., diagrs., tabls.

Daugherty, R. A. Forestry towers as airway beacons.

Aero Digest, Vol. 19, No. 2 (Aug. 1931), New York, p. 76.

Davidson, Walter V. The business of flying for business.

Nat. Aer. Mag., Vol. 9, No. 9 (Sept. 1931), Washington, pp. 21-23, ills.

- Winter flying from Denver to Los Angeles.

Nat. Aer. Mag., Vol. 9, No. 10 (Oct. 1931), Washington, pp. 8-10, ills.

Davies, E. LL., and O. G. Sutton. Some problems of modern meteorology, No. 5. The present position of the theory of turbulent motion in the atmosphere. Quart. Journ. Roy. Met. Soc, Vol. 57, No. 242 (Oct. 1931), London, pp. 405-411.

Davies, Gomer Lewis. Theory of design and calibration of vibrating-reed indicators for radio range beacons.

United States Bureau of Standards, Journal of Research, Vol. 7, No. 1 (July 1931), Washington, pp. 195-213, ills., diagrs.

- See Diamond, Harry, and Gomer Lewis Davies: Characteristics of airplane

antennas for radio range-beacon reception.

Davies, H. Tests on Gloster IVB fuselage.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, pp. 210-214, ills., tabl. R.A.E Report No. B.A. 651.

--Wind tunnel test of a modified Gloster IV float.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, pp. 208-209, ill., tabl. R. A. E. Report No. B. A. 610.

- See Bradfield, F. B., and H. Davies: Wind tunnel tests of model of "Crusader."

Davies, S. J., and E. Giffen. Injection, ignition and combustion in high-speed heavy-oil engines.

Journ. Roy. Aer. Soc, Vol. 35, No. 250 (Oct. 1931), London, pp. 928-970, diagrs.

Davis, A. H. Noise.

Journ. Roy. Aer. Soc, Vol. 35, No. 248 (Aug. 1931), London, pp. 676-710, diagrs. Flight, No. 1166, Vol. 23, No. 18 (May 1, 1931), London, pp. 391-393, ill.

Davis, H. D., and C. Sprigg. Fly with me. London, Hamilton, 1931,

Davison, F. Trubee. The Air Corps.

Airway Age, Vol. 12, No. 1 (Jan. 1931), New York, pp. 56-57.

- Glancing back at 1930. The Army air corps.

Western Flying, Vol. 9, No. 1 (Jan. 1931), Los Angeles, Calif., p. 41.

- More than half a million plane miles will be flown this month during

Air Corps field exercises.

U.S. Air Services, Vol. 16, No. 5 (May 1931), Washington, pp. 25-26.

--See United States Department of War: Annual report of the Assistant

Secretary of War, Hon. F. Trubee Davison.

Davy, M. J. B. Henson and Stringfellow, their work in aeronautics; the history of a stage in the development of mechanical flight, 1840-1868. • London, H. M. Stationery Office, 1931, pp. 114, ills.

Dayhoff, Clancey. Los Angeles county airport plan. •

Aero Digest, Vol. 18, No. 6 (June 1931), New York, pp. 56-58, 140, ill., map.

Dayton Engineering Laboratories Co. Service manual, covering the Delco system installed on the Liberty aviation engine.

Dayton, O., The Dayton Engineering Laboratories Co., 1930?, pp. 32, ills.

Dean, Graham M. Daring wings.

New York, The Goldsmith Publishing Co., 1931, pp. 243.

Dearborn, C. H., and H. W. Kirschbaum. Maneuverability investigation of the F6C-3 airplane with special flight instruments.

National Advisory Committee for Aeronautics, Report No. 369, March 11, ^lj^Washington, U.S. Government Printing Office, 1930, [1931], pp. 21, ills., diagrs., tabl..

Dearborn, C. H., and H. W. Kirschbaum. Maneuverability investigation of an F6C-4 fighting airplane.

National Advisory Committee for Aeronautics, Report No. 386, Aug. 8, 1931, Washington, U.S. Government Printing Office, 1931, pp. 25, ills., diagrs., tabls.

Debus, W. Mit zehn Liter Benzin von Köln zum Bodensee? Das kommende Volksflugzeug.

Die Umschau, 35. Jahrg., Heft 33 (15. Aug. 1931), Frankfurt a. M., pp. 655-657, ills.

Decherf, E. Leforeage et le matricage des alliages légers et ultra-légers.

Aciers Spéciaux Métaux et Alliages, Vol. 6, No. 66 (fev. 1931), Paris, pp. 60-68, ills.

Deck flying. See Acland, W. R. D.: Deck flying.

- See K., A.: Deck flying.

Deeble. See French, Ned.: Deeble duplex engine.

Defoe, George L. A comparison of the aerodynamic characteristics of three normal and three reflexed airfoils in the variable density wind tunnel.

National Advisory Committee for Aeronautics, Technical Notes No. 388, Aug. 31, 1931, Washington, August 1931, pp. 12, ills., tabls. . .

Deformation of wings See Küssner, Hans Georg: Optico-photographic measurements of airplane deformations.

De Havilland. The De Havilland tiger moth.

Aeroplane, Vol. 41, No. 20 (Nov. 11, 1931), London, pp. 1131-1138, ills.

Delco. See Dayton Engineering Laboratories Co.: Service manual, covering the Delco system installed on the Liberty aviation engine.

Deming, William C. Shattering world's records in 1931.

U.S. Air Services, Vol. 16, No. 3 (March 1931), Washington, pp. 25-28, ills.

Denmark. Dansk Atlantflygning.

Flygning, Ârg. 9, N:R 8 (Aug. 1931), Stockholm, pp. 158-160, ills.

- Instruks for bevsegelige radiostationer om bord i skibe eller luftfart0jer.

April 1930.

K0benhavn, Trykt hos J. H. Schultz a/s, 1930, pp. 31, tabls. Generaldirektoratet for Post- og Telegrafvaesenet.

- Kopenhagen—Mellemfort, Luftfahrtfeuer. Kopenhagen, Schiessübungen.

Kjöge-Bucht, Schiessübungen. Fredericia, Schiessübungen. Ordrup By, Funkmasten.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 5 (31. Jan. 1931), Berlin, pp. 29-30.

Denver. See Davidson, Walter V.: Winter flying from Denver to Los Angeles.

Department of Commerce. See United States Department of Commerce.

Derstroff, Hanns. Die polarfahrt des "Graf Zeppelin." "SOS Nautilus" kein "Stop Zeppelin."

Die Umschau, 35. Jahrg., Heft 27 (4. Juli 1931), Frankfurt a. M., pp. 529-532, map.

Desgrandschamps, R. G. Calcul et construction des avions légers . . . Paris, F.-L. Vivien, 1931, ills., diagrs.

Design. 1930 airplane design.

Aviation, Vol. 30, No. 1 (Jan. 1931), New York, pp. 22-25, diagrs, tabls.

- See Barnitz, Richard B.: The effect of airplane design on airports.

- See Brownback, Henry Lowe: Simplicity in light plane engine design.

Design. See Gassner, A. A.: The economic aspects of transport plane design.

- See Joyce, Temple N.: Airplane design in relation to tactical requirements.

- See Rhode, Richard V.: The place of pressure distribution tests in structural design.

- See Russell, Frank H.: The design and production of military aircraft.

- See Young, Clarence M.: Design trends in approved type airplanes.

Desimon, Beyer. Flughafenanlagen.

Berlin, Verlag Wilhelm Ernst und Sohn, 1931, pp. 156, ills.

Detonation. See King, R. O., and H. Moss: Detonation and lubricating oil.

Detroit. The Detroit aircraft exhibition.

Aeroplane, Vol. 40, No. 18 (May 6, 1931), London, pp. 825-826, 828, ills.

- Looking at the 1931 show.

Aviation, Vol. 30, No. 5 (May 1931), New York, pp. 274-283, ills.

-- The national aircraft show at Detroit, Mich.

Airway Age, Vol. 12, No. 4 (Apr. 1931), New York, pp. 374-379, ills.

- A pre-view of the Detroit show.

Aviation, Vol. 30, No. 4 (April 1931), New York, pp. 213-217, ills.

- See Fairbanks, Rollin J.: A university wind tunnel. The Detroit single-return-flow open or closed experimental chamber tunnel described.

- See National Aircraft Show: National Aircraft Show. Detroit city airport, Detroit, Michigan, April 11-19, 1931.

- See Nevill, John T.: The national aircraft show of 1931.

- See Sherman, William F.: Aeronautics at the University of Detroit.

Detroit News. See Piersol, James V.: Adapting the airplane to the newspaper. A report covering an experiment conducted by the Detroit News.

Deutsche Luft Hansa A.G. Flug- und Beförderungsleistungen der Deutschen Luft Hansa A.G. im Jahre 1930.

Luftschau, 4. Jahrg., Nr. 10 (24. Mai 1931), Berlin, p. 77.

--Günstiger Geschäftsbericht der Deutschen Luft Hansa A.G.

Luftschau, 4. Jahrg., Nr. 13 (10. Juli 1931), Berlin, p. 3.

- Der luftf rächt verkehr; ein merkbuch für den eilversand.

Berlin, Presse: Dr. Selle-Eysler A.G., pref. 1929, pp. 16, ills.

- Meyers Luft-Reisebücher "Mitteleuropa."

Leipzig, Bibliographisches Institut A.G., 1931, pp. 556, ills.

- Mitteleuropa, unter mitwirkung der Deutschen Luft Hansa A.G., mit

einem geleitwort von Erhard Milch.

Leipzig, Bibliographisches Institut A.G., 1931, pp. xii, 544, maps.

- Verbilligte Studentenflüge bei der Deutschen Luft Hansa.

Luftschau, 4. Jahrg., Nr. 17 (10. Sept. 1931), Berlin, p. 53.

Deutsche Luftfahrt-Verband. Ratgeber für deutsche Sportflieger bei Auslandsflügen.

Berlin, Verlag und Druck Gebr. Radetzki, 1931, pp. 168, ills.

Deutsche Luftfahrt-Verband. Wir fliegen!

Berlin-Tempelhof, Verlag H. A. Braun & Co., 1930, pp. 64, ills.

- See Winkler, Horst: Das hochleistungs-segel-flugmodell, im auftrage des

Jugendausschusses des Deutschen Luftfahrt-Verbandes e.v.

Deutsche Roten Kreuz. Vom Fliegen. Zeitschrift für das Jugendrotkreuz. Berlin, Verlag Otto Eisner K.-G., 1931, pp. 16.

Deutsche Seewarte. See Lohr, A.: Cloud flights.

Deutsche Versuchsanstalt für Luftfahrt. Die Deutsche Versuchsanstalt

für Luftfahrt im Jahre 1930-31.

Zeitschr. Ver. deutscher Ing., Bd. 75, Nr. 42 (17. Okt. 1931), Berlin, pp. 1313-1314.

- See Hoff, Wilh.: Research work of the "DVL."

Deutsches Museum. Luftfahrtshistoriska samingar av intendenten T. Althin. Flygning, Arg. 9, N:R 9 (Sept. 1931), Stockholm, pp. 178-180, 185, ills.

Deutsch-Russische Luftverkehrsgesellschaft. Dern Luft ABC des luft Verkehrs.

Berlin, Denter & Nicolas, 1931, pp. 72.

Deviators. P.B. Deviators. A new type of instrument showing deviation from set course in all directions.

Flight, No. 1157, Vol. 23, No. 9 (Feb. 27, 1931), London, p. 180, ills.

Dewey, N. S. See Simmons, L. F. G., and N. S. Dewey: Wind tunnel experiments with circular discs.

Dewoitine. The Dewoitine D. 30 commercial airplane (French). A high-wing cantilever monoplane.

National Advisory Committee for Aeronautics, Aircraft Circulars No. 135, Feb. 20, 1931, Washington, February 1931, pp. 8, ills.

- The Dewoitine D 33 commercial airplane (French). A low-wing cantilever

monoplane.

National Advisory Committee for Aeronautics, Aircraft Circulars No. 146, June 16, 1931, Washington, June 1931, pp. 9, ills.

Diamond, Harry, and F. W. Dunmore. Airplanes land blind—guided by radio. Scient. Amer., Vol. 145, No. 1 (July 1931), New York, pp. 20-23, ills., diagrs.

Diamond, Harry, and Gomer Lewis Davies. Characteristics of airplane antennas for radio range-beacon reception.

United States Bureau of Standards, Journal of Research, Vol. 6, No. 5 (May 1931), Washington, pp. 901-916, ills., diagrs.

Diard, Ennemonde. Coups d'ailes de l'oiseau ä l'avion. Preface de -M. Laurent Eynac, Ministre de l'Air.

Saint-Etienne, Imprimerie industrielle, 1930, pp. xiv, 532.

Dieden. Flygarprofiler bröderna Dieden.

Flygning, Arg. 9, N:R 3 (Mars 1931), Stockholm, p. 51, ports.

Diehl, Walter Stuart. A new chart for estimating the absolute ceiling of an airplane.

National Advisory Committee for Aeronautics, Report No. 368, Jan. 26, 1931, Washington, U.S. Government Printing Office, 1930, [1931] pp. 7, diagrs., tabls.

- Some approximate equations for the standard atmosphere.

National Advisory Committee for Aeronautics, Report No. 376, March 21,1931, Washington, U.S. Government Printing Office, 1931, pp. 12, diagrs., tabls.

Diehl, Walter Stuart, and R. F. Anderson. Variable density wind tunnel test data on models of the Hawker Hornbill aeroplane and the AD-1 aerofoil section.

Aer. Res. Comm., Rep. Mem., No. 1357 (Ae. 488—T. 2987), June 1930, London, 1931, pp. 9, ills., diagrs., tabls.

Diesel engines. Fiat Diesel-type engine.

Flight, No. 1151, Vol. 23, No. 3 (Jan. 16, 1931), London, p. 48, ill.

- See Goldingham, Arthur M.: High speed Diesel engines; automotive,

aeronautical and marine, with full discussion on the various fuel injection mechanisms, together with sectional views of the numerous existing designs with their working parts.

- See Graves, W. H.: Aircraft Diesel engine fuels.

- See Hansen, F.: Der Statax-Halbdiesel-Flugmotor.

- See Junkers: Junkers-Jumo 4, der erste Dieselflugmotor der Welt.

- See Löglise, Pierre: A French Diesel engine.

- See Pye, D. R.: The limits of compression ratio in Diesel engines.

- See Rozendaal, John: Berlijnsche brief.

- See Seiliger, M.: Les moteurs Diesel sans compresseur et les moteurs semiDiesel. Traduit de l'allemand par S. Schubert.

- See Spanogle, J. A., and H. H. Foster: Fuel injection of Diesel engines.

Dihedral angle. See Bieniek, Czeslaw: Obliczanie momentu aerodynamicz-nego dla platöw o stalym ksztalcie profilu i o röznych obrysach i rozchyle-niach.

Dijk, Evert van. Over den oceaan, onze oost-west vlucht Europa-Amerika, met talrijke foto's van den tocht; inleiding van A. H. G. Fokker; voorwoord van Kingsford Smith.

Amsterdam, Scheltens & Giltay, 1930, pp. 233, ills.

Dirigibles. Das Dock für 2 Zeppeline und 4 Kleinluftschiffe.

Die Umschau, 35. Jahrg., Heft 6 (7. Feb. 1931), Frankfurt a.M., p. 117, ill.

- See Airships.

- See Great Britain: Het Britsche luchtschepen-programma.

- See H.: Havens voor luchtschepen.

Discs. See Simmons, L. F. G., and N. S. Dewey: Wind tunnel experiments with circular discs.

Distance. See Coales, J. D.: The range of aircraft. The effect of specific weight of power unit with special reference to Diesel engines.

- See Mokrzycki, Gustaw Andrezj: Sur les plus grandes distances franchissables en avion.

Distortion. See Hertel, Heinrich: Die Verdrehsteifigkeit und Verdrehfestigkeit von Flugzeugbauteilen.

Distribution. See Irwin, R. Randall: The problem of distribution.

Dixon, Charles. The conquest of the Atlantic by air.

London, S. Low, Marston & Co., ltd., Philadelphia, J. B. Lippincott Company, 1931, pp. ix, 246, ills., port., map.

- Tales of the International Caterpillar Club.

Flight, No. 1163, Vol. 23, No. 15 (April 10,1931), London, p. 322.

Doane, R. R. Aeronautical finance in 1930.

Aviation, Vol. 30, No. 1 (Jan. 1931), New York, pp. 45-49, diagrs., tabls.

Dobler, Martin L. The menace of fog.

Aero Digest, Vol. 18, No. 2 (Feb. 1931), New York, p. 39, ill. ■

Dobrowolny, Otto, und E. Stelzer. Der menschliche Aug; eine gemeinverständliche darstellung mit einer führung durch die abteilung "Luftfahrt" des Technischen museums in Wien.

Wien, Deutscher verlag für Jugend und volk, gesellschaft m.b.h., 1929, pp. 80, ills., diagrs.

Dobson, G. M. B. Ozone in the upper atmosphere and its relation to meteorology.

Nature, Vol. 127, No. 3209 (May 2, 1931), London, pp. 668-672, diagrs.

Dock. See Hangars.

Dollfus, Charles. See Hirschauer, L., et Charles Dollfus: L'année aéronautique 1930-1931.

DoMiNicus, D. Warum Gleit- und Segelflug in Deutschland? Luftschau, 4. Jahrg., Nr. 11 (10. Juni 1931), Berlin, p. 82, ill.

Donovan, William J. Origin and development of radio law.

Air Law Review, Vol. 2, No. 2-4 (April, July, Nov. 1931), New York, pp. 107-129, 349-370, 468-477.

Dope. See Colby, Thomas B.: Troubles with dope. How to prevent them.

- See McCutcheon, W. W.: Aircraft finishes.

Dorand, René. L'amélioration des hélices et leur calcul de résistance.

Paris, Le Centre de Documentation Aéronautique Internationale de L'Aéro-Club de France, 1931, pp. 25, diagrs.

Aéro-Club de France. Travaux du Cercle d'Études Aérotechniques, Fase. IV.

Dornier. Dornier-Flugboot Do.S.

Luftschau, 4. Jahrg., Nr. 1 (10 Jan. 1931), Berlin, pp. 5-6, ill.

-- Entwurf eines Dornier-Rennflugbootes.

Luftschau, 4. Jahrg., Nr. 17 (10 Sept. 1931), Berlin, p. 53, ill.

-■ See Heinze, Edwin P. A.: The New Dornier landplane.

Dornier, Claude. Vorträge und abhandlungen aus dem gebiete des flugzeug-bäues und luftschiffbaues 1914-1930. •

Berlin-Lichterfelde, Verlag für Deutsches Flugwesen g.m.b.h., 1930, pp. 145, ills., diagrs.

Dornier, Claudius, und E. Tilgenkamp. Do X—Das grösste Flugschiff der Welt.

Schaubücher Bd. 41. Herausgeber Emil Schaefler. Zürich und Leipzig, Orell Füssli Verlag, ill.

Dorset Gliding Club. Gliding; a yearbook published by Dorset Gliding Club dealing with every aspect of motorless flight . . . 1931. Weymouth, Dorset Gliding Club, 1931, ills., tabl. Editor H. R. R. Goodyear.

Do S-Has. See Bader, H. G.: Dornier-Flugboot "Do S-Has."

Douglas. See Cowling: Effect of ring type engine cowls on model of Douglas XO-14. Five-foot wind tunnel test No. 35.

Douglas, G. P., W. G. A. Perring, and R. A. Fairthorne. Wind tunnel tests with high tip speed air-screws. Experimental investigation of blade twist under load.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 394-400, ills., tabls. Rep. Mem. No. 1272 (Ae 418.)

Dowd, R. E. The Boeving devices.

Aero Digest, Vol. 19, No. 5 (Nov. 1931), New York, pp. 78-80, ills.

- Model builder's balance. Make it in your own workshop.

Aero Digest, Vol. 18, No. 1 (Jan. 1931), New York, pp. 118-120,124, ills.

Downey, H. C. How maintenance costs were lowered. Parts 1 and 2.

Airway Age, Vol. 12, Nos. 4, 5 (Apr., May, 1931), New York, pp. 340-343, 450-454, ills.

Downwash. See Petersohn, E.: Downwash measurements behind wings with detached flow.

Dowty, George H. Aircraft wheels and tyres. A review of current practice with comments on merits and demerits of various types.

Aircraft Engineering, Vol. 3, No. 27 (May 1931), London, pp. 114-116, ills., diagr.

Do.X. Un vol dans le Do.X.

L'Aéronautique, 13me année, No. 141 (fév. 1931), Paris, pp. 67-73, ills.

- See Dornier, Claudius, und E. Tilgenkamp: Do.X.—das grösste Flugschiff

der Welt.

- See G. 38: El "G. 38" y el "Do.X" en Espafia.

- See Gustosa, Corrado: Da Amsterdam a Lisbona a bordo del Do X.

- See Jones, Bradley: The Do-X, or safety first, performance second.

- See Schildhauer, C. H.: The DOX—Profitable transportation.

- See Sharp, Edward R.: An air journey de luxe.

Drag. Cutting down drag.

Aeroplane, Vol. 41, No. 20 (Nov. 11,1931), London, p. 1147, ills.

- See Bradfield, F. B., and W. G. A. Perring: Drag tests on a large model in

a small tunnel.

- See Bradfield, F. B., and R. A. Fairthorne: Drag tests on full scale float

of S. 5.

- See Bradfield, F. B.: The effect on lift and drag of corrugating the surface

of an aerofoil.

- See Bradfield, F. B., and F. W. G. Greener: Wind tunnel test of the

increased drag of a quarter scale float on adding rivets.

- See Crouch, A. S.: Measurement of lift and drag of Southampton seaplane.

- See Fage, A.: Drag of circular cylinders and spheres.

- See Fairthorne, R. A.: Drag of flags.

- See Horn, Fritz: Schiffsschlepp versuche.

- See Jones, E. T.: Drag and heat dissipation of three radiator systems.

Drag. See Lee, John G.: On the lift and drag of wings.

- See Münk, Max Michael: The induced drag.

- See Ower, E., and C. T. Hutton: The drag of small streamline bodies.

- See Thompson, Floyd La Verne, and P. H. Keister: Lift and drag characteristics of a cabin monoplane determined in flight.

Drakensberg. The Drakensberg accident.

Aeroplane, Vol. 40, No. 19 (May 13, 1931), London, pp. 864, 866, 868.

Dreieck. See Tailless: A new tail-less aeroplane. A step towards the development of a large passenger-carrying "All-wing" aircraft.

Dreisonstok, Joseph Young. Navigation tables for mariners and aviators.

United States Hydrographie Office, Publication No. 208, Washington, pp. iv, 111, tabls.

--Rapid air navigation.

Aero Digest, Vol. 19, No. 5 (Nov. 1931), New York, pp. 29-31,86, diagrs.

Drew, George Alexander. Canada's fighting airmen.

Toronto, Can., The MacLean Publishing Company, ltd., 1930, pp. 305, ills.

Drift. See Weems, Philip Van Horn: The Gatty ground speed and drift indicator.

Dryden, Hugh Latimer. Reduction of turbulence in wind tunnels.

National Advisory Committee for Aeronautics, Report No. 392, Aug. 19, 1931, Washington, U.S. Government Printing Office, 1931, pp. 11, ills., diagrs., tabl.

Dryden, Hugh Latimer, and George C. Hill. Wind pressure on a model of a mill building.

United States Bureau of Standards, Journal of Research, Vol. 6, No. 4 (April 1931), Washington, pp. 735-755, ill.

Dryden, Hugh Latimer. See Briggs, Lyman James, and H. L. Dryden: Aerodynamic characteristics of circular-arc airfoils at high speeds.

du Cluzel. Il calcolatore "du Cluzel."

Riv. Aer., Anno 7, N. 3 (marzo 1931), Roma, pp. 535-540, ills.

Ducout, Marcel S. Le rallye-parachutes de l'Aéro-club.

L'Aérophile, 39e année, No. 6 (15 juin 1931), Paris, pp. 167-169, ills.

- Les terrains.

L'Aérophile, 39e année, No. 7 (15 juil. 1931), Paris, p. 193.

Duke, Donald. Procedure and personnel of the Pan American airways system. Aero Digest, Vol. 18, No. 2 (Feb. 1931), New York, pp. 35-37, 119, ills.

Duncanson, F. Variable lift wings.

Aircraft Engineer, Flight Engineering Section, Suppl. to 1173, Vol. 23, No. 25 (June 19,1931), London, pp. 556a-556g (41-47), ills., diagrs.

Dunmore, Francis Winkley. A course indicator of pointer type for the visual radio range-beacon system.

United States Bureau of Standards, Journal of Research, Vol. 7, No. 1 (July 1931), Wash ington, pp. 147-170, ills., diagrs.

- See Diamond, H., and F. W. Dunmore: Airplanes land blind—guided

by radio.

Dupin, P., et Trissé-Solier. Hydrodynamique.—Sur les tourbillons alternés de Benard-Karman et la loi de similitude dynamique de Reynolds. CR. Acad. Sei., T. 192, No. 17 (27 avril 1931), Paris, pp. 1017-1020, ill.

Dupin, P. See Camichel, C, et P. Dupin: Hydrodynamique.—Sur les divers modes de construction des filets a l'entrée d'un ajutage. .

Dupuis, Guy D. Le rail et l'aile (étude économique sur les transports ferroviaires et aériens.)

Paris, Vivien, 1931.

Dupuy, P. Aeroplane speed characteristics. An attempt to elucidate theory in practical terms for the aeroplane pilot.

Aircraft Engineer, Vol. 3, No. 30 (Aug. 1931), London, pp. 187-190, diagrs.

—;— The "Kahn" system of map projection.

Aircraft Engineering, Vol. 3, No. 25 (March 1931), London, pp. 57-60, maps., diagrs.

Duralumin. See Weiss, Stanislaw: Pol^czenia nitowe duraluminjowe.

Duran, Heriberto. Los trasportes aéreos en los Estados Unidos de Norteamérica.

Ibérica, Ano 18, Num. 868 (7 marzo 1931), Barcelona, pp. 151-152, ills.

Düsen, W. I. van. Wings over three Americas.

Scient. Amer., Vol. 145, No. 4 (Oct. 1931), New York, pp. 234-236, ills.

Dycer. See Stimson, Thomas E., Jr.: Why the Dysers succeed.

Dynamometer. See Olszewski, Stanislaw: Dynamometr powietrzny Heenan^-Fell zainstalowany w Stacji Silnikowej I.B.T.L.

Dyvaut, Camille Claude Hyacinthe. Recueil de problèmes-types avec solutions à l'usage des candidats au brevet militaire de mécanicien d'aéronautique et aux certificats d'instruction et de perfectionnement technique des élèves pilotes et des élèves observateurs et mitrailleurs. Paris, Charles-Lavauzelle & Cie., 1930, pp. 180, diagrs.

Dziewonski, JözEF. Indykator elektro-pneumatyczny syst. "Farnboro,"

Instytut Badan Technicznych Lotnictwa, Sprawozdanie kwartalne, Nr. 3, Warszawa, 1930, pp. 39-45, ills., diagrs.

- Zastosowanie nomogramow do obliczania mocy i zuzycia paliwa silnikôw

lotniczuch.

Instytut Badan Technicznych Lotnictwa, Sprawozdanie kwartalne, Nr. 2, "Warszawa, 1930, pp. 25-34, ills., diagrs.

- See Peter, Franciszek, Stanislaw Olszewski, Jösef Dziewonski, i Hubert

Krasinski: Badania nad zastosowaniem mieszanki alkoholowej do silnika Lorraine-Dietrich 450 KM.

Dzwonkowski, Kazimierz. Sondy do pomiarôw szybkoéci samolotu.

Instytut Badan Technicznych Lotnictwa Sprawozdanie, kwartalne, Bulletin No. 7, Warszawa, 1931, pp. 87-89, ills.

Eagle. A new eagle camera.

Aeroplane, Vol. 41, No. 26 (Dec. 23, 1931), London, pp. 1433-1434, Dis.

Eaker, Ira C. The real air hero.

U.S. Air Services, Vol. 16, No. 4 (April 1931), Washington, pp. 33-34.

- What's the matter with Mr. Rogers?

U.S. Air Services, Vol. 16, No. 1 (Jan. 1931), Washington, pp, 21-24, ill.

Earhart, Amelia. Putting air travel into mass production.

Aviation, Vol. 30, No. 5 (May 1931), New York, pp. 292-294, ill.

- See Records: Nouveaux records homologués par la F.A.I.

Ears. See Howell, A. J.: Ears your own control.

Eason, Alec B. Flow and measurement of air and gases. London, Charles Griffin and Co., Ltd., 1930, pp. xil, 254.

East Hartford. Rentschler field at East Hartford.

Airway Age, Vol. 13, No. 1 (Jul. 4, 1931), New York, pp. 47-48, ills.

Eastman, Fred Scoville. Vacuum-tube control for electric wind-tunnel balances.

Seattle, University of Washington, 1931, pp. ill, 5-16, ills., diagrs.

Washington University, Engineering Experiment Station, Engineering Experiment Station Series, Bulletin No. 55.

Eberhard, : O. v. Ballistik.

Wien, W., und F. Harms: Handbuch der JB/Apomnentalphysik, Bd. 4, 3. Teil. Hydro- und aerodynamik, Leipzig, Akademische Verlagsgesellschaft m.b.H., 1930, pp. 463-537, Ills.

Ebert. Ortsbezeichung zur Luftorientierung.

Die Umschau, 35. Jahrg., Heft 14 (4. April 1931), Frankfurt a.M., p. 271, ills.

Ebert, Heinrich. Die DVL-Messnaben und ihre Verwendung beim Flugversuch.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 20. Heft (28. Okt. 1931), München und Berlin, pp. 615-616, ill., diagr.

Ebner, Hans. Die Berechnung regelmässiger, vielfach statisch unbestimmter Raumfachwerke mit Hilfe von Differenzengleichungen.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 246-288, ills., diagrs., tabls.

Eck, Bruno. Strömungslehre an hand von Strömungsbildern; darstellung der wichtigsten Strömungsvorgänge aus der flugtechnik und dem maschinenbau mit 60 Strömungsaufnahmen.

Köln, Selbsverlag, 1931, pp. 18, ills.

Eckener, Hugo. Das werk des grafen Zeppelin.

Frankfurt am Main, M. Diesterweg, 1930, pp. 36, ills. Kranz-bücherei, Hft. 114.

- See Schäffer, Ernst: Glück ab; bahnbrecher der lüfte.

Eddies. See Thorn, A.: Eddies behind a circular cylinder.

Eddy, Myron Fish. Aircraft radio.

New York, The Ronald Press Company, 1931, pp. x, 284, ills., diagrs.

Edgar, Graham. High temperature knock testing.

Aircraft Engineering, Vol. 3, No. 29 (July 1931), London, p. 171.

Edison. Edison on the flying machine.

U.S. Air Services, Vol. 16, No. 11 (Nov. 1931), Washington, D.C., p. 15.

Education. See Larner, L., and J. Ackeret: Aeronautical education and research at the Swiss Institute of Technology in Zurich.

Eggers, Wilhelm. Mein flugzeugmodell, selbstfertung leistungsfähiger modelle, nicht anschauungsmodelle, praktische bauanleitung. Leipzig, Hochmeister-Thal, 1931.

Egypt. Civil aviation in Egypt.

Aeroplane, Vol. 40, No. 24 (June 17,1931), London, p. 1156.

- Egyptian army air service.

Flight, No. 1193, Vol. 23, No. 45 (Nov. 6,1931), London, 1099, ill.

69261—35-6

Egypt. A flight into Egypt.

Aeroplane Vol. 40, no. 11 (March 18,1931), London, p. 479, ill.

Eisner, Franz. Über die Zweckmässigkeit der Telegraphie und Telephonie im Flugfunk verkehr mit Berücksichtigung neuer experimenteller Untersuchungen.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 605-614, ills., diagrs.

Eisner, Franz, G. Sudeck, Rudi Schröer und O. Zinke. Vergrösserung der effektiven Höhe von Flugzeugschleppantennen.

Luftfahrtforschung, Band 8, Heft 6, 1931, München und Berlin, R. Oldenbourg, pp. 14, ills, tabls.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 615-628, ills., diagrs., tabls.

Ekwall, G. Stockholms blivande lantiflygplats i bromma.

Flygning, Arg. 9, N: R 12 (Dec. 1931), Stockholm, pp. 236-238, ills.

Elasticity. Elasticity and fatigue.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 52-57.

- See Van den Broek, John Arbaham: Elastic energy theory.

Electricity. See Campbell, H. A.: Applications of electricity in aircraft.

Elektron metal. See Ridder, E. I. de: The use of elektron metal in airplane construction.

Elias, Franz. The transference of heat from a hot plate to an air stream.

National Advisory Committee for Aeronautics, Technical Memorandums No. 614, April 2, 1931, Washington, April 1931, pp. 25, ills., diagrs.

Ellehammer, Jacob Christian Hansen. Jeg fl0j... nogle erindringer frä en uforglemmelig tid.

K0benhavn, Drengebladet, 1931, pp. 118, ills.

Elmira. See Hirth, Wolfram K. E., Martin H. Schempp, and Jack Herrick: Elmira soaring contest, 1930.

- See Woolhope, Artur K. S.: Zweiter amerikanischer nationale Segelflugwettbewerb in Elimra.

Ely, L. B. Flying artillery.

Aero Digest, Vol. 18, No. 6 (June 1931), New York, pp. 38-39,142, ills.

Emden, R. Der Friiballon.

Wien, W., und F. Harms: Handbuch der Experimentalphysik, Bd. 4, 3. Teil. Hydro- und aerodynamik, Leipzig, Akademische Verlagsgesellschaft m. b. H, 1930, pp. 113-131, ills., table.

Empire State Building. See Pickett, Charles: The Empire State building mooring mast.

Endo, Yositosi. Atomic heat at constant pressure of crystalline substances.

Report of the Aeronautical Research Institute, Tokyo Imperial University, No.71 (Vol. 6, 5), (April 1931), Tokyo, pp. 71-82, tabls.

Endurance. See Bouch6, Henri: 10.500 kilometres en avion sans escale.

Engel, John H. Rings—How to install them.

Western Flying, Vol. 9, No. 3 (March 1931), Los Angeles, Cal., pp. 32-34, ills.

Engine oil. See Oils: Aviation engine oil.

Engine speed. See Swan, Andrew: Investigation into the increase in permissible engine speed consequent upon a reduction in the weight of the reciprocating and rotating masses.

Engineering. An introduction to aeronautical engineering. For students engaged in all branches of aeronautical work.

London, Gale & Polden, ltd., 1931, Contents: Vol. 1: Mechanics of flight, by A. C. Kermode. Vol. 2: Structures, by J. D. Haddon. Vol. 3: Materials.

- See Meyer, Louis A.: Simplified engineering and its application.

- See Roche, J. A.: Engineering, 1930-31.

Engines. An aero-engine testing plant.

Engineer, Vol. 152, No. 3944 (Aug. 14,1931), London, p. 177, ill.

- Aircraft oil engines.

Mech. Eng., Vol. 53, No. 12 (Dec. 1931), New York, pp. 908-909.

- L'ammortizzazione delle vibrazioni nei motori d'aviazione.

Riv. Aer., Anno 7, N. 4 (aprile 1931), Roma, pp. 148-154, ills., diagr.

- Approved aircraft engines. Third annual edition.

Western Flying, Vol. 9, No. 1 (Jan. 1931), Los Angeles, Cal., pp. 47-68, ills.

- Contagiri elettrici per motori d'aviazione.

Riv. Aer., Anno 7, N. 12 (die. 1931), Roma, pp. 570-572, ills.

- Diesel versus gasoline-engined plane.

Scient. Amer., Vol. 145, No. 2 (Aug. 1931), New York, pp. 401-424, ill., tabl.

- Engines.

Aeronautics, Techn. Rep. Acr. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 40-48.

- Engines at the Paris show.

Aircraft Engineer, Flight Engineering Section, Suppl. to No. 1157, Vol. 23, No. 9 (Feb. 27. 1931), London, pp. 184f-184b (14-16).

- L'équipement du groupe moteur. VII.—Compresseurs.

L'Aéronautique, 13me année, No. 142, 143 (mars-avril 1931), Paris, pp. 101-109, 141-149, ills., diagrs., tabls.

- Fiat works producing seven-cylinder air-cooled engine for small planes.

Automotive Ing., Vol. 65, No. 12 (Sept. 19,1931), New York, pp. 428-429, ills.

- Groupes-moteurs récents.

L'Aéronautique, 13me année, No. 150 (nov. 1931), Paris, pp. 393-399, ills.

- Increasing power plant efficiency.

Aviation, Vol. 30, No. 12 (Dec. 1931), New York, pp. 095-698, ills.

- A new light aeroplane engine. The 60-h.p. four-cylinder inverted air-cooled Hirth with coil-ignition described.

Aircraft Engineering, Vol. 3, No. 31 (Sept. 1931), London, p. 227, ills.

- I nuovi motori francesi del XII Salone aeronautico di Parigi.

Riv. Aer., Anno 7, N. 5 (mag. 1931), Roma, pp. 305-318, ills.

- Nya flymotorer och flyplan.

Flygning, Arg. 9, N:R 8, (Aug. 1931), Stockholm, pp. 152-153,163, ills.

- A spring hub for aero-engines. A flexible airscrew drive damping out

torque variation which also forms a transmission dynamometer.

Aircraft Engineering, Vol. 3, No. 33 (Nov. 1931), London, pp. 279-280, ills.

- See Alfa Romeo: Le perfette costruzioni motoristiche per l'aviazione dell*

Alfa Romeo.

Engines. See Andrews, W. R.: Air-cooled engine power and weight.

- See Andriani, Oronzo: Lubrificazione appropriata dei motori d'aviazione

a caratteristiche dei lubrificanti.

- See Argus: A new Argus engine.

- See Armstrong Siddeley: Arsmtrong Siddeley motors.

- See Bailey, Benj. F.: The design of capacitor motors for best starting

performance.

- See Banks, F. Rodwell: The evolution of a Schneider engine.

- See Behmann, Mario: Un nuovo motore di aviazione.

- See Boedecker, Kenneth J.: Engine servicing and service organizations.

- See Boerlage, G. D., and J. J. Broeze: The ignition quality of fuels in

compression-ignition engines.

- See Boone, Andrew R.: Engine service in the Navy.

- See Bradley, W. F.: Jalbert heavy oil engine using carburetor and premixing cylinder under construction for the French air service.

- See Brandt, Richard: Untersuchung über die Erregung von Drehschwingungen in Reihenmotoren.

- See Bréguet: Stan samolotu Bréguet XIX Nr. 60.3 po odbytym locie

Warszawa-Tokio-Warszawa.

- See Brownback: Brownback "Bumble Bee" three cylinder light aircraft

engine is air cooled.

- See Brownback, Henry Lowe: Simplicity in light plane engine design.

- See Bulman, G. P.: Engines at the Paris Aero Show.

- See Capetti, Antonio: Il motore leggero ad olio pesante.

- See Capetti, Antonio: Ricerche sperimentali sull'uso di miscele diluite e

di miscelle fortemente preriscaldate nei motori a carburazione.

- See Carter, B. C, and N. S. Muir: Torsional vibration of crankshafts.

Beardmore "Tornado" airship engine investigations.

- See Castagna, A.: Prove su radiatori per motori di aviazione.

- See Caunter, C. F.: Light aero engines.

- See Chenoweth, Opie: Engines in 1930.

- See Chilton, R.: Air-cooled cylinder-head design.

- See Christian, Manfred: A pioneer inverted engine. The Argus "As 8,"

fully described and illustrated with drawings and a power curve.

- See Christian, Manfred: Rückblick auf die Motorenschau des 12. Pariser

Salons, Dezember 1930.

- See Coales, J. D.: The range of aircraft. The effect of specific weight of

power unit with special reference to Diesel engines.

Engines. See Comité Français de Propagande Aéronautique: Notice descriptive des appareils, primés au concours pour l'amélioration de la sécurité des groupes motopropulseurs d'aéronautique, organisé par le C. F. P. Aé. avec l'appui du Ministère de l'Air.

- See Continental: Continental A40 engine.

- See Cosci, Domenico: Manuale del motorista d'aviazione.

- See Cowling: Effect of ring type engine cowls on model of Douglas

XO-14. Five-foot wind tunnel test No. 35.

- See Cylinder grinding: Cylinder grinding extraordinary.

- See Dalby, W. E.: Power and the internal combustion engine.

- See Davies, S. J., and E. Giffen: Injection, ignition and combustion in

high-speed heavy-oil engines.

- See Dziewoúski, Jósef: Indykator elektropneumatyczny syst. "Farns-

boro".

- See Dziewoúski, Józef: Zastosowanie nomogramów do obliczania mocy i

zuzycia paliwa silników lotniczuch.

- See Farleigh, Minor M.: Principles and problems of aircraft engines.

- See Fedder, A. H. R.: Air-cooled compression ignition engines (Moteurs

d'aviation à huile lourde refroidis par l'air).

- See Fedden, A. H. R.: A memorandum on the design and development of

the Bristol Mercury 1927 Schneider Trophy racing engine.

—:— See Fenning, R..W., and F. T. Cotton: Experiments on the ignition of gases by sudden compression.

- See Fraser, M. S.: The engine that flew around the world.

- See French, Ned: Deeble duplex engine.

- See Gelalles, Achille George: Coefficients of discharge of fuel injection

nozzles for compression-ignition engines.

- See Gelalles, Achille George: Effect of orifice length-diameter ratio on fuel

sprays for compression-ignition engines.

- See Goldingham, Arthur M.: High speed Diesel engines; automotive,

aeronautical and marine, with full discussion on the various fuel injection mechanisms, together with sectional views of the numerous existing designs with their working parts.

- See Guerendiain, Antonio: Recientes perfecionamientos del motor de explosión, principalmente en sus aplicaciones a la aviación.

- See Handasyde, G. H.: Building light aeroplane engines. The design and

manufacturing processes of the Cirrus-Hermes engines examined and described.

- See Handasyde, G. H.: Building radial engines. Central control and a

high finish characterize the Bristol Company's production.

- See Handasyde, G. H.: Rolls-Royce aero-engines! Reasons for the high

standard of workmanship and efficiency at derby.

Engines. See Hansen, Asmus: Therme-dynamische Rechnungsgrundlagen der Verbrennungskraftmaschinen und ihre Anwendung auf den Höhenflugmotor.

- See Hanson, Earl: Testing engines for A. T. C.

- See Helmore, W.: Engine performance with gaseous fuels. Part I—

Characteristics and engine performance of gaseous fuels obtained from oil.

- See Hirth: 50-60 PS-Hirth-Vierzylinder-Flugmotor.

- See Hirth: The Hirth light plane engine.

- See Hirth: Ein neuer Motor für Sport-flugzeuge, der Hirth "H.M. 60".

- See Hispano-Suiza: Hispano-Suiza 1,000 Hp. 18 cylinder stock aircraft

engine is designed after 1929 Schneider Cup race entry.

- See International Nickel Company: A directory of American aircraft

engines.

-- See Judge, Arthur William: Automobile and aircraft engines.

- See Judge, Arthur William: The testing of high speed internal combustion

engines.

- See Junkers: Junkers-Jumo 4, der erste Dieselflugmotor der Welt.

- See Junkers: The Junkers " Jumo 4" heavy-oil aircraft engine.

- See Junkers: II motore a olio pesante per aviazione, Junkers "Jumo 4."

- See King, R. O., and H. Moss: Detonation, spark-plug position, and

engine speed.

-- See Kühn, Fritz: Erhöhung der Sicherheit von Luftfahrzeugen durch

Bekämpfung der Brandgefahr.

- See Kuipers, C: De Armstrong-Siddeley vliegtuigmotoren.

- See Kuipers, C: Nieuwe Lorraine-Dietrich-motoren.

- See Kurtz, Oskar: Über die mechanischen Betriebsbeanspruchungen des

Vergaserflugmotors.

- See L. P.: Un moteur de Coupe Schneider 1929; de 1600 HP Hispano-Suiza.

- See Lake, E. F.: Aircraft engine crankshafts.

- See Lake, E. F.: Heat treatment of aircraft engine crankcases.

- See Léglise, Pierre: Clerget 100 hp. heavy-oil engine.

- See Léglise, Pierre: A French Diesel engine.

- See Léglise, Pierre: Les moteurs français du dernier Salon.

- See Léglise, Pierre: Superchargers.

- See Maidment, C. C: Servicing the exported engine.

-'■ See Marcotte, E.: Les moteurs à huile lourde dans 1*aéronautique.

- See Mardles, R.: Oxidation characteristics of fuel vapours with regard to

engine detonation. '

Engines. See Marvin, Charles Frederick, Jr., and Robert D. Best: Flame movement and pressure development in an engine cylinder.

- See Menasco Motors, inc.: Engine handbook for Menasco B-5 pirate.

- See Möller, W.: Der Flugmotor. Teil III, Moderne Flugmotoren.

- See Montelucci, G.: La detonazione nei motori a scoppio.

- See Muir, N. S., and A. Terry: A harmonic analysis of the torque curves

of a single cylinder electric ignition engine when throttled to various mean indicated pressures, with an appendix on the estimation of forcing torques in multi-cylinder engines.

- See Nebesar, Robert J.: Supercharging the aeroplane engine and increasing

speed with altitude.

- See Nutt, Arthur: The cooling of engines.

- See Nutt, Arthur: Installing the engine.

- See Nutt, A. E. Woodward, A. F. Scroggs, and E. Finn: Range of aircraft

with air-cooled radial engine using altitude control.

- See Oestrich, Hermann: Die Aussichten des Strahlantriebs für Flugzeuge

unter besonderer Berücksichtigung des Abgas-Strahlantriebs.

- See Oestrich, Hermann: Theoretische Untersuchung des Nachladeverfahrens als Mittel zur Aufrechterhaltung der Leistung von Viertakt-Motoren in grösseren Höhen.,

- See Oestrich, Hermann: Untersuchung eines Flugmotoren-Geblases,

Bauart Argus-Roots.

- See Olderman, Howard C: Trouble shooting on aviation engines.

- See Olszewski, Stanislaw: Dynamometr powietrzny Heenan-Fell zain-

stalowany w Stacji Silnikowej I.B.T.L.

- See Page, Victor W.: Aviation engine examiner.

- See Paris: De luchtvaart-salon te Parijs.

—— See Parkinson, Leslie R.: Technical description of the Jacobs L-3 aircraft engine.

- See Philippovich, Alexander v.: Der jetzige Stand der Prüfung von Flugmotorenkraftstoffen .

- See Philippovich, Alexander v.: Vergleichende motorische Untersuchung

von Kraftstoffen.

- See Pobjoy: The Pobjoy "R" type engine.

- See Polesine, Jotti da Badia: II motore a vapore ed il suo impiego in

aeronautica.

—See Pownall, C. A.: Better engines for Navy planes.

- See Pye, D. R.: Compression-ignition engines.

- See Pye, D. R.: The limits of compression ratio in Diesel engines. - -

- See Pye, D. R.: The origin and development of heavy-oil aero engines.._____

Engines. See Raffaelli, Italo: Apparati motori a vapore per la navigazione stratosferica.

- See Raffaelli, Italo: Apparecchio Ba/33 con [motore] Lynx suralimentato.

- See Ricardo, Harry R.: The high-speed internal-combustion engine.

- See Robinson, William: Heavy-oil engines of Akroyd type; being developments of compression-ignition oil engines, including modern applications to land purposes, marine and airship propulsion, and railway traction.

- See Rolls-Royce: The home of Rolls-Royce engines.

- See Rolls-Royce: Rolls-Royce racing engine.

- See Rolls-Royce: The Rolls-Royce racing engine. A description of the

experimental and development work involved in its evolution.

- See Rolls-Royce limited: Modern aircraft fitted with Rolls-Royce engines.

Avions modernes équipés de moteurs Rolls-Royce. Aviones modernos equipados con motores Rolls-Royce.

- See Rothrock, Addison M.: Combustion in a high-speed compression-ignition engine.

- See Rothrock, Addison M.: Hydraulics of fuel injection pumps for compression-ignition engines.

- See Rozendaal, John: Berlijnsche brief.

- See Sales: Suggestions pour le refroidissement des moteurs par circulation

d'eau.

- See Salmson: Concerning Salmson aero engines.

- See Salmson: The 50 hp. British Salmson aero engine.

- See Schnauffer, Kurt: Untersuchung von Verbrennungsvorgängen in

Zündmotoren mittels elektrischer Messverfahren.

- See Scheubel, F. N.: Über den Luftwiderstand luftgekühlter Sternmotoren.

- See Schey, Oscar William: The comparative performance of superchargers.

- See Schey, Oscar William, and Vern G. Rollin: The effect of increased

carburetor pressure on engine performance at several compressed ratios.

- See Schey, Oscar William, and Arnold E. Biermann: The effect of valve

timing upon the performance of a supercharged engine at altitude and an unsupercharged engine at sea level.

- See Schilhansl, Max: Modellversuche zur Ermittlung des Leistungsbedarfs

für die künstliche Belüftung von Motorenprüfständen.

- See Schnauffer, Kurt: Das Klopfen von Zündermotoren.

- See Seguin, L. et A.: Étude des hélices, des injecteurs et des moteurs en

fonctionnement par le méthode stroboscopique et par le photographie au millionième de seconde.

- See Seiliger, M.: Les moteurs Diesel sans compresseur et les moteurs semi-Diesel. Traduit de l'allemand par S. Schubert.

- See Siemen: Siemens flygmotorer.

Engines. See Spanogle, J. A., and H. H. Foster: Fuel injection of Diesel engines.

- See Spanogle, J. A., and C. S. Moore: Performance of a compression-ignition engine with precombustion chamber having high-velocity air flow.

- See Spanogle, J. A., and E. G. Whitney: The effectiveness of a double-stem

injection valve in controlling combustion in a compression-ignition engine.

- See Stieglitz, Albert; Der DVL-Torsiograph, ein drehschwingungs-

Messgerat fur Fahrzeugmotoren.

- See Stokes, P. H.: Performance of a compression ignition unit with reduced

intake and exhaust pressures.

- See Swan, Andrew: Piston and connecting rod weights and other relative

data in modern aircraft engines.

-- See Swan, Andrew: The progress of aero engine design at the Paris show.

- See Swan, Andrew: Recent developments in engine cooling.

- See Swan, Andrew: Recent progress in compression ignition engines.

- See Swan, Andrew: The value of reduced weight of reciprocating and rotating masses on engine performance with special reference to the permissible cost of lighter materials.

- See Sweden: Den Svenska flygmotortillverkningen.

- See Taylor, C. Fayette: Power plant progress.

- See Taylor, E. S.: Bearing loads on radial-engine crankshafts.

- See Taylor, Philip B.: The thrust of radial engines. An examination of

the present practice with suggestions for increasing effective thrust horsepower.

- See Thoelz, W., und W. Haeder: Flugmotoren in Leicht- und Schwerol-

bauart.

- See Thompson, James G.: Engine service and maintenance.

- See Thompson, James G.: Engine service and maintenance. Part IV—

The Kinner K-5.

- See Thompson, James G.: Engine service and maintenance. Part VII—

Warner Scarab and Scarab junior.

- See Thompson, James G.: Engine service and maintenance. Part VIII—

Cirrus engines.

- See Thompson, James G.: Engine service and maintenance. Part IX—

Wright and DH Gipsy.

- See Thompson, James G.: Engine service and maintenance. Part X—

Le Blond engines.

- See Thompson, James G.: Engine service and maintenance. Part XI-C—

Trouble shooting.

- See Thompson, James G.: Engine service and maintenance. Part XI-D—

Trouble shooting.

- See Tizard, H. T.: Compression-ignition engines.

Engines See Townend, H. C. H.: Reduction of drag of radial engines by the attachment of rings of aerofoil section, including interference experiments of an allied nature, with some further applications.

- See United States Department of Commerce. Aeronautics Branch:

Aircraft engine testing. July 1, 1930.

- See Weidinger, Hanns: Liquid cooling of aircraft engines.

- See Weidinger, Hanns: Versuche mit Heisskühlung am Flugmotor.

--See Wells, John E.: The manufacture of precision parts for aircraft engines.

- See Whittle, F. O. F.: The turbo-compressor and the supercharging of

aero engines.

- See Wilkinson, G. S.: Napier Lion series VIIB engine for 1927 Schneider

Trophy.

- See Zoja, R.: Sul calcolo delle molle per valvole dei motori d'aviazione.

- See Zuck, H. E.: Engine performance at high compression ratios.

England. Nàgra intryck fràn en kommendering till England. Flygning, Arg. 9, N: R 7 (Juli 1931), Stockholm, pp. 140-142.

- See Glazebrook, Richard: Aeronautical research in England. A summary of ten years' work directed by the Aeronautical Research Committee.

- See Great Britain.

--See Harper, Harry: By air from England to India.

- See Potter, Leslie S.: Flying clubs in England.

Engleman, Finis E., and Julia Salmon. Airways.

Boston, New York, D.C. Heath and Company, 1931, pp. vi, 180, ills.

English, Joseph F. Air freedom: The second battle of the books. Journal of Air Law, Vol. 2, No. 3 (July 1931), Chicago, pp. 356-371.

Enriques, G. Lo spazio atmosferico nel diritto internazionale. Estratto degli Annali dell' Università di Camerino. Roma, 1931.

Ente. See Heinze, Edwin P. A.: Focke-Wulf canard monoplane.

- See Heinze, Edwin P. A.: The Focke-Wulf "Ente."

- See Kiel, Heinrich Georg: Static longitudinal stability of "Ente"

airplanes.

- See Schulz, W. R.: A German "Canard" aeroplane. Some notes on the

characteristics of the Focke-Wulf "Ente" with construction details.

Entwistle, F. The meteorological aspects of gliding.

Journ. Roy. Aer. Soc, Vol. 35, No. 246 (June 1931), London, pp. 423-459, illus., diagrs.

Epstein,- Paul S. Air resistance of high velocity projectiles.

Physical Review, Vol. 37, No. 2 (Jan. 15,1931), Minneapolis, p. 233. (Abstract).

-- Oh the air resistance of projectiles. ' ■•

Proc. Nat. Acad. Sci., Vol. 17, No. 9 (Sept. 1931), Washington, pp. 532-547, diagrs..."

Equilibrium. See Breithaupt, A. D.: Methods of maintaining the equilibrium of airships.

Equipment. See Hertel, Heinrich: Steifigkeit, Festigkeit und Beanspruchung von Anschnallgurten und Sesseln.

Erb, Fritz. Strecke 22. (Stuttgart-Barcelona.)

Luftschau, 4. Jahrg., Nr. 10 (10. Marz 1931), Berlin, pp. 34-35.

Eredia, Filippo. Sulla meteorologia delle rotte aeree.

Riv. Aer., Anno 7, N. 9 (sett. 1931), Roma, pp. 485-496, diagrs.

- Sulla meteorologia radiotelegrafica.

Riv. Aer. Anno 7, N. 3 (marzo 1931), Roma, pp. 467-471, diagr.

Erickson, Ed. L., and Walter B. Hawkins. Reduced-rate aircraft merchandising.

Aviation, Vol. 30, No. 9 (Sept. 1931), New York, pp. 532-534.

Eschke, H. See Poster, und Eschke: Der Bau des Flugzeuges, Heft III. Der Rumpf.

Estimates. See Budgets.

Êtévé. Recherches et expériences sur le pilotage automatique.

L'Aéronautique, 13me année, No. 143 (Avril 1931), Paris, pp. 117-121, ills.

Étévé, A. Aviation.—Sur les Anémogirouettes.

C. R. Acad. Sci., T. 193, No. 12 (21 sept. 1931), Paris, pp. 457-459.

Etherton, P. T. By air to the Legion.

Aeroplane. Vol. 40, No. 23 (June 10, 1931), London, pp. 1112,1114, ills.

Etzdorf, Marga von. Der hervorragende Tokio-Flug von Marga v. Etzdorf. Luftschau, 4. Jahrg., Nr. 18 (24 Sept. 1931), Berlin, p. 64, il.

—- Kiek in die weit; als deutsche fliegerin über drei erdteilen. Geleitwort

von Prof. Dr. Hugo Junkers.

Berlin, Union deutsche Verlagsgesellschaft, 1931, pp. 172, ills., maps.

Eula, Antonio. Le nouveau tunnel a grande vitesse du ministère de l'aéronautique italienne.

L'Aéronautique, 13me année, No. 142.

L'Aérotechnique, 9e année, No. 99 (mars 1931), Paris, pp. 98-99, ills.

- Sui criteri di scelta dei profili alari.

L'Aerotecnica, Vol. 11, N. 9 (sett. 1931), Roma, pp. 1069-1090, diagrs. Abstract in English, pp. 1168-1169.

- Sul calcolo del momento torcente aerodinamico agente sulle pale delle

eliche.

L'Aerotecnica, Vol. 11, N. 11 (nov. 1931), Roma, pp. 1406-1420, diagrs., tabls. Abstract in English, p. 1490.

Europe. Europeiskt nattpostflygnat.

Flygning, Ârg. 9, N: R: 1 (Jan. 1931), Stockholm, pp. 5-7, diagr.

- Mitteleuropa, unter mitwirkung der Deutschen Luft Hansa A.G., mit

einem geleitwort von Erhard Milch.

Leipzig, Bibliographisches Institut A.G., 1931, pp. xii, 544, maps. Myers Luftreisebücher.

—— See Blankenburg: Katapultflug über 1200 km.

Evans, Floyd E. The Michigan Board of Aeronautics. '■ Aero Digest, Vol. 19, No. 4 (Oct. 1931), New York, pp. 44,117.

Evans, F. G. The method of "least work" and the stressing of aeroplane structures.

Journ. Roy. Aer. Soc., Vol. 35, No. 247 (July 1931), London, pp. 642-664.

Everitt, P. F. Tables for use in aero navigation by astronomical methods. Journ. Roy. Aer. Soc, Vol. 35, No. 242 (Feb. 1931), London, pp. 167-172.

Everling, E. Fliegerlatein oder Tatsachen.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 24. Heft (28. Dez. 1931), München und Berlin, pp. 717-719.

Everling, Emil. Flugzeuglärm.

Forschungen und Fortschritte, 7. Jahrg. No. 15 (20. Mai 1931), Berlin, pp. 217-218.

- Luftrankheit.

Forschungen und Fortschritte, 7. Jahrg., Nr. 3 (20. Jan. 1931), Berlin, pp. 43-44.

Everson, William G. Our National Guard Air Corps—nineteen squadrons strong.

Nat. Aer. Mag., Vol. 9, No. 4 (April 1931), Washington, pp. 25-28, ills.

Exhaust manifolds. See Schey, Oscar W., and Alfred W. Young: A method for reducing the temperature of exhaust manifolds.

Exhibitions. De waarde van luchtvaart-tentoonstellingen.

Het Vliegveld, 15de Jaarg., No. 2 (Feb. 1931), Amsterdam, pp. 51-52.

- See Klemin, Alexander: The National Aircraft Show.

- See Marolles, R. J. de: The twelfth Paris aero show.

- See Paris: Die Internationale Luftfahrtausstellung in Paris, November

bis Dezember 1930.

Exploration. See Balchen, Bernt: Aviation lessons of the Antarctic.

Exports. See Love, Francis H.: Precedents to guide the aeronautical exporter.

- See Rea, Courts D.: 10 months' aircraft exports, 1930.

- See Rogers, Leighton W.: Analysis of aviation exports.

Eyes. See McGrane, Lawrence H.: Eyes—How to correct them.

F

Fabrics. See Cleary, Charles J.: Fabrics in aviation. The characteristics and methods of testing of various textile materials examined and explained.

- See Laski, Jaroslaw: Pröby szycia plötna lotniczego.

Fachnormenausschuss für Luftfahrt. Luftfahrt-Normen. Berlin, Beuth-Verlag, 1931, pp. 7.

Fage, A. Drag of circular cylinders and spheres.

Aer. Res. Comm., Rep. Mem., No. 1370 (Ae. 497-T. 2961), May 1930, London, 1931, pp. 6, diagrs., tabls.

Fage, A., and J. H. Warsap. The effects of turbulence and surface roughness on the drag of a circular cylinder.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 248-255, diagrs. Rep. Mem. No. 1283 (Ae. 429.).

Fage, A., and V. M. Falkner. An experimental determination of the intensity of friction on the surface of an aerofoil.

Aer. Res. Comm., Rep. Mem., No. 1315, (Ae. 470), April 1930, London, 1931, pp. 24, ills., diagrs., tabls.

Fage, A., V. M. Falkneb, and W. S. Walkek. Experiments on a series of symmetrical Joukowski sections.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 322-340, ills., diagrs., tabls. Rep. Mem. No. 1241 (Ae. 396.)

Fage, A., and V. M. Falkner. Further experiments on the flow around a circular cylinder.

Aer. Res. Comm., Rep. Mem., No. 1369 (Ae. 496-T. 3062), February 1931, London, 1931, pp. 13, diagrs., tabls.

- Relation between heat transfer and surface friction for laminar flow.

Aer. Res. Comm., Rep. Mem., No. 1408 (Ae. 529-T. 3060), April 1931, London, 1931, pp. 30, ills., diagrs., tabls.

Fagg, Fred D. The state aeronautical regulation of 1930.

Journal of Air Law, Vol. 2, No. 2 (April 1931), Chicago, pp. 193-201.

Fairbanks, Andrew J. Aeroplane performance prediction. A description of an empirical chart from which approximate characteristics may be estimated. Aircraft Engineering, Vol. 3, No. 31 (Sept. 1931), London, p. 216, diagr.

Fairbanks, Rollin J. An American wind tunnel. A description, with a historical introduction of the 8-ft. tunnel at the University of Michigan. Aircraft Engineering, Vol. 3, No. 28 (June 1931), London, pp. 147-148.

- A university wind tunnel. The Detroit single-return-flow open or closed

experimental chamber tunnel described.

Aircraft Engineering, Vol. 3, No. 32 (Oct. 1931), London, p. 252, ills.

Fairet. The Fairey (Napier) long range monoplane.

Flight, No. 1192, Vol. 23, No. 44 (Oct. 30,1931), London, pp. 1082-1085, ills.

- See Coombes, L. P., and A. S. Crouch: The accelerations of a Fairey

"Flycatcher" seaplane during aerobatic manoeuvres.

Fairey, C. R. Growth of aviation.

Journ. Roy. Aer. Soc, Vol. 35, No. 241 (Jan. 1931), London, pp. 4-28, diagrs.

Fairey, M. C. R. Considérations sur avions de records et avions militaires. L'Aérophile, 39e année, No. 10 (15 oct. 1931), Paris, p. 289.

Fairthorne, R. A. Drag of flags.

Aer. Res. Comm., Rep. Mem., No. 1345, (Ae. 477-T. 2975), May 1930, London, 1931, pp. 5, diagrs., tabls.

- See Bradfield, F. B., and R. A. Fairthorne: Drag tests on full scale float of

S. 5.

- See Bradfield, F. B., K. W. Clark, and R. A. Fairthorne: Maximum lift

in closed and open jet tunnels.

- See Douglas, G. P., W. G. A. Perring, and R. A. Fairthorne: Wind tunnel

tests with high tip speed airscrews. Experimental investigation of blade twist load.

- See Harris, R. G., L. E. Caygill, and R. A. Fairthorne: Wind tunnel

experiments on steam condensing radiators.

- See Harris, R. G., L. E. Caygill, and R. A. Fairthorne: Wind tunnel tests

on Gloster and Supermarine wing radiators.

Falcon Four. The "Falcon Four". A new and interesting twin-engined four-seater.

Flight, No. 1156, Vol. 23, No. 8 (Feb. 20,1931), London, p. 156, ill.

Falke. Das Segelflugzeug "Falke" der R. R. G.

Luftschau, 4. Jahrg., Nr. 9 (10. Mai 1931), Berlin, p. 68.

Falkenhagen, H. Klassische Hydrodynamik.

Wien, W., und F. Harms: Handbuch der Experimentalphysik, Bd. 4, 1. Teil. Hydro- und aerodynamik, Leipzig, Akademische Verlagsgesellschaft m.b.H., 1931, pp. 43-237, ills.

Falkner, V. M., and Sylvia W. Skan. Some approximate solutions of the boundary layer equations.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 163-197, diagrs., tabls. Rep. Mem. No. 1314 (Ae. 457.)

Falkner, V. M. See Fage, A., and V. M. Falkner: An experimental determination of the intensity of friction on the surface of an aerofoil.

- See Fage, A., V. M. Falkner, and W. S. Walker: Experiments on a series

of symmetrical Joukowski sections.

- See Fage, A., and V. M. Falkner: Further experiments on the flow around a

circular cylinder.

- See Fage, A., and V. M. Falkner: Relation between heat transfer and surface friction for laminar flow.

Faraboschi, Alberto. Esperimenti su eliche per tutti gli stadii di funzionamento e per diversi valori del rapporto passo diametro.

L'Aerotecnica, Voi. 11, No. 4 (aprile 1931), Roma, pp. 395-410, diagrs., tabls. English abstract pp. 500-501.

Farleigh, Minor M. Principles and problems of aircraft engines.

New York, John Wiley and Sons, Inc., London, Chapman and Hall, ltd., 1931, pp. xi, 277. London, Chapman & Hall, ltd., 1931, pp. xi, 277, ills., diagrs.

Farman. The Farman "Stratospheric" aeroplane.

Flight, No. 1174, Vol. 23, No. 26 (June 26,1931), London, p. 572.

Farming. Farming by airplane.

Western Flying, Vol. 10, No. 3 (Sept. 1931), Los Angeles, Cal., pp. 26-27.

Farnboro. See Dziewoúski, Józef: Indykator elektropneumatyczny syst. "Farnsboro".

Fasci anelli. See Musella, Francesco: Anemometrografo Fascianelli modello 1930.

Fatigue. See Elasticity: Elasticity and fatigue.

- See Jenkin, C. F., and G. D. Lehmann: High frequency fatigue.

- See Wolski, Kazimierz: Nowoczesne próby na zmçczenie i opis maszyny

Schenck'a zainstalowanej w IBTL.

Fatuzzo, Giacomo. Su una legge periodica delle precipitazioni mensili a Tripoli. Riv. Aer., Anno 7, N. 11 (nov. 1931), Roma, pp. 306-315, diagrs.

Faujas, Alessandro. Aeroplani e cannoni; riuniti Tanno IX e. f.; 1916-1930. Sancasiano Pesa, tip. f. Ili Stianti, 1931, pp. 38, ills.

Faure, Pierre. Vers un nouveau Charleroi (la guerre aérienne de demain). Paris, A. Redier, 1931, pp. 268.

Faure-FAVier, Louise. Deauville aérien.

L'Aérophile, 39e année, No. 8 (15 août 1931), Paris, pp. 227-228, ill.

Fauvel, Ch. La navirègle.

L'Aérophile, 39« année, No. 2 (15fôv. 1931), Paris, p. 55, ill.

Fedden, A. H. R. Air-cooled compression ignition engines (Moteurs d'aviation à huile lourde refroidis par l'air).

L'Aéronautique, 13ms année, No. 141 Bulletin L'Aérotechnique, 9« année, No. 98 (fév. 1931), Paris, p. 59, diagrs.

- A memorandum on the design and development of the Bristol Mercury

1927 Schneider Trophy racing engine.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, 1931, pp. 328-332, ills.

Federation Aéronautique Internationale. Conférence de Bucarest 6-14 juin 1931.

Bull. Féd. Aér. Int., 12« année, No. 46-47 (juil-oct. 1931), Paris, pp. 54-103, ills., port.

- Conférence de Bucarest du 8 au 15 juin 1931.

Bull. Féd. Aér. Int.", 12e année, No. 44 (jan. 1931), Paris, p. 3.

- Conférence de Bucarest du 6 au 14 juin 1931.

Bull. Féd. Aér. Int., 12« année, No. 45 (avril 1931), Paris, pp. 33-35.

—'—- Conférence extraordinaire de Paris 1er décembre 1930.

Bull. Féd. Aér. Int., 12« année, No. 44 (jan. 1931), Paris, pp. 7-15, ill.

- De F. A. I.-conferentie te Bucarest 6-14 juni 1931.

Het Vliegveld, 15d« Jaarg., No. 7, 8 (Juli, Aug. 1931), Amsterdam, p. 250, 272-274.

- Informations, concernant la F. A. I.

Bull. Féd. Aér. Int., 12« année, No. 45 (avril 1931), Paris, pp. 43-44.

- International air guide; the reference book on civil and commercial aviation. Air atlas. 1st ed. 1931.

Paris, Imprimerie Crété s. a. 1931, ills., maps, plans.

Fédération Nationale Aéronautique. Le 2e Congrès de la Fédération nationale aéronautique. Paris, les 1er, 2 et 3 juin 1931.

L'Aérophile, 39« année, No. 6 (15 juin 1931), Paris, pp. 182,191.

Fendrick, R. S. Paris to New York in 6 hours in mystery plane. The Sunday Star (Magazine), Oct. 11,1931, Washington, p. 16, ill.

Fenning, R. W., and F. T. Cotton. Experiments on the ignition of gases by sudden compression.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 1145-1187, diagrs. Rep. Mem. No. 1324. (E. 36.)

Ferretti, Virgilio. La guerra batteriologica.

Riv. Aer., Anno 7, n. 2 (feb. 1931) Roma, pp. 257-271.

- La guerra chimica e la difesa della popolazione civile.

Riv. Aer., Anno. 7, N. 3 (marzo 1931), Roma, pp. 421-430.

- I ricoveri nella difesa coUectiva antigas della popolazione civile.

Riv. Aer., Anno 7, n. 12 (die. 1931), Roma, pp. 481-492.

Ferris, E. M. Creating a municipal port.

Airway Age, Vol. 12, No. 2 (Feb. 1931), New York, pp. 159-162, ills.

Feucht, Walter. See Seewald, Friedrich, und Walter Feucht: Versuchsfahrten mit einem schnellfahrenden Schienenfahrzeug mit Luftschraubenantrieb.

Fezzan. See Italy: Colle ali d'Italia alla riconquista del Fezzan.

Fiat. See Diesel engines: Fiat Diesel-type engine.

Financing. See Bouman, L. F.: De financieele zijde van het luchthavenbedrijf.

Financing. See Stimson, Thomas E., Jr.: One third down. The chief obstacle to financing airplane sales is insurance. This and other problems are discussed in this article.

Finch, Volney Cecil. Preparing for aviation; an oductory course.

New York, Simmons-Boardman Publishing Company, 1931, pp. vii, 458, ills., diagrs.

Finishing. See Lewis, H. C: Aircraft finishing of today.

- See McCutcheon, W. W.: Aircraft finishes.

Finland. Finlands insats vid Ilisutställningen.

Flygning, Arg. 9, N: R 7 (Juli 1931), Stockholm, pp. wi, id3, ills.

Finn, E., and A. E. Woodward Nutt. Accelerations on aircraft during manoeuvres.

Aer. Res. Comm., Rep. Mem., No. 1392 (Ae. 513-T. 3064), December 1930, London, 1931, pp. 5, ills., diagrs.

Finn, E. See Nutt, A. E. Woodward, A. F. Scroggs, and E. Finn: Range of aircraft with air-cooled radial engine using altitude control.

Fins. See Jones, R., and A. H. Bell: Biplane fins on a model of R. 101.

Fire. Fire fighters in the air.

Western Flying, Vol. 10, No. 6 (Dec. 1931), Los Angeles, Calif., p. 33, ill.

- Fire—What to do about it.

Western Flying, Vol. 9, No. 1 (Jan. 1931), pp. 72-74, ills.

- See Airports: That fire hazard.

- See Bouman, L. F.: Eenige persoonlijke ervaringen met brandbluschap-

paraten in het luchthavenbedrijf.

- See Cost, R. W.: Minimizing fire hazards in airplane hangars.

- See Gassaway, Gordon: Fire fighting by air—another victory over the

elements.

- See Glendinning, W. G.: Possible cause of aircraft fires on crash.

- See Kühn, Fritz: Erhöhung der Sicherheit von Luftfahrzeugen durch

Bekämpfung der Brandgefahr.

- See Kühn, Fritz: Fire prevention on aircraft.

- See Montagnes, James: Patrol operation.

Fischer, Arsenius. Zum Segelflugproblem.

Berlin, Verlag Klaslng & Co. Q. m. b. H., 1931, pp. 46, ills.

Fischetti, Ugo. II trasporto aereo di distaccamenti nelle retrovie avversaire. Riv. Aer., Anno, 7, n. 11 (nov. 1931), Roma, pp. 316-318, map.

Fish. See Montagnes, James: Transport fish by airplane.

Fisher, Gerhard R. The way home.

Western Flying, Vol. 9, No. 3 (March 1931), Los Angeles, Calif., pp. 26-28, ills.

Fisher, Joachim. Ein Wendepunkt im Luftverkehr.

Die Umschau, 35. Jahrg., Heft 19 (9. Mai 1931), Frankfurt a. M., pp. 370-378, ills., ports.

FiXEL, Rowland W. The seadrome and international law.

Journal of Air Law, Vol. 2, No. 1 (Jan. 1931), Chicago, pp. 24-28.

Fixel, Rowland W. Use of aircraft during martial law.

Air Law Review Vol. 2, No. 1 (Jan. 1931), New York, pp. 44-50.

Fizer. The Fizer "A.F.2." A new German "Pusher" two-seater.

Flight, No. 1168, Vol. 23, No. 18 (May 1,1931), London, pp. 376-377, ills.

Flachsbart, O. Luftschrauben.

Wien, W., und F. Harms: Handbuch der Experimentalphysik, Bd. 4, 3. Teil. Hydro- und Aerodynamik, Leipzig, Akadaemische Verlagsgesellschaft m. b. H., 1930, pp. 321-409, ills., diagrs.

Flags. See Fairthorne, R. A.: Drag of flags.

Flame extinction. See Helmore, W.: Experiments on flame extinction in gaseous mixtures.

Flanders, L. Howard. The flight conditions of gliders.

Flight, No. 1150, Vol. 23, No. 2 (Jan. 9,1931), L9ndon, pp. 34-35, diagrs.

Flaps. See Soul6, Hartley Akin: The effect of slots and flaps on the lift and drag of the McDonnell airplane as determined in flight.

Flat spin. See Fuchs, Richard, and Wilhelm Schmidt: The dangerous flat spin and the factors affecting it.

Flettner. See Homberger, E.: Flugzeug mit Flettnerrotor.

Flettner, Anton. See Savonius, S. J.: The S-rotor.

Floats. See Collins, A. R.: A formula for the buoyancy of the wing floats of flying boats and single float seaplanes.

- See Lockheed: The installation of floats on Colonel Lindbergh's special

Lockheed Sirius.

- See Seewald, Friederich: On floats and float tests.

- See Seewald, Friedrich: Über Schwimmer und Schwimmer versuche.

Florman, B. Den stora Italienske eskaderflygningen.

Flygning, Arg. 9, N:R 2 (Febr. 1931), Stockholm, pp. 37-39, ills.

Florman, Carl. Night air mails.

Flight, No. 1160,1161, Vol. 23, No. 12, 13 (March 20, 27, 1931), London, pp. 255-259, 273-277, diagrs., maps.

Journ. Roy. Aer. Soc, Vol. 35, No. 246 (June 1931), London, pp. 460-488, diagrs., maps.

Flow. Air flow.

Flight, No. 1199, Vol. 23, No. 51 (Dec. 18,1931), London, pp. 1243-1246, ills.

- See Fage, A., and V. M. Falkner: Further experiments on the flow around

a circular cylinder.

- See Lagally, M.: The frictionless flow in the region around two circles.

- See Szymanski, Piotr: Ecoulement plan du fluide ä travers une palissade

de segments rectilignes.

- See Thorn, A.: Experiments on the flow past a rotating cylinder.

Flowmeters. See Kerr, P. S.: Fuel flowmeters designed to measure mass flow.

Floyd Smith Aerial Equipment Co. See Irving Air Chute Co., inc., and Floyd Smith Aerial Equipment Co.: Claims of patents for parachute are adjudged valid and infringed.

Fluid flow. See Cope, W. F.: Heat transmission between surfaces and fluids flowing over them. (1) The case of two-dimensional flow.

- See Taylor, G. I.: Some cases of flow of compressible fluids.

Fluid motion. See Bénard, Henri: Nouvelles installations pour l'étude des sillages à l'Institut de Méchanique des Fluides.

- See Fage, A., and J. H. Warsap: The effects of turbulence and surface

roughness on the drag of a circular cylinder.

- See Green, J. J.: The viscous layer associated with a circular cylinder.

- See Johansen, F. C: Flow through pipe orifices at low Reynolds numbers.

- See MacCreadie, William Thomas: On the stability of the motion of a

viscous fluid.

- See National Physical Laboratory: National Physical Laboratory. Aerodynamics Department. Wind tunnel design. Fluid Motion.

- See Vasilesco, Florin: Méchanique des Fluides.—Sur une méthode de M.

Riabouchinsky ayant pour but de résondre le problème de Dirichlet en vue du calcul du potentiel des vitesses.

- See Weinstein, A.: Meccanica.—Sur le mouvement d'un fluide à travers

un barrage perméable.

Flutter. Flutter.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 35-38.

- See Vibration.

Flyabout. See Nichols, P. W.: The Alexander Flyabout.

Flying. Fallschirm, Flugzeug, Zeppelin.

Stuttgart, Francksche Verlagshandlung, 1931, pp. 80, ills.

- See Piloting.

Flying schools. See Hann, George R.: Approved versus unapproved flying schools.

Focke, H. Le principe du "canard" et ses avantages.

L'Aéronautique, 13me année, No. 144, Bulletin L'Aêrotechnique, 9e année, No. 101 (mai 1931), Paris, pp. 165-169, ills.

Focke-Wulf. Le "Canard" bimoteur Focke Wulf (Allemagne). L'Aérophile, 39e année, No. 2 (15 fév. 1931), Paris, p. 56, ills.

- Focke-Wulf A38 "Möwe."

Flight 1182, Vol. 23, No. 34 (Aug. 21,1931), London, pp. 843-945, ills.

- Il "Focke-Wulf" Ente 19.

Riv. Aer., Anno 7, n. 1 (gen. 1931), Roma, pp. 151-153, ills.

- Focke-Wulf F 19a "Ente" commercial airplane (German). A tail-first

high-wing monoplane.

National Advisory Committee for Aeronautics, Aircraft Circulars No. 132, Jan. 23, 1931, Washington, January 1931, pp. 9, ills.

- See Heinze, Edwin, P. A.: Focke-Wulf canard monoplane.

- See Heinze, Edwin P. A.: The Focke-Wulf "Ente."

Foppl, Otto. Grundzüge der technischen Schwingungslehre.

Berlin, Springer, 1931, pp. 212, ills.

Fog. Landning i dimma med radiotekniska hjälpmedel.

Flygning, Arg. 9, N:R 9 (Sept. 1931), Stockholm, pp. 173-175, ill., diagrs.

- See Adie, A. M.: The commercial importance of fog control.

- See Anderson, S. Herbert: Fog penetration.

- See Boone, Andrew R.: Recent developments in radio fog flying.

- See Breckenridge, F. C.: Transmission of light through fog. An attempt

to correlate the results of air investigations made in U.S.A. in recent years.

- See Coontz, John L.: Echo conquers fog for flyers.

- See Dobler, Martin L.: The menace of fog.

- See Meredith, F. W.: Air transport in fog.

- See Mounier, P. J. J.: Mistbestrijdung.

- See Stratton, J. A., and H. G. Houghton: A theoretical investigation of

the transmission of light through fog.

Fogg, Robert S. Money-making seaplane operation.

Aero Digest, Vol. 19, No. 1 (July 1931), New York, pp. 48,136, ills.

Fogman, Ernst. See Vitt, Leonard: Ernst Fogman 50 âr.

Fokker. The Fokker F.XII. 3 Pratt & Whitney "Wasp" engines.

Flight, No'. 1155, Vol. 23, No. 7 (Feb. 13,1931), London, pp. 132-134, ills.

- See Mono-spar: Monospar wing for Fokker F.VII-3 M.

Fokker Aircraft Corporation of America. [Manual of Fokker, Model F-14, mail plane].

New York, 1931, pp. 19, ills.

Fokker, Anthony Herman Gerard, and Bruce Gould. Flying Dutchman; the life of Anthony Fokker.

New York, H. Holt and Company, 1931, pp. 282, ills.

Fokker, Anthony Herman Gerard. See Mayo, William B., and Anthony H. G. Fokker: Metal vs. wood. Large metal airplanes, by William B. Mayo. An answer to Mr. Mayo, by Anthony H. G. Fokker.

Fombeure, G. L'altération du sens des couleurs.

L'Aérophile, 39e année, No. 5 (15 mai 1931), Paris, pp. 152-153.

Forbes, Alexander. Observations on gliding angles.

Aviation, Vol. 30, No. 6 (June 1931), New York, pp. 355-356, ill.

Ford. De drie-motorige Ford 5-AT-C.

Het Vliegveld, 15de Jaarg., No. 10 (Oct. 1931), Amsterdam, p. 369, ill.

- See National Air Transport: N.A.T.—Ford wing mail compartments.

Forestry. See Bohrer, Walt: Forest patrol in the Pacific northwest.

- See Gassaway, Gordon: Air patrol.

- See Randall, C. E.: The airplane aids the forester.

FoRLANiNi. Le nouveau dirigeable Forlanini "Omniadir."

L'Aéronautique, 13me année, No. 150 (nov. 1931), Paris, p. 384, ills.

Fort Riley, Kansas. Other arms air corps. Academic division, the Cavalry School, Fort Riley, Kansas, 1931-1932.

[Ft. Riley, Q.M.C, plant, 1931] pp. 90, diagrs.

Forza, Ernesto. Catapultamento di velivoli da nave in mare ondoso.

Riv. Aer., Anno 7, N. 6 (giugno 1931), Roma, pp. 424-436, ills.

Foster, H. H. See Spanogle, J. A., and H. H. Foster: Basic requirements of fuel-injection nozzles for quiescent combustion chambers.

- See Spanogle, J. A., and H. H. Foster: Fuel injection of Diesel engines.

Fowler, Harlan D. Variable lift.

Western Flying, Vol. 10, No. 5 (Nov. 1931), Los Angeles, Cal., pp. 31-33, ills., diagrs.

- Why not more freight by air?

Western Flying, Vol. 9, No. 4 (April 1931), Los Angeles, Cal., pp. 34-36, ill.

Fragali, Michele. Principi di diritto aeronautico.

"Cedam" Casa Editrice Dottore Antonio Milani. Padova, già Litotipo, 1930, Anno Vili.

Fragapane, G. See Gallo, G., e G. Fragapane: Leghe alluminio-cromo.

Framework. See Cassens, J.: Systematischer Gewichtsvergleich an räumlichen Fach werken.

- See Ebner, Hans: Die Berechnung regelmässiger, vielfach statisch unbestimmter Raumfachwerke mit Hilfe von Differenzengleichungen.

- See Seydel, Edgar: Beitrag zur Berechnung viergürtiger Flechtwerke.

France. L'aéronautique militaire, maritime, coloniale et marchande; ouvrage publié sous le haut patronage et avec la collaboration rédactionnelle et documentaire du Ministère de l'air.

Paris, M. & J. de Brunofl, 1931, pp. 490, ills.

- Frankreich. Verordnung über Sperrgebiete sowie Benutzung und

Beförderung von Lichtbildgerät in den französischen Kolonien.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 45-46 (14. Nov. 1931), Berlin, pp. 331-332.

- Misslungene französische Weltrekordflüge.

Luftschau, 4. Jahrg., Nr. 18 (24. Sept. 1931), Berlin, pp. 64-65, ill.

- Nouveaux appareils française de tourisme.

L'Aéronautique, 13me année, No. 148 (sept. 1931), Paris, pp. 314-320, ills.

- IVe Tableau industriel de l'aéronautique Française. La direction générale

technique due Ministère de l'Air. La chambre syndicale des industries aéronautiques. Aéronefs. Moteurs. Équipements.

L'Aéronautique, 13me année, No. 151 (déc. 1931), Paris, pp. 405-438, ills., tabls.

- Tendenze attuali dell'aviazione commerciale in Francia.

Riv. Aer., Anno 7, N. 12 (die. 1931), Roma, pp. 587-615, ills., diagrs.

- See Bouilloux-Lafont, Claude: L'aviation commerciale en France; son

histoire—son état actuel—son influence sur la vie économique.

- See Fendrick, R. S.: Paris to New York in 6 hours in mystery plane.

- See Ide, John Jay: The French Air Ministry.

- See Lamarche, Paul E.: Endurance monoplanes of France.

France. Ministère de l'Air. Aéronautique nationale. Notice sur la maneu-vre des objectifs aériens remorques. Paris, Imp. Nationale, 1931.

France. Ministère de l'Air. L'effort aérien colonial français. Plaquette éditée par le Ministère de l'Air à l'occasion de sa participation à l'Exposition Coloniale Internationale.

Paris, 1931, ills., diagrs., tabls.

- Nomenclature des ouvrages de la bibliothèque.

[Paris, Ministère de l'Air] Bureau Central des Renseignements, 1931, pp. 64.

- Les problèmes de la sécurité aérienne et les réalisations françaises. Plaquette éditée en 1931 par le Ministère de l'Air à l'occasion de sa participation officielle au dernier Salon de l'Aéronautique.

Paris, 1931, ills., diagrs., tabls.

Franchelli, G. La situation des assurances "aviation."

L'Aérophile, 39e année, No. 5 (15 mai 1931), Paris, p. 129.

Francis, Roy N. Economie airport operation.

Aero Digest, Vol. 18, No. 4 (April 1931), New York, pp. 190-191, ill.

Francis, Warren B. Aeronautics and the last session of Congress.

U.S. Air Services, Vol. 16, No. 4 (April 1931), Washington, pp. 44-45.

Francis, W. E. See Pippard, A. J. Sutton, and W. E. Francis: The stresses in a radially spoked wire wheel under loads applied to the rim.

- See Pippard, A. J. Sutton, and W. E. Francis: Stresses in wired wheels.

Franklin, Benjamin. The ingenious Dr. Franklin; selected scientific letters of Benjamin Franklin, edited by Nathan G. Goodman.

Philadelphia, University of Pennsylvania Press; London, H. Milford, Oxford University Press, 1931, pp. xi, 244, ills., diagrs. p. 89: First hydrogen balloon, p. 94: A hot air balloon, p. 96: First aerial voyage by man. p. 99: Second aerial voyage by man. pp. 103-105: A prophecy on aerial navigation.

Franquinet, E. Is binnenlandsch luchtverkeer in Nederland in de naaste toekomst mogelijk?

Het Vliegveld, 15de Jaarg., No. 10 (Oct. 1931), Amsterdam, pp. 355-358.

Franz, G. Der Voith-Schneider-Antrieb. Ein neuartiger Schiffspropeller.

Zeitschr. Ver. deutscher Ing., Bd. 75, Nr. 27 (4. Juli 1931), Berlin, pp. 873-876, ills.

Fraser, Chelsea Curtis. The model aircraft builder.

New York, Thomas Y. Crowell Company, 1931, pp. xi, 384, ills., diagrs.

Fraser, M. S. The engine that flew around the world.

National Glider and Airplane News, Vol. 3, No. 2 (Sept. 1931), New York, pp. 15-16, 66, ills.

Freeman, Hugh Barton. Comparison of full-scale propellers having R.A.F.-6 and Clark Y airfoil sections.

National Advisory Committee for Aeronautics, Report No. 378, June 17, 1931, Washington, U.S. Government Printing Office, 1931, pp. 20, ills., diagrs., tabls.

- The effect of small angles of yaw and pitch on the characteristics of airplane propellers.

National Advisory Committee for Aeronautics, Report No. 389, July 29, 1931, Washington, U.S. Government Printing Office, 1931, pp. 11, ills., diagrs., tabls.

Freeman, William Marshall. Air and aviation law (civil aviation) being an exposition of the statute and case law affecting air navigation. London, New York, Sir I. Pitman & Sons, ltd., 1931, pp. xi, 163, ills.

Freezing altitude. See Brennan, J. F.: A method of determining the altitude in the atmosphere above sea level where the freezing point of water occurs.

Freight carriers. See Bree, J. de: Het Jumbo-vrachtvliegtuig der K.L.M.

- See Fowler, Harlan D.: Why not more freight by air?

- See Germany: A German freight-carrier. A description of the new Junkers

Ju. 52 with B.M.W. VII or Leopard engine.

- See Heinze, Edwin P. A.: German transport airplanes.

- See Junkers: Un avion de fret long-courrier; le Junkers Ju. 52.

- See Junkers: A flying lorry.

- See Rathert, G. A.: An efficiency formula for cargo airplanes.

- See Woltereck, Hans: "Fliegende Güterwagen."

French, Joseph Lewis. Wings over the world, edited by Joseph Lewis French; introduction by Capt. Frank M. Hawks.

Springfield, Mass., McLoughlin Bros., 1931, pp. 303, ills.

French, Ned. Deeble duplex engine.

Aero Digest, Vol. 18, No. 1 (Jan. 1931), New York, p. 76, ills.

Freri, Prospero. L'impiego del paracadute nelle guerre future.

Riv. Aer., Anno 7, N. 12 (die. 1931), Roma, pp. 463-465.

Fricke, Herman. Fluglehre I (Bewegung).

Oldenburg i.D., Druck und Verlag von Gerhard Stalling, 1931, pp. 40, ills., diagrs.

Frictionless flow. See Legally, M.: The frictionless flow in the region around two circles.

Fritsche, Carl. The metalclad airship.

Aeroplane, Vol. 40, No. 20 (May 20, 1931), London, pp. 920, 922, 924, 926, 928, ills.

Fritsche, Carl B. The metalclad airship.

Flight, No. 1169, 1170, Vol. 23, No. 21, 22 (May 22, 29, 1931), London, pp. 461-464, 483-487, ills.

Journ. Roy. Aer. Soc, Vol. 35, No. 249 (Sept. 1931), London, pp. 818-883, ills. London, The Royal Aeronautical Society, 1931, pp. 69, ills. Aeronautical Reprints, No. 61.

Froesch, Charles. Servicing for operators.

Airway Age, Vol. 13, No. 10 (Sept. 5,1931), New York, pp. 205^-206.

Fuchs, Otto. Segelflug in der Ebene.

Luftschau, 4. Jahrg., Nr. 11 (10. Juni 1931), Berlin, p. 84.

Fuchs, Richard, and Wilhelm Schmidt. The' dangerous flat spin and the factors affecting it.

National Advisory Committee for Aeronautics, Technical Memorandums No. 629, July 16, 1931, Washington, July 1931, pp. 39, ills.

- The dangerous sideslip of a stalled airplane and its prevention.

National Advisory Committee for Aeronautics, Technical Memorandums No. 638, Sept. 17, 1931, Washington, September 1931, pp. 16, diagrs.

- Das gefährliche seitliche Kippen eines Flugzeuges über den Flügel und

seine Beeinflussung.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 13. Heft (14. Juli 1931), München und Berlin, pp. 393-400, ill., diagrs.

- The steady spin.

National Advisory Committee for Aeronautics, Technical Memorandums No. 630, July 23, 1931, Washington. July 1931, pp. 27, ills., diagrs,

Fucini, Mario. Alcuni aspetti del problema degli armamenti aerei. Riv. Aer., Anno 7, N. 1 (gen. 1931), Roma, pp. 16-37.

- II compito di contro-aviazione. Caccia o bombardamento?

Riv. Aer., Anno 7, N. 4 (aprile 1931), Roma, pp. 9-22.

Fuel. See Haifter, Mitchel: Fuel systems.

- See Mokrzycki, Gustaw Andrzej: Pewne zagadnienie lotu na wysokosd.

Fuel injection. See Gelalles, A. G., and E. T. Marsh: Effect of orifice length-diameter ratio on the coefficient of discharge of fuel-injection nozzles.

- See Gerrish, Harold C., and Fred Voss: Investigation of the discharge rate

of a fuel-injection system.

- See Rothrock, Addison M., and E. T. Marsh: The effect of injection-valve

opening pressure on spray-tip penetration.

- See Spanogle, J. A., and H. H. Foster: Basic requirements of fuel-injection

nozzles for quiescent combustion chambers.

- See Spanogle, J. A., and G. T. Hemmeter: Development of an impinging-

jet fuel-injection valve nozzle.

Fuel-line. See Bridgeman, O. C., C. A. Ross and H. S. White: Airplane fuel-line temperature.

Fuel sprays. See Galalles, Achilles George: Effect of orifice length-diameter ratio on fuel sprays for compression-ignition engines.

- See Rothrock, Addison M.: Effect of high velocities on the distribution

and penetration of a fuel spray.

--See Rothrock, Addison M.: The N.A.C.A. apparatus for studying the

formation and combustion of fuel sprays and the results from preliminary tests.

- See Rothrock, Addison M., and E. T. Marsh: Penetration and duration

of fuel sprays from a pump injection system.

- See Rothrock, Addison M., and C. D. Waldon: Some characteristics of

fuel sprays at low-injection pressures.

Fuels. Where fuel distribution becomes a major problem. Aviation, Vol. 30, No. 8 (Aug. 1931), New York, p. 483, ill.

- See Banks, F. Rodwell: Fuel quality.

- See Brown, George Granger: The volatility of motor fuels.

- See Clothier, W. C: Carburetter fuel metering characteristics.

- See Edgar, Graham: High temperature knock testing.

- See Gasoline: Aviation gasoline.

- See Graves, W. H.: Aircraft Diesel engine fuels.

- See Helmore, W.: Engine performance with gaseous fuels. Part I—Characteristics and engine performance of gaseous fuels obtained from oil.

- See King, R. O. and H. Moss: Detonation, mineral lubricating oils and

blended fuels.

Fuels. See Mardles, R.: Oxidation characteristics of fuel vapours with regard to engine detonation.

- See Peter, Franciszek, Stanislaw Olszewski, Jösef Dziewonski, i Hubert

Krasinski: Badania nad zastosowaniem mieszanki alkoholowej do silnika Lorraine-Deitrich 450 KM.

- See Tell, William K.: Taxation of aircraft motor fuel.

- See Tett, H. C: Fuels and modern methods of testing.

Fukut, Sin-ichi. See Alloys: Über die Herstellung und die mechanischen Eigenschaften der Al-Cu-Si Legierungen.

Fuller, J. F. C. See Inter-parliamentary Union: What would be the character of a new war? Enquiry organised by the Inter-parliamentary Union.

Fulton, Garland. Airship development.

Aviation, Vol. 30, No. 1 (Jan. 1931), New York, pp. 29-30, il.

Funnell, C. L. Notes on meeting the public.

Aviation, Vol. 30, No. 2 (Feb. 1931), New York, p. 110.

Fuselage. See Crusader: Test sections of fuselage of Short Crusader.

- See Ebner, Hans: Die Berechnung regelmässiger, vielfach statisch unbestimmter Raumfachwerke mit Hilfe von Differenzengleichungen.

- See Hartshorn, A. S.: Fuselage interference effect.

- See Hartshorn, A. S.: The influence of a fuselage on the lift of a monoplane.

- See Muttray, H.: Widerstand und Kühl Wirkung eines Flugzeugrumpfes

mit verschieden angeordnetem Kühler.

- See Pfister, E. und H. Eschke: Der Bau des Flugzeuges. Heft III. Der

Rumpf.

- See Rhode, Richard V., and Eugene E. Lundquist: Pressure distribution

over the fuselage of a PW-9 pursuit airplane in flight.

- See Seydel, Edgar: Beitrag zur Berechnung viergurtiger Flechtwerke.

- See Supermarine: Supermarine S. 5 fuselage proof load tests.

G

G-AAZK. Technical report by the Accidents Investigation Sub-Committee on the accident to the aeroplane G-AAZK at Meopham, Kent, on 21st July, 1930.

Aer. Res. Comm., Rep. Mem., No. 1360, January 1931, London, 1931, pp. 92, ills., diagrs.

Gabrielli, G. Problemi moderni nella costruzione metallica degli aeroplani. L'Aerotecnica, Vol. 11, N. 1 (gen. 1931), Roma, pp. 7-49, ills., diagrs., tabls. English abstract pp. 143-144.

Gaede, W. Luftpumpen.

Wien W., und F. Harms: Handbuch der Experimentalphysik, Bd. 4, 3. Teil. Hydro- und aerodynamik, Leipzig, Akademische Verlagsgesellschaft m.b.H., 1930, pp. 411-461, ills., diagr., tabl.

Galbrun, Henri. Propagation d'une onde sonore dans l'atmosphère et théorie des zones de silence.

Paris, 1931, pp. x, 352, ills. Inst, raêcan. des fluides de l'Univ. Paris,

Gallo, G., e G. Fragapane. Leghe alluminio-cromo.

L'Aerotecnica, Vol. 11, N. 12 (die. 1931), Roma, pp. 1539-1554, ills., diagrs., tabls.

Gambioli, Mario. Apparecchi per prove pratiche di corrosione dei metalli. Riv. Aer., Anno 7, N. 11 (Nov. 1931), Roma, pp. 297-305, ills.

Gamble, Charles Frederick Snowden. See Snowden Gamble, Charles Frederick.

Garcia, Gonzalo. Problemas jurídicos que la aviación plantea. Buenos-Ayres, 1931.

Garner, H. M., and L. P. Coombes. The determination of the water resistance of seaplanes.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 1321-1330, diagrs., tabi. Rep. Mem. No. 1289. (Ae. 438.)

Garratt, George A. The mechanical properties of wood; including a discussion of the factors affecting the mechanical properties, working stresses for structural timber, and methods of timber testing.

New York, John Wiley and Sons, Inc., London, Chapman and Hall, Ltd., 1931, pp. ix, 276.

Garsaux, Paul. Les examens médicaux et la navigation aérienne. l'Aérophile, 39e année, No. 3 (15 mars 1931), Paris, p. 65.

Garuffa, Egidio. Aviazione moderna; studio aerodinamico degli aeroplani ed idrovolanti, loro calcolazione et costruzione, la costruzione aviatoria in Italia.

Torino, Unione Tipografico—editrice Torinese, 1931, pp. viii, 579, ills., diagrs. Gas. See Busemann, A.: Gasdynamik.

Gases. See Eason, Alec B.: Flow and measurement of air and gases.

- See Stevens, Frederick Wiley: The gaseous explosive reaction—the effect

of pressure on the rate of propagation of the reaction zone and upon the rate of molecular transformation.

Gasoline. Aviation gasoline. (Material branch report.)

Air Corps Information Circular, Vol. 7, No. 660 (Aug. 25,1931), Washington, United States Government Printing Office, 1931, pp. 2. Air Corps Technical Report No. 3492.

Gasoline tanks. See Theodorsen, Theodore, and William C. Clay: The prevention of ice formation on gasoline tank vents.

Gasperi, Mario. Il progresso nell'autonomia degli aeroplani. L'Aerotecnica, Vol. 11, N. 10 (ott. 1931), Roma, pp. 1221-1240. Abstract in English pp. 1337-1338.

Gassaway, Gordon. Air patrol.

Western Flying, Vol. 9, No. 2 (Feb. 1931), Los Angeles, Calif., pp. 29-31, ills.

- Firefighting by air—another victory over the elements.

Airway Age, Vol. 12, No. 5 (May 2, 1931), New York, pp. 455-456, ills.

Gassner, A. A. The economic aspects of transport plane design.

Aviation, Vol. 30, No. 10 (Oct. 1931), New York, pp. 583-587, diagrs., tabls.

- Transport planes for profit.

Aviation, Vol. 30, No. 12 (Dec. 1931), New York, pp. 702-706, diagrs., tabls.

Gastaldi, Camillo. La cina ed il problema delle sue comunicazioni.

Riv. Aer., Anno 7, N. 8 (agosto 1931), Roma, pp. 223-242, maps.

Gastou, R. L'hélice aérienne; à pas constant, à pas variable. Paris, F. L. Vivien, 1930, 2 vols, ills., diagrs.

Gates, S. B. Measured spins on aeroplane H.

Aer. Res. Comm., Rep. Mem., No. 1403 (Ae. 524-Spin 61), April 1931, London, 1931, pp. 5, diagrs.

- See Batson, A. S., H. B. Irving, and S. B. Gates: Spinning experiments on a

single seater fighter. Part I.—Further model experiments, by A. S. Batson and H. B. Irving; Part II.—Full scale spinning tests, by S. B. Gates.

- See Hardy, J. K., and K. V. Wright: The automatic timing of aircraft over

a speed course.

Gatty. See Weems, Philip Van Horn: The Gatty ground speed and drift indicator.

Gatty, Harold. See Post, Wiley, and Harold Gatty: Around the world in eight days; the flight of the Winnie Mae.

Gay, Albert Pierre. Recherches sur l'hydrodynamique des liquides visqueux. Paris, E. Blondel La Rougery, 1931, pp. 126

Services Techniques et Industriels de l'Aéronautique, Publications Scientifiques et Techniques, No. 2. Préface de M. Henri Villat.

Gears. See Control: A relief gear for the pilot. A device for reducing the load on the controls by permanently off-setting the rudder.

- See Wolski, Kazimierz: Przyczynek do wytrzmaloéci przekladni zeba-

tych helikoidalnych.

Geddes, Eric. Air transport. Sir Eric Geddes on the future.

Flight, No. 1155,1156 Vol. 23, No. 7, 8 (Feb. 13, 20, 1931), London, pp. 142-144, 163-164, ills.

Geerligs, Bert Prinsen. Een praatje met Meyrouw Roosje Köler.

Het Vliegveld, 15de Jaarg., No. 7 (Juli 1931), Amsterdam, pp. 230-231, port.

Gehlen, Karl. Nachruf. Theodore Kober.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 2. Heft (28. Feb. 1931), München und Berlin, p. 37, port.

Gelalles, Achilles George. Coefficients of discharge of fuel injection nozzles for compression-ignition engines.

National Advisory Committee for Aeronautics, Report No. 373, March 31,1931, Washington, U.S. Government Printing Office, 1931, pp. 19, ills., diagrs.

- Effect of orifice length-diameter ratio on fuel sprays for compression-ignition engines.

National Advisory Committee for Aeronuatics, Report No. 402, Jan. 20, 1932, Washington, U.S. Government Printing Office, 1931, pp. 14, ills., diagrs., tabl.

Gelalles, Achilles George and E. T. Marsh. Effect of orifice length-diameter ratio on the coefficient of discharge of fuel-injection nozzles.

National Advisory Committee for Aeronautics, Technical Notes No. 369, March 31, 1931, Washington, March 1931, pp. 15, diagrs., tabl.

Generators. Windmills for aircraft generators. The manufacture and wind-tunnel testing of a centrifugally operated variable-pitch type. Aircraft Engineering, Vol. 3, No. 28 (June 1931), London, p. 144, ills.

Genzini, Carlo. L'aeroplano da caccia offensiva.

Riv. Aer., Anno 7, n. 11 (nov. 1931), Roma, pp. 293-296.

- Le armi sugli aeroplani.

Riv. Aer., Anno 7, n. 7 (luglio 1931), Roma, pp. 16-29, diagr., tabls.

George, H. S. The cause and prevention of heat cracks in aircraft welding. A study of localized stresses.

Mech. Eng., Vol. 53, No. 6 (Juno 1931), New York, pp. 433-439, ills.

Georgii, Walter. Bericht über den 11. Rhön-Segelflug-Wetbewerb.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 5. Heft (14. März 1931), München und Berlin, pp. 129-140, ills., tabls., diagrs.

- Eleventh Rhön soaring-flight contest.

National Advisory Committee for Aeronautics, Technical Memorandums No. 623, June 4, 1931, Washington, June 1931, pp. 16, diagrs., maps, tabls.

- Ten years' gliding and soaring in Germany.

Annual Report, Smithsonian Institution 1930, Washington, 1931, pp. 273-283, ills. Lecture delivered before the Royal Aeronautical Society, London, on February 19,1930.

- Veröffentlichungen des Forschungs-Instituts der Rhön-Rossitten-Gesellschaft e. V. Nr. 4: Jahrbuch 1929 und Abhandlungen der I. Wissenschaftlichen Segelflugtagung.

München und Berlin, Verlag R. Oldenbourg, 1931, pp. xvi, 132, ills.

Gerard, I. J. A method of testing the strength of aircraft hulls.

Aer. Res. Comm., Rep. Mem., No. 1398 (Ae. 519-T. 3068), November 1930, London, 1931, pp. 7, ills., diagr., tabls.

--The primary importance of mechanical testing in aircraft construction.

Journ. Roy. Aer. Soc, Vol. 35, No. 247 (July 1931), London, pp. 579-608, ills.

Gerin. L'avion Gerin à surface variable.

L'Aérophile, 39e année, No. 2 (15 fév. 1931), Paris, pp. 52-54, ills., diagrs.

Germany. De ballonsport in Duitschland.

Het Vliegveld, 15de Jaarg., No. 7 (Juli 1931), Amsterdam, pp. 251-252, ills.

- Berlin-Hannover-Westgrenze, Luftfahrtfeuer.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 13-14 (4. April 1931), Berlin, pp. 80-89, maps.

- Betriebsordnung für den internationalen Flugwetterdienst mit deutschen

Ausführungsbestimmungen.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 47-48, 49-50 (28. Nov., 12. Dez. 1931), Berlin, pp. 337-348, 349-358.

- Deutsche Luftfahrtwerbewoche 1931.

Luftschau, 4. Jahrg., Nr. 11,13 (10. Juni 10. Juli, 1931), Berlin, p. 82, 7.

- Der Deutsche Lufthaushalt 1931.

Luftschau, 4. Jahrg., Nr. 3 (10. Feb. 1931), Berlin, pp. 18-19.

- Deutschland. Darmstadt, Flughafen. Nürnberg Fürth, Flughafen.

München-Oberwiesenfeld, Flughafen. Wilhelmshaven, Wasserflughafen. Warnemünde, Schiessübungen. Spreenhagen, Schiessübungen. Meppen, Schiessübungen. Kolberg, Schiessübungen. Tenkitten (Ostpr.), Schiessübungen. Nürnberg, Schiessübungen. Ungültigkeit einer Genehmigung. Ungültigkeit von Genehmigungen. Klasseneinteilung von Flugzeugen.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 6-7 (14. Feb. 1931), Berlin, pp. 33-35.

- The "Deutschlandflug," 1931.

Flight, No. 1182, Vol. 23, No. 34 (Aug. 21,1931), London, pp. 832-833, ills.

- Der Deutschlandflug 1931.

Luftschau, 4. Jahrg., Nr. 16 (24. Aug. 1931), Berlin, pp. 37-40.

- A German freight-carrier. A description of the new Junkers Ju. 52 with

B. M. W. VII or Leopard engine.

Aircraft Engineering, Vol. 3, No. 33 (Nov. 1931), London, pp. 291-292, ills.

Germany. Gesetz zu dem Abkommen zwischen dem Deutschen Reich und Grossbritannien über Aenderung des Luftverkehrsabkommens vom 29. Juni 1927. Vom 31. März 1931.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 24 (13. Juni 1931), Berlin, pp. 165-166.

- Ein halbes Jahrhundert deutscher Luftfahrt. Zum 50 jährigen Jubiläum

des Berliner Vereins für Luftschiffahrt.

Luftschau, 4. Jahrg., Nr. 18 (24. Sept. 1931), Berlin, p. 62.

- Hilfslandeplätze auf Nachtflugstrecken.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 13-14 (4. April 1931), Berlin, pp. 79-80.

- Statistik des deutschen Fluglinienverkehrs im Kalendarjahr 1930.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 32-33, 34-35 (15., 29. Aug. 1931), Berlin, pp. 228236, 238-246.

- Verleihungsbedingungen und Verleihungsverfahren im Flugfunkdienst.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 40-41 (3-10. Okt. 1931), Berlin, pp. 286-290,294-297.

■- Zweck und Ausschreibung des Deutschlandfluges!

Luftschau, 4. Jahrg., Nr. 15 (10. Aug. 1931), Berlin, pp. 25-26

- See Aviaticus: "Aviaticus, Jahrbuch der Deutschen Luftfahrt, 1931".

- See Beck, Waldemar C.-A.: Le budget aéronautique allemand pour 1931.

- See Cesar: Englandflug des deutschen Luftfahrt Verbandes.

- See Corrosion: Corrosion tests in Germany. Tentative standard methods

laid down by the Aluminium Board of the Reichauschuss für Metallschultz. Translated by Georg Goldbach.

- See Deutsche Luft Hansa a.g.: Das luftf rächt verkehr; ein inerkbuch für

den eilversand.

- See Georgii, Walter: Ten years' gliding and soaring in Germany.

- See Gottscho, Ernst: Luftverkehrsrecht; luftverkehrsgesetz und luftverkehrsVerordnung nebst ergänzendem anhang; mit einleitung, erläuterungen, tabellen und Sachverzeichnis.

- See Great Britain: Agreement between His Majesty in respect of the

United Kingdom and the President of the German Reich amending the agreement of June 29, 1927 relating to air navigation. Berlin, July 5, 1930. Ratifications exchanged at Berlin, May 6, 1931.

- See Hahn, Kurt: Die deutschen luftverkehrsabkommen.

- See Heinze, Edwin P. A.: The "Deutschlandflug, 1931".

- See Heinze, Edwin P. A.: German transport airplanes.

- See Hoeck, James: Braunschweig cradle of German aviation.

- See Hübner, Walter: Der Deutschlandflug 1931.

- See Osswald, Emmy: Zur rationalisierung der innerdeutschen handelsluftfahrt.

- See Pleines, Wilhelm: Die Flugzeugmuster des "Deutschlandflug 1931."

Gernsbach, Hugo, and Emanuel Stieri. Aviation mechanics. Vol. 1-2; April ? 1930-July, August 1931.

New York, Popular Book Corporation, 1930-31, Aviation Mechanics Publications, inc., 1931, ills., diagrs. Editors: April 1930-February 1931, Hugo Gernsback. March-August 1931, Emanuel Stieri. No more published.

Gerrish, Harold C., and Fred Voss. Investigation of the discharge rate of a fuel-injection system.

National Advisory Committee for Aeronautics, Technical Notes No. 373, April 25, 1931, Washington, April 1931, pp. 11, ills., diagrs., tabi.

Gerville-Réache, Leo. Autour du monde en Zeppelin. Paris, La Nouvelle Revue Critique, 1929, pp. 223, His. Collection La vie d'aujourd'hui, 7.

Gescheit, H. H., und K. Wittmann. Neuzeitlicher verkehrsbau.

Potsdam, Müller & Kiepenheuer Ges. Verlag, 1931, pp. 334, ills.

Giacomelli, R. An all-metal Savoia. The new S. 55M described and illustrated.

Aircraft Engineering, Vol. 3, No. 29 (July 1931), London, p. 174, ills., diagrs.

Gì Alanella, Lucio. Sulle correnti generate da una coppia di vortici o di sorgenti.

L'Aerotecnica, Vol. 11, N. 1 (gen. 1931), Roma, pp. 78-92, diagrs. English abstract, pp. 146-147.

Giannini, Amedeo. Gli aeromobili militari.

Riv. Aer., Ano 7, N. 6 (giugno 1931), Roma, pp. 442-450.

- La nazionalità degli aeromobili.

Riv. Aer., Anno 7, N. 8 (Agosto 1931), Roma, pp. 243-258.

- Saggi di diritto aeronautico.

Milano, Soc. ed. "Vita e Pensiero", 1931, pp. 378.

Giant airplanes. See Jones, Ernest: What of the giant airplane?

Gippen, E. See Davies, S. J., and E. Giffen: Injection, ignition and combustion in high-speed heavy-oil engines.

Gilliam, Ralph E. Glue—How to use it.

Western Flying, Vol. 9, No. 5 (May 1931), Los Angeles, Cai., pp. 42-43,90.

Gingrich, John Edward. Aerial and marine navigation tables.

New York and London, McGraw-Hill Book Company, inc., 1931, pp. vii, 63, tabls., diagrs.

Girault, Maurice. Methode géométrique de traces de profus d'ailes et de corps fuselés. Essai sur la viscosité en mécanique des fluides. Paris, E. Blondel La Rougery [etc.], 1931, pp. 28, 34, ills., diagrs.

Girders. See Cassens, J.: Gewichtsermittelung der wichtigsten einfachen träger.

- See Misztal, Franciszek: Doswiadczalne sprawdzenie teorji belek prostych

o przekrojach wiotkich.

- See Wagner, Herbert: Flat sheet metal girder with very thin metal web.

Glass, T. G. Wind channel walls interference.

Transactions of the Central Aero-Hydrodynamical Institute, No. 55,1930, Moscow.

Glauert, H. Airscrews for high speed aeroplanes.

Aer. Res. Comm., Rep. Mem., No. 1342, (Ae. 474-T. 2985), June 1930, London, 1931, pp. 18, diagrs., tabls.

- The force and moment on an oscillating aerofoil.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 742-758, diagrs., tabls. Rep. Mem. No. 1242. (Ae. 397.)

- The importance of the boundary layer.

Journ. Roy. Aer. Soc, Vol. 35, No. 244 (April 1931), London, pp. 333-337.

Glauert, H. Some generalised curves for the accelerated motion of an aeroplane.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 666-676, diagrs., tabls. Rep. Mem. No. 1291. (Ae. 440.)

- The stability of a body towed by a light wire.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 1331-1352, diagrs., tabls. Rep. Mem. No. 1312. (Ae. 451.)

- The use of small wind tunnels in aeroplane design.

Journ. Roy. Aer. Soc, Vol. 35, No. 243 (March 1931), London, pp. 207-230, diagrs.

Glazebrook, Richard. Aeronautical research in England. A summary of ten years' work directed by the Aeronautical Research Committee. Aircraft Engineering, Vol. 3, No. 25 (March 1931), London, pp. 63-66, tabls.

Glazebrook, R. T. Aeronautical Research Committee. Report for the year 1929-1930.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 1-14, illus. Glendinning, W. G. Possible cause of aircraft fires on crash.

Aer. Res. Comm., Rep. Mem., No. 1375 (E. 47-G.36, 39 & a.), January 1930, London, 1931, pp. 19, ills., diagrs., tabls.

Gliders. The "Tern" glider.

Flight, No. 1185, Vol. 23, No. 37 (Sept. 11,1931), London, p. 923, ills.

- See Andrews W. R.: Gliders and gliding.

- See Brant: The Brant "Scud" intermediate gliders.

- See Fischer, Arsenius: Zum segelflugproblem.

- See Flanders, L. Howard: The flight conditions of glider.

- See Harmel, Falk: Breaking the endurance record for gliders.

- See Italiaander, Rolf: So lernte ich Segelfliegen.

- See Lemoing, C: Le premier vol sans moteur vers 1806 ä Angoul6me.

- See Lippisch, A.: The development, design and construction of gliders and

sailplanes.

- See Rhön-Rossitten-Gesellschaft: Richtlinien für bau von gleit- und

Segelflugzeugen, bearbeitet von der Technischen Kommission der Rhönsegelflugwettbewerbe . . .

- See Stamer, Fritz: Gleit- und segelflugschulung.

- See United States Department of Commerce. Aeronautics Branch.

Gliders and gliding. July 1,1930.

- See Walker, Donald F.: A glider year.

- See Winkler, Horst: Das hochleistungs-segelflugmodell, im auftrage des

Jugendausschusses des Deutschen Luftfahrt-Verbandes E.V.

Gliding. Gliding activities.

Aviation, Vol. 30, No. 1 (Jan. 1931), New York, pp. 37-38, ills.

- See Avia: Le vol sans moteur.

- See Dorset Gliding Club: Gliding; a yearbook published by Dorset Gliding Club dealing with every aspect of motorless flight . . . 1931.

Gliding. See Entwistle, F.: The meteorological aspects of gliding.

- See Fischer, Arsenius: Zum Segelflugproblem.

- See Gerogii, Walter: Ten years' gliding and soaring in Germany.

- See Kleffel, Walther: Der Segelflug; ein ruhmeskapitel aus der geschichte

des menschenfluges. Für die Rhön-Rossitten-Gesellschaft geschrieben.

- See Langsdorf!, Werner von: Das Segelflugzeug.

- See Minelli, C.: Le ali dei velivoli e le loro strutture.

- See Ross, Malcolm Harrison: Sailing the skies; gliding and soaring.

- See Soaring.

- See Stamer, Fritz, und A. Lippisch: Gleitflug und Gleitflugzeuge. Teil II.

Bauanweisungen und Bauzeichnungen.

- See Switzerland. Schweiz. Motorloser Flug. Reglement betreffend die

Organisation der Aufsicht über das motorlose Flugwesen vom 14. Dezember 1930.

- See White, Percival, and Mat White; Gliding and soaring; an introduction

to motorless flight.

Gloeckner, Heinrich. Beiträge zur Flugfunkeigenteilung.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V. München und Berlin, 1931, pp. 672-678, ills., map, diagr.

Gloster. The Gloster S.S. 19. A multi-gun single-seater fighter.

Flight, No. 1157, Vol. 23, No. 9 (Feb. 27, 1931), London, p. 176, ill.

- Static stability tests of Gloster IV floats.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, 1931, pp. 338-339, diagr. M.A.E.E. Report No. F A 48.

- Static thrust tests of two airscrews on Gloster HIB No. N. 195.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, 1931, pp. 270-273, ills., diagrs., table. M.A.E.E. Report No. FA 56.

- Tests of experimental airscrews on Gloster IIIA.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, 1931, pp. 274-279, tabls. M.A.E.E. Report No. F A 27.

- See Cowley, W. L., and R. Warden: Tests of quarter scale models of high

speed seaplanes for the Schneider Trophy Contest of 1927. Section II. Tests on the Gloster IV models.

- See Davies, H.: Tests on Gloster IVB fuselage.

- See Davies, H.: Wind tunnel test of a modified Gloster IV float.

- See Harris, R. G., L. E. Caygill, and R. A. Fairthorne: Wind tunnel tests

on Gloster and Supermarine wing radiators.

- See Hartshorn, A. S.: Test of a model of a Gloster high speed seaplane.

- See Hartshorn, A. S.: Wind tunnel test of a Gloster IV float.

- See Preston, H. E.: Notes on design and construction of Gloster IV. 1927

Schneider Trophy racing seaplanes.

Glover, W. Irving. Contract air mail's future.

Aviation, Vol. 30, No. 4 (April 1931), New York, pp. 218-219.

Glover, W. Irving. Tomorrow's speed will make stage coaches of today's planes.

U.S. Air Services, Vol. 16, No. 3 (March 1931), Washington, pp. 22, 24.

Glue. See Gilliam, Ralph E.: Glue—How to use it.

Goerz-Clementi. Indicatore di rotta Georz-Clementi.

Riv. Aer., Anno 7, N. 3 (marzo 1931), Roma, pp. 534-535, ill.

Gold, E. See McAdie, Alexander, and E. Gold: Meteorological conditions during the air raid on London, Oct. 19-20, 1917.

Goldbach, Georg. Vereisungsgefahr bei Flugzeugen.

Die Umschau, 35. Jahrg., Heft 6 (7. Feb. 1931), Frankfurt, a.M., p. 106.

Goldingham, Arthur M. High speed Diesel engines; automotive, aeronautical and marine, with full discussion on the various fuel injection mechanisms, together with sectional views of the numerous existing designs with their working parts.

London, E. and F. N. Sponltd., 1931, pp. 160.

Goldsborough, Frank. See Mockler, Don: Frank Goldsborough.

Goldsborough, Paul. Are European airlines better than those of the United States?

Aero Digest, Vol. 19, No. 5 (Nov. 1931), New York, pp. 36-37, 88, ills.

Goldsmith, Margaret Leland. Zeppelin, a biography. New York, W. Morrow & Company, 1931, pp. 278, ills.

Goldstein. See Helmbold, H. B.: Goldstein's solution of the problem of the aircraft propeller with a finite number of blades.

Goodrich. See Ice: Tegen ijsaanzetting.

Goodyear, H. R. R. See Dorset Gliding Club: Gliding; a yearbook published by Dorset Gliding Club dealing with every aspect of motorless flight ... 1931.

Goodyear-Zeppelin. See Akron: The latest rigid airship. The Goodyear-Zeppelin Akron built for the U.S. Navy fully described and illustrated.

Goodyear-Zeppelin Corporation. See Watson, Wilbur Jay: Building the world's largest airship factory and dock; a complete description of this giant structure of the Goodyear-Zeppelin Corporation at Akron, Ohio.

Gordon-Bennett. See Raven, E.: Vom Freiballon, Fortschritt, Handikap und dem Fehlen den Gordon-Bennett-Ballon.

Gore, Warren J. Use of air travel tickets.

Aero Digest, Vol. 19, No. 3 (Sept. 1931), New York, p. 73, ill.

Gotland. See Hult, I.: Flygplankryssaren "Gotland."

Goto, Masaharu. See Alloys: Über die Herstellung und die mechanischen Eigenschaften der Al-Cu-Si Legierungen.

Gottscho, Ernst. Luftverkehrsrecht; luftverkehrsgesetz und luftverkehrsverordnung nebst ergänzendem anhang; mit einleitung, erläuterungen, tabellen und Sachverzeichnis.

München, Beck, 1931, pp. xi, 201, ills., tabls.

Gouge, A. Some aspects of the design of sea-going aircraft.

Flight, No. 1151,1152, Vol. 23, No. 3,4 (Jan. 16, 23,1931), London, pp. 59-64,83-86, ills., diagrs. Journ. Roy. Aer. Soc, Vol. 35, No. 245 (May 1931), London, pp. 341-371, ills., diagrs.

Gough, H. J., and H. L. Cox. The behaviour of a single crystal of antimony subjected to alternating torsional stresses.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 978-993, ills., diagrs., tabls. Rep. Mem. No. 1323. (M.69.)

- Further experiments on the behaviour of single crystals of zinc subjected

to alternating torsional stresses.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 956-975, ills., diagrs., tabls. Rep. Mem. No. 1322 (M. 68.)

- Mode of deformation of a single crystal of silver.

Aer. Res. Comm., Rep. Mem., No. 1385 (M. 70-T. 2974 & a), June 1930, London, 1931, pp. 13, ills., diagrs., tabls.

Gough, Melvin N. The variation in pressure in the cabin of an airplane in flight.

National Advisory Committee for Aeronautics, Technical Notes No. 368, March 24, 1931, Washington, March 1931, pp. 6, ills., diagrs.

Gould, Bruce. See Fokker, Anthony Herman Gerard, and Bruce Gould: Flying Dutchman; the life of Anthony Fokker.

Goupil, Alexander. See Zahm, Albert Francis: Alexander Goupil, inventor of three-torque airplane control.

Governors Island. See United States Congress. House. Committee on Military Affairs: Increase flying-field area of Governors Island, N.Y. ... Report to accompany H.R.137.

Grace, Dick. (Richard Virgil Grace) I am still alive.

New York, San Francisco, Rand, McNally and Company, 1931, pp. 255, ills. Introduction by William Wellman.

Graf Zeppelin. Graf Zeppelin in England.

Flight, No. 1183, Vol. 23, No. 35 (Aug. 28,1931), London, pp. 853-854, 855-856, ill.

- Transatlantique de l'air.

L'Aérophile, 39e année, No. 10 (15 oct. 1931), Paris, p. 290, ill.

- The visit of the Graf Zeppelin.

Aeroplane, Vol. 41, No. 9 (Aug. 26, 1931), London, pp. 518-522, ills. Flight, No. 1182, Vol. 23, No. 34 (Aug. 21,1931), London, pp. 830-831, ills.

- The Zeppelin arctic expedition.

Aeroplane, Vol. 41, No. 5, 6 (July 29, Aug. 5,1931), London, p. 327, 340.

- See Derstroff, Hanns: Die polarfahrt des "Graf Zeppelin." "SOS

Nautilus" kein "Stop Zeppelin."

- See Kohl-Larson, Ludwig: Die arktisfahrt des "Graf Zeppelin", im

auftrage der Internationalen Gesellschaft zur Erforschung der Arktis mit Luftfahrzeugen (Aeroarctic).

- See Kohrs, W.: Nautilus und Zeppelin.

- See Moltschanoff, P.: Polarfahrt im Nebel. Wolkenstudien während der

Polarfahrt des Luftschiffs "Graf Zeppelin."

- See Moleyns, A. F. de: Round Britain in fhe "Graf Zeppelin."

- See Sturm, Fritz, und M. Schirmer: Triebwerkanlage mit Vorgelege im

Luftschiff "Graf Zeppelin."

69261—35-8

Gragg, Charles Insco, and Malcolm Perrine McNair. Cases on marketing airplanes.

New York, McGraw-Hill, 1931, pp. 385. Harvard Business Reports, Vol. 10.

Graham, William T. Plane solves time.

Airway Age, Vol. 12, No. 3 (Mar. 1931), New York, pp. 269-270, ills.

Granger, James E. The spectators' viewpoint.

Western Flying, Vol. 10, No. 4 (Oct. 1931), Los Angeles, Calif., pp. 16-17.

Grant, A. J. Making a compressed-air tunnel. An account of the methods adopted in constructing the steel shell for the new tunnel at Teddington. Aircraft Engineering, Vol. 3, No. 26 (April 1931), London, pp. 93-96, ills., diagrs.

Grant, Hugh Duncan. Reading the weather map.

Airway Age, Vol. 12, No. 2 (Feb. 1931), New York, pp. 146-148, ills.

Grantham, Frederick W. Safety in the air.

Los Angeles, California, The Wolfer Printing Company, 1931, pp. 203, ills.

Granville, Z. D. Gee Bee super-sportster. Winner of the Thompson trophy at 236.24 M.P.H.

Aero Digest, Vol. 19, No. 4 (Oct. 1931), New York, pp. 70-72, ills.

Graves, W. H. Aircraft Diesel engine fuels.

Proc. Amer. Petr. Inst., Vol. 11, No. 73 (Dec. 31, 1930), New York, pp. 53-57, ills.

Gray, B. E. Surfacing the small airport.

Airport Section, Western Flying, Vol. 9, No. 2 (Feb. 1931), Los Angeles, Calif., pp. 85-86, ills.

Gray, Mrs. Edith (Stearns). "Up"; a true story of aviation.

Strasburg, Va., Shenandoah Publishing House, inc., 1931, pp. xv, 384, ills.

Great Britain. Agreement between His Majesty in respect of the. United Kingdom and the President of the German Reich amending the agreement of June 29, 1927 relating to air navigation. Berlin, July 5, 1930. Ratifications exchanged at Berlin, May 6, 1931.

London, H. M. Stationery Office, 1931, pp. 5. Foreign Office. Treaty series No. 26 (1931). Cmd. 3880.

- Air estimates.

Flight, No. 1159, Vol. 23, No. 11 (March 13, 1931), London, pp. 231-234.

- The air estimates. Mr. Montague's speech in the house of commons.

Flight, No. 1161, Vol. 23, No. 13 (March 27, 1931), London, pp. 280-282.

- Air Ministry. The air pilot.

Published by order of the Air Council. London, His Majesty's Stationery Office, 1931, Vol. 1, ills., tabls. 2d impression (1931), incorporating supplements No. 1-16.

- Air Ministry. Manual for medical officers of the Royal Air Force . . .

2nd edition 1931.

London, His Majesty's Stationery Office, 1931, 258. Air Publication 1269.

- Air Ministry. A manual of rigging for aircraft.

London, His Majssty's Stationary Office, 1931, pp. 180, diagrs. 2nd edition February 1931. Air Publication 1107.

- Air Ministry. The Mark I Atlas army cooperation aeroplane. With an

appendix on the Atlas dual control aeroplane. Vol. 1.

London, His Majesty's Stationery Office, 1931, pp. 92, ills., diagrs. 2nd edition May 1931. Air Publication 1375.

- Air Ministry. The Moth two-seater light aeroplane. Gipsy Mark I .

engine.

London, His Majesty's Stationery Office, 1931, pp. 72, ills., diagrs. Air Ministry. Issued October, 1931. 1st edition June 1931. Air Publication 1422, Vol. 1.

re at Britain. Air Ministry. Parachute manual.

London, His Majesty's Stationery Office, 1931, pp. 112, diagrs., ills. 2nd edition, May 1931. Air Publication 1182.

— Air Ministry. Permanent commissions in the General Duties Branch of the Royal Air Force. Regulations for appointment of university candidates.

London, 1931. Air publication 904. 4th edition, May 1931.

— Air Ministry. Regulations and schedule of charges in respect of the testing of material, instruments, gauges, etc., at the A.LD. test house.

London, His Majesty's Stationery Office, 1931. 2d edition July 1931. Air publication 1226.

— Air Ministry. Regulations for University Air Squadrons.

London, His Majesty's Stationery Office, 1931, pp. 16. 1st edition, Aug. 1930. Air Publication 1401.

— Air Ministry. Report on the health of the Royal Air Force for the year 1930.

London, His Majesty's Stationery Office, 1931. Air Publication 1427.

— Air Ministry. Report on the Royal Air Force promotion exams B and C held on the 2nd, 3rd, 4th and 5th Sept. 1930.

London, His Majesty's Stationery Office, 1931. Air Publication 1410.

— Air Ministry. Report on the Royal Air Force promotion exams B, C, E and F held on 3rd, 4th, 5th and 6th March 1931, with copies of the exam papers and examiners' remarks thereon.

London, His Majesty's Stationery Office, 1931. Air Publication 1424.

— Air Ministry. Royal Air Force. Flying training manual. Part I. Flying instruction . . . Reprinted Sept. 1931.

London, His Majesty's Stationery Office, 1931, pp. 238, ills., diagrs. Air Publication 129.

— Air Ministry. Royal Air Force aircraft route book . . . Air Ministry.

London, His Majesty's Stationery Office, 1931, 2 vols., plates, maps, tabls.

— Air Ministry official notices. Instructions to aircraft owners and ground engineers regarding essential modifications.

Aircraft Engineering, Vol. 3, No. 31 (Sept. 1931), London, pp. 230.

— Anti-aircraft gun and instrument drills (mobile and semi-mobile), 1931. The War Office.

London, His Majesty's Stationery Office, [printed by William Clowes and Sons, ltd.], 1931, pp. x, 148, ills.

— Het Britsche luchtschepen-programma.

Het Vliegveld, 15de Jaarg., No. 6 (Juni 1931), Amsterdam, p. 211.

— Conditions of service of women staff employed in the Navy, Army, and Air Force institutes. Report of committee appointed by the Minister of Labor.

London, His Majesty's Stationery Office, 1931, pp. 112. Parliament. Papers by command. Cmd. 3769.

— Convention between His Majesty, in respect of the United Kingdom

and of India, and the King of Italy respecting air transport service . Rome, May 16, 1931. [This convention has not been ratified by His Majesty.]

London, His Majesty's Stationery Office, 1931, pp. 17. Parliament. Papers by command. Cmd. 3892.

at Britain. Convention between His Majesty, in respect of the United Kingdom, and the President of the Hellenic Republic respecting air transport services. Athens, April 17, 1931. [This convention has not been ratified by His Majesty.]

London, His Majesty's Stationery Office, 1931, pp. 11. Foreign Office, Greece No. 1 (1931).

Parliament. Papers by Command. Cmd. 3889.

Exchange of notes between His Majesty's governments in the United Kingdom, Canada, the Commonwealth of Australia, New Zealand, and the Union of South Africa and the Government of India, and the Italian government respecting documents of identity for aircraft personnel. London, April 13, 1931.

London, H. M. Stationery Office, 1931, pp. 6. Foreign Office. Treaty series No. 24 (1931). Cmd. 3855.

La fotografia aerea nell'aviazione britannica.

Riv. Aer., Anno 7, n. 7 (luglio 1931) Roma, pp. 97-100, ills.

424 Mill. RM für die englische Luftfahrt.

Luftschau, 4. Jahrg., Nr. 6 (24. März 1931), Berlin, p. 42.

Grossbritannien. Ausführungsbestimmungen. Vom 20. Dezember 1930 zur britischen Luftfahrtverordnung vom 19. Dezember 1923.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 6-7 (14. Feb. 1931), Berlin, pp. 38-40.

Increased armament for British military aeroplanes.

Illustrated London News, Vol. 88, No. 2289 (Mar. 7,1931), London, p. 361, ill. Machine guns fitted to leading edge converging on a target.

Instructions for practice, anti-aircraft artillery. 1931 . . . The War Office, 28th February, 1931.

London, His Majesty's Stationery Office, [printed by William Clowes and Sons, ltd.,] 1931, pp. 20, ills., tabls.

Nachtflugübungen. London, Flughafen. Zollflughäfen. Verordnung. Nachrichten für Luftfahrer, 12. Jahrg., Nr. 5 (31. Jan. 1931), Berlin, pp. 27-29.

On British airmindedness.

Aeroplane, Vol. 40, No. 19 (May 13,1931), London, pp. 857-858, 860, 862, ill.

On the air debate.

Aeroplane, Vol. 40, No. 12 (March 25, 1931), London, pp. 493-494, 496, 498, 500-501.

On the air estimates.

Aeroplane, Vol. 40, No. 10 (March 11,1931) London, pp. 401-402, 404, 408, 408, 410, 412.

On the air estimates again.

Aeroplane, Vol. 40, No. 13 (April 1, 1931), London, pp. 541-542, 544, 546, 548, 550.

On the best British aviator.

Aeroplane, Vol. 41, No. 23 (Dec. 2,1931), London, pp. 1257-1264, port., ill. H. J. L. Hinkler.

Report of the R. 101 inquiry. Presented by the Secretary of State for Air to Parliament by command of His Majesty, March 1931. London, H. M. Stationery Office, 1931, pp. 129, ills., diagrs.

Court of inquiry into the loss of R. 101. Report of an investigation into the causes and circumstances of the accident which occurred on October 5th 1930, near Beauvais, France to the British airship R. 101.

Parliament. Papers by command, Cmd. 3825.

Signale zwischen Luftfahrzeugen und Schiffen. Kairo-Kapstadt, Luftverkehr. Jersey, Verordnung.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 9 (28. Feb. 1931), Berlin, pp. 53-56.

Verordnung. Britische Luftfahrt Verordnung vom 19. Dezember 1923. unter Berücksichtigung der bis einschliesslich 1930 vorgenommenen Abänderungen.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 1, 4 (3. 24. Jan. 1931), Berlin, pp. 2-6, 21-24.

Great Britain. See Buenos Aires: The British aircraft industry at Buenos Aires.

- See Buenos Aires: British Empire trade exhibition Buenos Aires 1931.

- See Buenos Aires: Buenos Aires. The Prince opens the exhibition.

- See Cesar: Englandflug des deutschen Luftfahrtverbandes.

- See Cranwell: Regulations for admission to the Royal Air Force College,

Cranwell . . .

- See Freeman, William Marshall: Air and aviation law (civil aviation)

being an exposition of the statute and case law affecting air navigation.

- See Greece: British aircraft for Greece. Fairey Company's substantial

order.

- See Hegener, Henri: De jaarlijksche gloriedag der Britsche luchtmacht.

- See Lamarche, Paul E.: Observation and bombing airplanes of Great

Britain.

- See McCudden, James Thomas Byford: Flying fury.

- See Mettam, H. A.: Performance requirements for airworthiness in Great

Britain and the U.S.A.

- See Prince of Wales: The Prince's home flight: The final stage of the historic

flight.

- See Sims, C. A.: British aircraft illustrated.

- See Snowden Gamble, Charles Frederick: The air weapon, being some

account of the growth of British military aeronautics from the beginnings in the year 1783 until the end of the year 1929.

- See South America: British activities in South America.

- See Treusch von Buttlar-Brandenfels, Horst: Zeppelins over England.

Greece. British aircraft for Greece. Fairey Company's substantial order. Flight, No. 1160, Vol. 23, No. 12 (March 20, 1931), London, pp. 252-253, ills.

- Sperrgebiete. Verordnung vom 24. November 1930 betreffend Festsetzung

der für die Luftfahrt verbotenen Zonen.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 12 (21. März 1931), Berlin, pp. 73-76, maps.

- Verordnung vom 24. November 1930 betreffend Benachrichtigung wegen

Ueberfliegens oder Landung auf griechischem Staatsgebiet durch Privatflugzeuge.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 5 (31. Jan. 1931), Berlin, p. 31.

- Vorschriften betreffend den Besuch ausländischer Luftfahrzeuge in Griechenland.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 1 (3. Jan. 1931), Berlin, pp. 7-8.

- See Great Britain: Convention between His Majesty, in respect of the

United Kingdom, and the President of the Hellenic Republic respecting air transport services. Athens, April 17, 1931. [This convention has not been ratified by His Majesty].

Green, E. Ramsay, and L. M. J. Balfour. An invitation to visit Yugoslavia. Aeroplane, Vol. 40, No. 18 (May 6,1931), London, pp. 831-832.

Green, J. J. Breakaway of boundary layer on a cylinder and an aerofoil.

Aer. Res. Comm., Rep. Mem., No. 1396 (Ae. 517-T.2934a), May 1930, London, 1931, pp. 3, ills.

- The viscous layer associated with a circular cylinder.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 256-289. ills., diagrs., tabls. Rep. Mem. No. 1313 (Ae. 452.)

Green, W. Sanger. A profitable airport.

Airway Age, Vol. 12, No. 4 (Apr. 1931), New York, pp. 362-364, ill.

Greene, Lewis. Aviation register . . .

Chicago, ill., Aviation Register, 1931- 3 numbers a year.

Greene, Warwick. Letters of Warwick Greene, 1915-1928, edited by Richard W. Hale.

Boston and New York, Houghton Mifflin Company, 1931, pp. xxiv, 309, ills.

Greener, F. W. G. See Bradfield, F. B., and F. W. G. Greener: Wind tunnel test of the increased drag of a quarter scale float on adding rivets.

Greenland. See Ahrenberg, Albin: En solskensflygning Grönland-Island 1931.

Gregg, Willis Rat.

Some observations of a weather man in Europe.

U.S. Air Services, Vol. 16, No. 6 (June 1931), Washington, pp. 25-28.

Grey, Charles Grey. Air Force training. Introduction. Aeroplane, Vol. 41, No. 1 (July 1,1931), London, p. 39.

Grey, Charles Grey, and Leonhard Bridgeman. All the world's aircraft 1930. London, Sampson Low, Marston & Company.

Grey, Charles Grey. Europe in 1930-31.

Airway Age, Vol. 12, No. 1 (Jan. 1931), New York, pp. 62-67, ills.

- On a last testament.

Aeroplane, Vol. 40, No. 21 (May 27, 1931), London, pp. 961-962, 964, 966.

- On calling a bluff.

Aeroplane, Vol. 40, No. 15 (April 15,1931), London, pp. 641-642, 644, 646.

- On errors of judgment—I, II, III.

Aeroplane, Vol. 41, No. 20, 21, 22 (Nov. 11, 18, 25, 1931), London, pp. 1101-1106, 1161-1166, 1209-1212.

- On getting back to work—I, II, III, IV, V.

Aeroplane, Vol. 41, No. 13,14,15,16,17 (Sept. 23, 30, Oct. 7,14, 21,1931), London, pp. 761-766, 801-804, 853-858, 905-912, 953-960.

- On the great international aviation week.

Aeroplane, Vol. 41, No. 18, 19 (Oct. 28, Nov. 4, 1931), London, pp. 1001-1010, 1060-1062, ills.

- See McCudden; James Thomas Byford: Flying fury.

Grindley, G. C. Reports of the Committee upon the Physiology of Vision. IX, Psychological factors in peripheral vision.

Privy Council, Medical Research Council, London, Published by His Majesty's Stationery Office, 1931, pp. 49, ills. Special Report Series, No. 163.

Groenhoff, Günther. 265 km motorlos.

Luftschau, 4. Jahrg., Nr. 11 (10. Juni 1931), Berlin, p. 82.

Grogan, J. D. See Rosenham, W., J. D. Grogan, and T. H. Schofield: Gas removal and grain refinement in aluminium alloys.

- See Rosenhain, W., J. D. Grogan, and T. H. Schofield: The influence of

Titanium Tetrachloride on cast aluminium alloys.

Grogan, J. D., and T. H. Schofield. Report on some properties of alloys of aluminium with thorium and silicon.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 1012-1023, ills., diagrs., tabls. Rep. Mem. No. 1253. (M. 64).

Gronau, Wolfgang von. Seeflugzeug und Schiff.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 17., 22. Heft (14. Sept., 28. Nov. 1931), München und Berlin, pp. 519-524, 663-664, ills.

- Wolfgang von Gronaus Nordatlantik-Forschungsflug.

Luftschau, 4. Jahrg., Nr. 18 (24. Sept. 1931), Berlin, pp. 65-67.

Grose, Parlée Clyde. The problem of vertical flight.

McComb, O., General Publishing Company, 1931, pp. 128, ill.

Gross, Gerald C. Aviation radio in Europe.

Aviation, Vol. 30, No. 2 (Feb. 1931), New York, pp. 84-86.

Ground school. How much ground school.

Western Flying, Vol. 9, No. 6 (June 1931), Los Angeles, Cal., pp. 42-44, diagrs.

Groves, P. R. C. See Bouché, Henri, et P. R. C. Groves: Études sur la situation économique, administrative et juridique de la navigation aérienne internationale.

Grüber, O. v. Traité de photogrammétrie aérienne et terrestre. Traduction française par A. Ansermet.

Lausanne, Éditions La Concorde, 1931, pp. 422, ills.

Grunau-Baby. See Kromer, Hugo H.: Das kleine Leistungs-Segelflugzeug "Grunau-Baby."

Gruschwitz, E. Die turbulente reibungsschicht in ebener Strömung bei druckabfall und druckansteig.

[Leipzig, 1931], pp. 321-345, diagrs. Sonderdruck aus Ingenieur-Archiv ... Berlin.

Grzeszczyk, Sczzepan. Pomiary rozkladu ciáieú za ámiglem. (Mesures de la répartition des pressions derrière l'hélice).

Instytut Badan Technicznych Lotnictwa, Sprawozdanie, Bulletin No. 7, Nr. 34, War-szawa, 1931, pp. 10-22, ills., diagrs., tabls.

G. 38. El "G. 38" y el "Do.X" en España.

Ibérica, Año 18, Num. 860 (10 enero 1931), Barcelona, pp. 18-21, ills.

Guerendiain, Antonio. Recientes perfeccionamientos del motor de explosión, principalmente en sus aplicaciones a la aviación.

Ibérica, Año 18, Núm. 887 (18 julio 1931), Barcelona, pp. 60-62, ill.

Guerra, U. Note sulla trasmissione delle immagini dagli aerei alla terra e viceversa.

L'Aerotecnica, Vol. 11, N. 5 (mag. 1931), Roma, pp. 533-556, ills. English abstract pp. 693-694.

GuERRiTORE, Carlo. Alcune predisposizioni ed alcune norme da osservarsi per l'occultamento all'indagine ed alla offesa aerea dell'organizzazione e dell funzionamento logistico di un'armata in linea.

Riv. Aer., Anno 7, N. 11 (nov. 1931), pp. 223-246, ills.

- L'aviazione ausiliaria per il R. Esercito.

Riv. Aer., Anno 7, No 5 (mag. 1931), Roma, pp. 215-234.

Guet, G. See Lainé, André: Comment devenir aviateur; formalités à remplir—-examens à passer—écoles à choisir—les principes de pilotage,

Guibert, M. La stabilité statique dans le vol avec moteur.

L'Aéronautique, 13me année No. 140, Bulletin L'Aérotechnique, 9e année, No. 96-97 (jan. 1931), Paris, pp. 11-19, diagrs.

Guider, John W. The juridical congress on wireless telegraphy at Liège. Air Law Review, Vol. 2, No. 1 (Jan. 1931), New York, pp. 1-8.

- The Liege congress of the international committee on wireless telegraphy.

Journal of Air Law, Vol. 2, No. 1 (Jan. 1931), Chicago, pp. 38-43.

Guides. Guide aérien.

Clermont-Ferrand, Michelin & Cie.

- Guide du touriste aérien et des clubs d'avions de tourisme.

Paris, Blondel La Rongery.

- International air guide; the reference book on civil and commercial aviation. Air atlas.

Paris, imprimerie Crété s.a. [1931], 1 vol., ills., maps.

- See Fédération Aéronautique Internationale: International air guide;

the reference book on civil and commercial aviation. Air atlas.

- See Gulf Refining Company: Aviation atlas.

Guidi, G. La corrosione dei materiali impiegati nelle construzioni aeronautiche. Ingegnere, Vol; 5, No. 3 (marzo 1931), Roma, pp. 153-163, ills.

Guillemin. The Guillemin J. G. 10 (French), a two-place touring low-wing monoplane.

National Advisory Committee for Aeronautics, Aircraft Circulars No. 153, Nov. 12, 1931, Washington, November 1931, pp. 4, ills.

Guinotte, Jules. Aviation insurance.

Airway Age, Vol. 13, No. 14 (Oct. 3,1931), New York, pp. 274-276.

Gulf Refining Company. Aviation atlas.

Pittsburgh, Pa., Gulf Refining Company, 1931, pp. 20, ills., diagrs.

Gull-Type. See Poland: Polish P type single-seat fighters. All-metal Gull-type wing monoplane.

Gunn, Donald L. The function of the air sacs of insects.

Nature, Vol. 127, No. 3193 (Jan. 10,1931), London, pp. 58-59.

Gustosa, Corrado. Da Amsterdam a Lisbona a bordo del Do X. Riv. Aer., Anno 7, N. 4 (aprile 1931), Roma, pp. 23-89, ills., tabl.

Gutkowski, Tadeusz. Metoda okreslenia mnoznika oéwietlenia przy uzyciu filtrôw barwnych w fotograji lotnicej.

Instutut Badan Technicznych Lotnictwa, Sprawozdanie kwartalne, Nr. 3, Warszawa, 1930, p. 31.

- Pomiar wysokoéci samolotôw przy starcie.

Instytut Badan Technicznych Lotnictwa, Sprawozdanie kwartalne Nr. 2, Warszawa, 1930, pp. 8-9, ills.

- Pomiar wysokoéci samolotôw przy starcie (opis aparatôw).

Instytut Badan Techniczynch Lotnictwa, Sprawozdanie kwartalne Nr. 4, Warszawa, 1930, pp. 23-27, ills.

- W sprawie pomiarôw wysokoéci samolotôw przy starcie. (Sur mesure de

la hauteur des avions pendant le décollage).

Instytut Badan Techniczych Lotnictwa, Sprawozdanie, Bulletin No. 6, (Nr. 32); Warszawa, 1931, pp. 101-103, ill.

Gutkowski, Tadeusz. TeoTJa akomodacji barwnej oka, zaobserwowanej przez prof. Polack'a.

Instytut Badan Technicznych Lotnictwa, Sprawozdanie kwartalne Nr. 5, (Nr. 25), War-szawa, 1931, pp. 86-90, diagrs.

--Wplyw gruboéci ziarna emulsji fotograficznej na budowç aparatu fotolot-

niczego. (L'influence de la grosseur du grain de l'émulsion photographique sur la construction de l'appareil photoaérien).

Instytut Badan Technicznych Lotnictwa, Sprawozdanie, Bulletin No. 6, (Nr. 31), War-szawa, 1931, pp. 97-100, ills.

GuzzoNi, G., e E. Nardi. La corrosione dei metalli e leghe usati in aeronautica. L'Aerotecnica, Voi. 11, No. 1 (gen. 1931), Roma, pp. 50-77, ills., diagrs., tabls. English abstract pp. 144-146.

- La saldatura dei materiali metallici, le sue applicazioni nelle costruzioni

aeronautiche.

L'Aerotecnica, Vol. 11, N. 3 (marzo 1931), Roma, pp. 269-309, ills., diagrs., tabls. English abstract pp. 389-390.

Gyroplane. See Kiemin, Alexander, and B. P. Ruffner: A new type of gyroplane. Wind tunnel researches and full scale tests with a gyroplane with rigidly connected feathering rotor blades.

Gyroscopic control. See Marmonier, L.: La stabilità e il comando automatico dei velivoli.

Gyroscopes. See Leva, Fausto M.: Le applicazioni del giroscopi sul mare e nell'aria.

H

H. Havens voor luchtschepen.

Het Vliegveld, 15de Jaarg., No. 4 (April 1931), Amsterdam, pp. 118-123, ills.

- See Gates, S. B.: Measured spins on aeroplane H.

H. B. L'activité aéronautique.

L'Illustration, 89e année, No. 4598 (18 avril 1931), Paris, p. 473, ill.

- Per vliegtuig van Zuid- near Noord Amerika.

Het Vliegveld, 15de Jaarg., No. 5 (Mei 1931), Amsterdam, pp. 160-163, ills., map.

H., H. Achter de schermen van de Holland-Indië lijn.

Het Vliegveld, 15de Jaarg., No. 8 (Sept. 1931), Amsterdam, pp. 324-328, maps.

- De eerste slachtoffers der luchtvaart.

Het Vliegveld, 15de Jaarg., No. 2 (Feb. 1931), Amsterdam, pp. 53-57, ills.

- Dek-vliegen.

Het Vliegveld, 15de Jaarg., Nos. 4, 5 (Aprii, Mei 1931), Amsterdam, pp. 137-141, 169-175, ills.

- Professor Piccard over zijn hoogtevaart. Gevangenen der stratosfeer.

Het Vliegveld, 15de Jaarg., No. 11 (Nov. 1931), Amsterdam, pp. 392-393, ills.

Haarmann, K. Die wirtschaftliche Grundlage des Betriebes von Leichtflugzeugen.

Luftschau, 4. Jahrg., Nr. 10,12 (24. Mai, 24. Juni 1931), Berlin, pp. 76, 91.

H addon, H. D. Structures. An introduction to aeronautical engineering. Vol. 2.

London, Gale & Polden, 1931, pp. 128, ills.

Haddon, J. D. See Engineering: An introduction to aeronautical engineering. For students engaged in all branches of aeronautical work, Vol. 2: Structures, by J. D. Haddon.

Haeder, W. See Thoelz, W., und W. Haeder: Flugmotoren in Leicht- und Schwerölbauart.

H aenni, P. M. La protection des alliages d'aluminium et l'alclad.

L'Aéronautique, 13me année, No. 140 (Jan. 1931), Paris, pp. 32-33, ills.

Haerter, Paul. Die luftgefahr. Aufklärung über luftangriffe und schutzmass-nahmen gegen ihre Wirkung.

München, Kellerer Verlag, 1931.

Hague. See Piercy, N. A. V.: The fifth air congress. The report of the papers read and discussions during the proceedings at the Hague.

Hahn, Kurt. Die deutschen luftVerkehrsabkommen. Würzburg, E. Mönnich, 1930, pp. 123.

Haifter, Mitchel. Fuel systems.

Aviation Engineering, Vol. 5, No. 4 (Nov. 1931), Washington, N.J., pp. 54-55, ill.

Haines, Lynn. The Lindberghs.

New York, The Vanguard Press, [1931], pp. 307, ports.

Hale, Richard Walden. See Greene, Warwick: Letters of Warwick Greene, 1915-1928, edited by Richard W. Hale.

Haley, R. Setting out taper ribs.

Aircraft Engineer, Flight Engineering Section, Suppl. to No. 1165, Vol. 23, No. 17 (April 24, 1931), London, pp. 362g-362h (31-32), diagrs.

Hall, Charles Ward. See K., A.: A novel plane.

Hall, Norman B. Coast guarding the air.

U.S. Air Services, Vol. 16, No. 2 (Feb. 1931), Washington, pp. 39-40.

Haller, Gus. The Haller-Hawk sailplane.

National Glider and Airplane News, Vol. 3, No. 2 (Sept. 1931), New York, pp. 19-20, ills.

Halliday, A. S., and C. H. Bürge. Lateral stability calculations for the Bristol fighter aeroplane.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 773-785, diagrs., tabls. Rep. Mem. No. 1306. (Ae. 446.)

Halliday, A. S. Stability derivatives of the Bristol fighter.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 759-772, diagrs., tabls. Rep. Mem. No. 1277. (Ae. 423.)

- See Bryant, L. W., and A. S. Halliday: Measurement of lateral derivatives

of the whirling arm.

Handasyde, G. H. Building amphibians at Cowes. Cantilever three-ply wings on straight frame metal hulls produced by Saunders-Roe. Aircraft Engineering, Vol. 3, No. 33 (Nov. 1931), London, pp. 275-278, ills.

- Building light aeroplane engines. The design and manufacturing processes of the Cirrus-Hermes engines examined and described.

Aircraft Engineering, Vol. 3, No. 31 (Sept. 1931), London, pp. 217-219, ills.

- Building radial engines. Central control and a high finish characterize

the Bristol Company's production.

Aircraft Engineering, Vol. 3, No. 29 (July 1931), London, pp. 163-166, ills.

- Light aeroplane production. A critical description of the De Havilland .

works and Moth construction.

Aircraft Engineering, Vol. 3, No. 28 (June 1931), London, pp. 131-133, ills.

Handasyde, G. H. Rolls-Royce aero-erigines. Reasons for the high standard of workmanship and efficiency at derby.

Aircraft Engineering, Vol. 3, No. 34 (Dec. 1931), London, pp. 307-312, ills., diagrs.

- Steel tube and strip. The works of Armstrong-Whitworth aircraft at

Coventry visited and described.

Aircraft Engineering, Vol. 3, No. 30 (Aug. 1931), London, pp. 191-193, ills.

- Welded tube construction. Fokker robustness and Avro ingenuity, with

wide use of jigs, at Manchester.

Aircraft Engineering, Vol. 3, No. 32 (Oct. 1931), London, pp. 249-251, ills.

Handbooks. See Bürge, Cyril G.: Handbook of aeronautics; a compendium of the modern practice of aeronautical engineering, containing over 500 graphs and diagrams, tables and formulae for the aeronautical engineer; published under the authority of the Council of the Royal Aeronautical Society.

Handel, Paul von. Untersuchhungen über das Verhalten von quarzgesteuerten Sendern.

Luftfahrtforschung, Band 8, Heft 5, 1930, München und Berlin, R. Oldenbourg, pp. 20, ills., diagrs., tabls.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 645-664, ills., diagrs., tabls.

- See Brintzinger, Wilhelm, Paul v. Handel und Henrich Viehmann: Erschütterungsstörungen bei ortbeweglichen Empfängern.

Handley Page. Trafikflygplanet "Handley Page 42."

Flygning, Arg. 9, N:R 1 (Jan. 1931), Stockholm, p. 4, ills.

- See Pleines, Wilhelm: Flugmessungen über den Einfluss von Handley-

Page-Schlitzquerrudern.

Hangars. See Cost, R. W.: Minimizing fire hazards in airplane hangars.

- See Dirigibles: Das Dock fur 2 Zeppeline und 4 Kleinluftschiffe.

- See Sylvester, Harold MacTavish: An investigation of pressures and vacua

produced on structures by wind.

- See Waddington, William H.: Reducing hangar costs.

Hann, George R. Approved versus unapproved flying schools.

Nat. Aer. Mag., Vol. 9, No. 4 (April 1931), Washington, pp. 29-32, ills.

Hannibal. " Meet Hannibal."

Flight, No. 1177, Vol. 23, No. 29 (July 17, 1931), London, pp. 700-702, ills.

Hanriot. The Hanriot H 431 military airplane (French). A general purpose biplane.

National Advisory Committee for Aeronautics, Aircraft Circulars No. 133, Jan. 31, 1931, Washington, January 1931, pp. 12, ills., tabl.

Hansen, Asmus. Thermodynamische Rechnungsgrundlagen der Verbrennungskraftmaschinen und ihre Anwendung auf den Höhenflugmotor. Berlin, VDI Verlag, pp. iv/28, ills.

Beilage zur "Forschung auf dem Gebiete des Ingenieurwesens"Bd. 2, Ausgabe B, Mai 1931.

Hansen, F. Der Statax-Halbdiesel-Flugmotor.

Schweizer Aero Revue, Vol. 6, No. 10 (Mai 15,1931), pp. 133-135, ills.

Hanson, Earl. Canadian Aviation—1930.

Airway Age, Vol. 12, No. 1 (Jan. 1931), New York, pp. 68-71, ills.

Hanson, Earl. Testing engines for A.T.C. Methods employed in tests at Arlington—equipment developed and used is described in this article. Airway Age, Vol. 12, No. 2 (Feb. 1931), New York, pp. 131-133, ills.

Hanst, Charles E. How to learn to fly.

Western Flying, Vol. 9, No. 5 (May 1931), Los Angeles, Calif., pp. 36-38, ills.

Hanworth. A parliamentary occasion at Hanworth.

Aeroplane, Vol. 40, No. 23 (June 10,1931), London, pp. 1098, 1100, ills.

Hardecker, John F. Felt in aircraft.

Aviation, Vol. 30, No. 6 (June 1931), New York, p. 369.

- The interior decorator has his day.

Aviation, Vol. 30, No. 2 (Feb. 1931), New York, pp. 105-109, ills.

- The spot welding of stainless steel.

Airway Age, Vol. 13, No. 1 (July 4,1931), New York, pp. 37-39, ills.

- Use of hardened self-tapping screws. Parts 1 and 2.

Airway Age, Vol. 12, Nos. 3, 4 (Mar., Apr., 1931), New York, pp. 245-249, 344-347, ills., tabl.

Hardy, J. K., and K. V. Wright. The automatic timing of aircraft over a speed course.

Aer. Res. Comm., Rep. Mem., No. 1343, (Ae. 475-T. 2995), February 1930. London, 1931, pp. 9, ills., diagrs. With an appendix by S. B. Gates.

Harmel, Falk. Breaking the endurance record for gliders.

U.S. Air Services, Vol. 16, No. 11 (Nov. 1931), Washington, D. C, pp. 40-41.

Harms, F. See Wien, Wilhelm..., und F. Harms: Handbuch der Experimentalphysik, Bd. 4, 1. Teil. Hydro- und aerodynamik.

Harper, Harry. By air from England to India.

Nat. Aer. Mag., Vol. 9, No. 5 (May 1931), Washington, pp. 27-29, ills.

Harriman, Edward A. Federal and state jurisdiction with reference to aircraft.

Journal of Air Law, Vol. 2, No. 3 (July 1931), Chicago, pp. 299-324.

Harriman, H. H. U.S.S. Akron, world's largest airship; complete pictures and the story of the dock, ship, airport, and " Lighter-than-air-center" of the world.

Akron, O., Akron Typesetting Company, 1931, pp. 43, ills.

Harris, Luther. Airline maintenance.

Aviation, Vol. 30, No. 12 (Dec. 1931), New York, p. 701.

- Keeping track of the maintenance dollar.

Aviation, Vol. 30, No. 9 (Sept. 1931), New York, pp. 525-528, ills.

Harris, R. G., and L. E. Caygill. Model tests on Supermarine S.4 seaplane. Effect of lowering wing.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, pp. 204-206, ills., tabls. R.A.E. Report No. B.A.550A.

Harris, R. G., L. E. Caygill, and R. A. Fairthorne. Wind tunnel experiments on steam condensing radiators.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 1293-1320, diagrs., tabls. Rep. Mem. No. 1326. (E. 37.)

- Wind tunnel tests on Gloster and Supermarine wing radiators.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, 1931, pp. 249-262, ills., diagrs., tabls.

Reports and Memoranda No. 1311. (Ae. 450.)

Harris, Thomas Aubrey. See Wenzinger, Carl Joseph, and Thomas A. Harris: The vertical wind tunnel of the National Advisory Committee for Aeronautics.

Harshman, Verne Warren. My five memorable days.

U.S. Air Services, Vol. 16, No. 6 (June 1931), Washington, pp. 30-32, ill.

Hart, Edward J. C. W. A. Scott.

Aeroplane, Vol. 40, No. 15 (April 15,1931), London, pp. 652, 654.

Hart, Morris D. The aeroplane as a source of sound.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 1360-1397, diagrs. Rep. Mem. No. 1310.

Hartman, F. V., and G. O. Hoglund. Forming of aluminum alloy sheet for aircraft.

Aviation Engineering, Vol. 5, No. 4 (Nov. 1931), Washington, N.J., pp. 36, 38, 40, ills., tabls-

Hartmann, E. C. Comparison of weights of 17ST and steel tubular structural members used in aircraft construction.

National Advisory Committee for Aeronautics, Technical Notes No. 378, May 19, 1931, Washington, May 1931, pp. 17, diagrs.

Hartmann, H. Deutsches Luftbildunternehmen in China. Luftschau, 4.Jahrg., Nr. 13 (10 Juli 1931), Berlin, p. 4.

Hartshorn, A. S. The application of the Servo principle to aileron operation.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 863-878, diagrs., tabls. Rep. Mem. No. 1262. (Ae. 411.)

- Fuselage interference effect. The available data points to conclusions

favourable to the high wing in monoplanes.

Aircraft Engineering, Vol. 3, No. 30 (Aug. 1931), London, pp. 201-203, ills.

—■— The influence of a fuselage on the lift of a monoplane.

Aer. Res. Comm., Rep. Mem., No. 1344 (Ae. 476-T.2988), May 1930, London, 1931, pp. 14, ills., diagrs., tabls.

- Test of a model of a Gloster high speed seaplane.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, pp. 225-229, diagrs., tabls. R.A.E. Report No. B.A. 668.

—«— Theoretical relationship for a wing with unbalanced ailerons.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 879-894, diagrs., tabls. Rep. Mem. No. 1259. (Ae. 408.)

- Wind tunnel test of a Gloster IV float.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, p. 207, tabl. R.A.E. Report No. B.A. 601.

- Wind tunnel tests of seven struts.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 635-646, diagrs., tabls. Rep. Mem. No. 1327. (Ae. 460.)

Harvey, H. G. Magnesium and its alloys in aircraft.

Metals & Alloys, Vol. 1, No. 8 (Feb. 1930), New York, pp. 365-367, ill., tabl.

Hatfield, W. H. Rustless steels as applied to automobiles and aircraft.

Flight, No. 1158, Vol. 23, No. 10 (March 10, 1931), London, pp. 214-215, diagr., tabl.

Haus, Fr. Partances élevées et profils hypersustentateurs.

L'Aéronautique, 13me année, No. 143, Bulletin L'Aérotechnique, 9e année, No.100 (avril 1931), Paris, pp. 125-131, ills., diagrs.

- The use of slots for increasing the lift of airplane wings.

National Advisory Committee for Aeronautics, Technical Memorandums No. 635, Aug. 27, 1931, Washington, August 1931, pp. 15, diagrs.

Haus, Fr. L'utilisation pratique des procédés d'hypersustentation.

L'Aéronautique, 13me année, No. 145, Bulletin L'Aérotechnique, 9e année, No. 102 (juin 1931), Paris, pp. 205-213, ills., diagrs.

Haus, Frederic Ch. Stabilité et maniabilité des avions. Paris, Gauthier-Vülars et Cie., 1930, pp. 320, ills., diagrs.

Havana. See Cassidy, Louis C: Does the Havana aerial convention fulfill a need?

- See International American Conference: Commercial aviation. Convention between the United States of America and other American republics. Signed at Habana, February 20, 1928.

- See Latchford, Stephen: Habana convention on commercial aviation.

Havelock, T. H. Stability of motion of rectilinear vortices in ring formation. Philosophical Magazine, Vol. 11, No. 70 (Feb. 1931), London, pp. 617-633.

Hawaii. Hawaii: Annual report of the Chairman, Territorial aeronautical Commission, July 1, 1930-June 30, 1931.

Pp. 4-7.

- See Coffin, Harold: Wings for Hawaii.

Hawkins, Walter B. Profits from sales.

Western Flying, Vol. 10, No. 1 (July 1931), Los Angeles, Calif., pp. 35-37.

- See Erickson, Ed. L., and Walter B. Hawkins: Reduced-rate aircraft

merchandising.

Hawks, Ellison. The romance of transport.

New York, Thos. Y. Crowell Co., 1931, pp. 332. Chapter 16: The story of the airship, pp. 279-296. Chapter 17: The story of the aeroplane, pp. 297-309. Chapter 18: Air transport to-day, pp. 310-327.

Hawks, Frank. Navigation à la slide rule.

Western Flying, Vol. 10, No. 6 (Dec. 1931), Los Angeles, Calif., p. 33, ill.

- Speed.

New York, Brewer, Warren & Putnam, 1931, pp. 314, ills.

- What kind of surface a pilot wants.

Airport Section, Western Flying, Vol. 9, No. 6 (June 1931), Los Angeles, Calif., pp. 83-84, port.

Hayes, Robert. Alaska-Washington.

Airway Age, Vol. 13, No. 1 (July 4, 1933), New York, pp. 40-43, ills.

- New use for planes. Aerial advertising work in single ship brings in

revenues as high as $35 an hour—Northwest Airways has special service.

Airway Age, Vol. 12, No. 2 (Feb. 1931), New York, pp. 144-145, ill.

Haynes, Grissom E. Cockpits and crashes.

Aviation, Vol. 30, No. 5 (May 1931), New York, pp. 309-310.

Haynes, H. Gene. Indianapolis municipal airport.

Aero Digest, Vol. 19, No. 4 (Oct. 1931), New York, p. 58, ill.

Heat. See Elias, Franz: The transference of heat from a hot plate to an air stream.

- See Fage, A., and V. M. Falkner: Relation between heat transfer and

surface friction for laminar flow.

- See Jones, E. T.: Drag and heat dissipation of three radiator systems.

Heat transmission. See Cope, W. F.: Heat transmission between surfaces and fluids flowing over them. (1) The case of two-dimensional flow.

Heaters. See Blackburn, E. C. Jr.: Heat and ventilation.

Hegener, Henri. De Akron. Het grootste luchtschip der wereld.

Het Vliegveld, 15de Jaarg., No. 8 (Aug. 1931), Amsterdam, pp. 275-280, ills.

- Een Zeppelin-dienst op Indie.

Het Vliegveld, 15de Jaarg., No. 4 (April 1931), Amsterdam, pp. 114-115.

- De jaarlijksche gloriedag der Britische luchtmacht.

Het Vliegveld, 15de Jaarg., No. 7 (Juli 1931), Amsterdam, pp 242-246, ills.

- Taalzuivering.

Het Vliegveld, 15de Jaarg., No. 1 (Jan. 1931), Amsterdam, pp. 2-3.

- De travel-air eendekker, Type R.

Het Vliegveld, 15de Jaarg., No. 6 (Juni 1931), Amsterdam, pp. 198-200, ills.

- Uit de eerste jaren der militaire luchtvaart.

Het Vliegveld, 15de Jaarg., No. 7, 8 (Juli, Aug. 1931), Amsterdam, pp. 232-236, 282-284, ills.

- Uit de valscherm-wereld.

Het Vliegveld, 15de Jaarg., No. 11 (Nov. 1931), Amsterdam, pp. 385-388, ills. Has illustration of wind tunnel for testing parachute models.

- Wat aan den weekdienst voorafging. Het tijdperk der plannen en

pioniersvluchten.

Het Vliegveld, 15de Jaarg., No. 9 (Sept. 1931), Amsterdam, pp. 313-318, ills.

Heidengren, Gabr. Flygstambanorna.

Flygning, Arg. 9, N:R 1 (Jan. 1931), Stockholm, pp. 12-14, map.

Heinen, Anton. See K., A.: A sportsman's airship.

Heinkel. Heinkel amphibion.

Aero Digest, Vol. 18, No. 6 (June 1931), New York, pp. 82-84, ills.

- Heinkel HE 57 "Amphibie." Sächsisches Verkehrsflugzeug.

Luftschau, 4. Jahrg., Nr. 1 (10. Jan. 1931), Berlin, p. 5, ill.

- See Mock, Richard M.: Heinkel plane on the S.S. Europa.

Heinkel, Ernst, flugzeugwerke, g.m.b.h. Katapulte und katapultieren von flugzeugen.

München, J. G. Weiss'sche Buchdruckerei, 1931, pp. 98, ills., diagrs.

Heinze, Edwin P. A.

The "Deutschlandflug, 1931."

Flight, No. 1183, Vol. 23, No. 35 (Aug. 28, 1931), London, pp. 863-867, ills.

- Experiments with rockets.

Aero Digest, Vol. 18, No. 6 (June 1931), New York, pp. 40,138.

- Focke-Wulf canard monoplane.

Aero Digest, Vol. 18, No. 1 (Jan. 1931), New York, pp. 72, 74, ills.

- The Focke-Wulf "Ente."

Flight, No. 1149, Vol. 23, No. 1 (Jan. 2, 1931), London, pp. 4-8, ills.

- German transport airplanes. Parts I-VI.

Aero Digest, Vol. 19, No. 1-6 (Aug.-Dec. 1931), New York, pp. 82-86,50-52, 56-60,78-80,44-46, 57-59, ills.

Heinze, Edwin P. A. The new Argus 8-cyl. engine.

Flight, No. 1180, Vol. 23, No. 32 (Aug. 7, 28, 1931), London, p. 788, ill.

- The new Dornier landplane.

Flight, No. 1192, Vol. 23, No. 44 (Oct. 30, 1931), London, pp. 1087-1089, ills.

- The new German " Tailless.''

Flight, No. 1189, Vol. 23, No. 41 (Oct. 9, 1931), London, pp. 1008-1009, ills.

Helbig, Hans. Der Flugzeugbeobachter. Versuch einer Methodik zur Ausbildung im Orten.

Luftschau, 4. Jahrg., Nr. 2 (24. Jan. 1931), Berlin, p. 13.

- Jahres-Statistik 1930 (vom. 1. 1. bis 31. 12. 1930) des Jugend- und Segelflugausschusses des DLV.

Luftschau, 4. Jahrg., Nr. 8 (24. April 1931), Berlin, pp. 57-58, ill.

- Das Jungfliegertreffen und der Modell Wettbewerb für Segelflugmodelle

Pfingsten 1931 auf der Wasserkuppe.

Luftschau, 4. Jahrg., Nr. 11 (10. Juni 1931), Berlin, p. 83, ills.

Helicopters. Un projet d'avion hélicoptère à hélices orientables. L'Aérophile, 39e année, No. 11 (15 nov. 1931), Paris, p. 342, ill.

- Il velivolo-elicottero ad eliche orientabili.

Riv. Aer., Anno 7, No. 7 (lug io 1931), Roma, pp. 120-129, ills.

- See Italy: An Italian helicopter.

- See Liptrot, R. N.: Modern development in the helicopter.

- See Philipson, Filippo: La soluzione di un problema classico.

- See Pouit, R.: Un hélicoptère de 40 HP; le Pescara 4 S.

- See Torres, M. de: Ensayos del helicóptero Pescara en Barcelona.

Hélicostat. See Oehmichen: L'hélicostat Oehmichen.

- See Oehmichen: De Oehmichen hélicostat.

Helium. Helium.

Die Umschau, 35. Jahrg., Heft 17 (25. April 1931), Frankfurt, a. M., p. 338.

- Helium plant celebrates first birthday.

Scient. Amer., Vol. 144, No. 2 (Feb. 1931), p. 132. ills. Amarillo, Texas.

- More about helium.

Aeronautical Engineering, suppl. to the Aeroplane, Vol. 40, No. 4 (Jan. 28, 1931), London, p. 154.

Helly, E. See Lamb, H.: Lehrbuch der Hydrodynamik.

Helm. Ein Flug Berlin-Wien.

Luftschau, 4. Jahrg., Nr. 7 (10. April 1931), Berlin, pp. 50-51.

Helmbold, H. B. Goldstein's solution of the problem of the aircraft propeller with a finite number of blades.

National Advisory Committee for Aeronautics, Technical Memorandums No. 652, Dec. 23, 1931, Washington, December 1931, pp. 7, diagrs.

- Über die Goldsteinische Lösung des Problems der Luftschraube mit

endlicher Flügelzahl.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 14. Heft (28. Juli 1931), München und Berlin, pp. 429-432, diagrs.

Helmbold, H. B. Über Flugleistungstatistik.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 21. Heft (14. Nov. 1931), München und Berlin, pp. 629-636, diagrs.

- Über Messflüge zur Bestimmung von Stirnwiderstandsfläche und Vortriebswirkungsgrad.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 11. Heft (15, Juni 1931), München und Berlin, pp. 323-325, diagrs., tabls.

Helmore, W. Engine performance with gaseous fuels. Part I—Characteristics and engine performance of gaseous fuels obtained from oil.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 1188-1232, ills., diagrs., tabls. Rep. Mem. 1265 (E. 33.)

- Experiments on flame extinction in gaseous mixtures.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 1233-1248, diagrs., tabls. Rep. Mem. No. 1266. (E. 34.)

Hemmeter, G. T. See Spanogle, J. A., and G. T. Hemmeter: Development of an impinging-jet fuel-injection valve nozzle.

Henderson, John C, and Louis A. Orsatti. Official miniature aircraft instruction manual, written for Los Angeles Timesplayground Aircraft League. Los Angeles, Printed by the Times-Mirror Press, 1931, pp. 94, ills., diagrs.

Hennig, Richard.

Weltluftverkehr und Weltluftpolitik.

Berlin, Zentral-Verlag G.m.b.H., 1930, pp. 67, ills.

Weltpolitische Bücherei, herausgegeben von Adolf Grahowsky, Bd. 20.

Hbnrickson, H. B. Altitude flights.

Aero Digest, Vol. 18, No. 6 (June 1931), New York, pp. 42-43, 134, ills.

- More altitude flights.

Aero Digest, Vol. 19, No. 1 (July 1931), New York, pp. 36-37, 128, ill., diagr.

Henshaw, P. M. Air questions and answers.

London, Gale & Polden, ltd., 1931, pp. 194, ills. Edited by Major C. C. Turner.

- The romance of speed.

London, Gale and Polden, 1931.

Henson, William Samuel. See Davy, M. J. B.: Henson and Stringfellow, their work in aeronautics; the history of a stage in the development of mechanical flight, 1840-1868.

Hentschel. Neuer Segelflug-Record auf dem Dörnberggelände bei Kassel: 11 Std. 1. Min.

Luftschau, 4. Jahrg., Nr. 9 (10. Mai 1931), Berlin, p. 68.

Herman, R. See Schiller, Ludwig, and R. Herman: Resistance of plates and pipes at high Reynolds numbers.

Herrick, Jack. See Hirth, Wolfram K. E., Martin H. Schempp, and Jack Herrick: Elmira soaring contest, 1930.

Herrmann, H. Relative economy of different methods of airplane construction.

National Advisory Committee for Aeronautics, Technical Memorandums No. 618, April 30, 1931, Washington, April 1931, pp. 43, ills., diagrs.

69261—35-9

Hertel, Heinrich. Dynamische Bruchversuche mit Flugzeugbauteilen.

Zeitschr. Flugt. Motorluftsch. 22. Jahrg., 15,16. Heft (14, 28. Aug. 1930). München und Berlin, pp. 465-473, 489-502, ills., diagrs., tabls. Jahrbuch 1931 der Deutschen Versuchanstalt für Luftfahrt, E. V. München und Berlin, 1931, pp. 142-164, ills., diagrs., tabls.

- Steifigkeit, Festigkeit und Beanspruchung von Anschnallgurten und

Sesseln.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 111-124, ills., diagrs., tabls.

- Die Verdrehsteifigkeit und Verdrehfestigkeit von Flugzeugbauteilen

Jahrbuch 1931 der Duetschen Versuchsanstalt fur Luftfahrt, E. V., München und Berlin, 1931, pp. 165-220, ills., diagrs., tabls.

Heston. Heston an air port.

Flight, No. 1184, Vol. 23, No. 36 (Sept. 4,1931), London, p. 881.

- The race as seen at Heston.

Aeroplane, Vol. 41, No. 5 (July 29, 1931), London, pp. 280-291, ills.

Hetde, Gustav. Recording balloon theodolite.

Instrument World, Vol. 4, No. (June 1931), pp. 36-37, ills.

Heydemarck, Georg. Double-decker C. 666.

London, J. Hamilton, ltd., 1931, pp. viii, 207, ills., map. Translated by Claud W. Sykes.

Hildebrandt. Meteorologische Forschung für den Luftverkehr in Innerasien. Luftschau, 4. Jahrg., Nr. 17 (10. Sept. 1931), Berlin, pp. 57-58.

Hildebrandt, A. 25. Deutscher Luftfahrertag. Zur Tagung des Deutschen Luftfahrt-Verbandes an seinem Gründungsort.

Luftschau, 4. Jahrg., Nr. 13 (10. Juli 1931), Berlin, pp. 1-2.

Hill, George C. See Dryden, Hugh Latimer, and George C. Hill: Wind pressure on a model of a mill building.

Hinchman, H. S. See Cuthill, R. W., and H. S. Hinchman: History and commercial value of the airplane launching catapult.

Hindriks, Hajo. See Slot, T. E.: Ter nagedachtenis van H. Hindriks.

Hinkler, Bert. The return of Bert Hinkler.

Flight, No. 1198, Vol. 3, No. 50 (Dec. 11, 1931), London, pp. 1207-1209, ills.

Hinkler, H. J. L. See Great Britain: On the best British aviator.

Hinman, W. S., Jr. Automatic volume control for aircraft radio receivers.

United States Bureau of Standards, Journal of Research, Vol. 7, No. 1 (July 1931), Washington, pp. 37-46, ills., diagrs.

Hirschauer, Louis, et Charles Dollfus. L'année aéronautique 1930-1931. Paris, Dunod, Editeur, 1931, pp. 437, ills.

Hirschauer, Louis. N'y a-t-il pas trop de records du monde?

L'Aéronautique, 13me année, No. 151 (déc. 1931), Paris, pp. 439-440.

Hirth. 50-60 PS-Hirth-Vierzylinder-Flugmotor.

Deutsche Motor-Zeitung, Bd. 8, Nr. 6 (Juni 1931), pp. 207-210, ills.

- The Hirth light plane engine.

Flight, No. 1195, Vol. 23, No. 47 (Nov. 20, 1931), London, pp. 1149-1150, ills.

- Ein neue? Motor für Sportflugzeuge, der Hirth "H.M. 60."

Luftschau, 4. Jahrg., Nr. 16 ( 4. Aug. 1931), Berlin, p. 41, ill. Hirth, Wolf. Autofliegen.

Luftschau, 4. Jahrg., Nr. 11 (10. Juni 1931), Berlin, pp. 83-84.

Hirth, Wolfram K. E., Martin H. Schempp, and Jack Herrick. Elmira soaring contest, 1930.

National Advisory Committee for Aeronautics, Technical Memorandums No. 613, March 31, 1931, Washington, March 1931, pp. 13, tabls., maps.

Hispano-Suiza. Hispano-Suiza 1,000 Hp. 18 cylinder stock aircraft engine is designed after 1929 Schneider Cup race entry.

Automotive Ind., Vol. c5, No. 7 (Aug. 15,1931), New York, pp. 242-244, ills.

History. Ein Pionier des Luftverkehrs.

Luftschau, 4. Jahrg., Nr. 17 (10. Sept. 1931), Berlin, p. 62.

- See Althin, Torsten: Flygkönika; bilder och notitser ur luftfartens

historia.

- See Barker, Fowler W.: Air pioneers of the west.

- See Carter, Lane: When our wings began to sprout.

- See Carus-verlag, Berlin: Eine chronik des flug-gedankens bis zum luftverkehr im dienste der Völkerverbindung.

- See Davy, M. J. B.: Henson and Stringfellow, their work in aeronautics;

the history of a stage in the development of mechanical flight, 1840-1868.

- See Fairey, C. R.: Growth of aviation.

- See Gray, Mrs. Edith (Stearns): "Up"; a true story of aviation.

- See Gulf Refining Company: Aviation atlas.

- See H.H.: De eerste slachtoffers der luchtvaart.

- See Hegener, Henri: Uit de eerste jaren der militaire luchtvaart.

- See Magoun, Frederick Alexander, and Eric Hodgins: A history of aircraft.

- See Morazzoni, Giuseppe: Un pioniere dell'aeronautica Vincenzo Lunardi;

documenti inediti e saggio iconografico, raccolti da G. Morazzoni.

- See Mortane, Jacques: Leur dernier vol.

- See Mumey, Nolie: Evolution of flight; stories based on legendary and

historical data.

- See Newton, Byron S.: One of the greatest achievements in the story of

the human race.

- See Polesine, Jotti da Badia: II mo tore a vapore ed il suo impiego in

aeronautica.

- See Prepositi, Clemente: La Storia dell' aviazione. Vols. I, II, e III.

- See Robertson, F. A. de V.: A brief outline of the growth of British air

power from the balloon company of the Royal Engineers to the present day Royal Air Force.

- See Schneider trophy: The Schneider trophy contest.

- See Snowden Gamble, Charles Frederick: The air weapon, being some

account of the growth of British military aeronautics from the beginnings in the year 1783 until the end of the year 1929.

Hodges, Curtiss. This Washington man likes flying and tells why. u.S. Air Services, Vol. 16, No. 7 (July 1931), Washington, pp. 14-16.

HoDGiNS, Eric. See Magoun, Frederick Alexander, and Eric Hodgins: A history of aircraft.

Hodson, Dorotht. Keeping pilots in trim.

Western Flying, Vol. 9, No. 5 (May 1931), Los Angeles, Calif., pp. 50, 91, ill.

Hoeck, James. Braunschweig cradle of German aviation.

Aero Digest, vol. 18, No. 6 (June 1931), New York, pp. 50-51, 136, ills.

Hoeppner, Gerd von. Rückblick auf den Italienflug 1931. Luftschau, 4. Jahrg., Nr. 15 (10 .Aug. 1931), Berlin, pp. 28-30.

Hop, E. Les lois de la similitude et méthodes expérimentales en aérodynamique. Zpravy Vojenského Leteckého TJstavu Studijnîho v Praze, Vol. 5, No. 17,1931.

Hoff, Wilh. Jarhbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., Berlin-Adlershof. Herausgegeben von Wilh. Hoff; unter mitarbeit von Ottfried v. Dewitz, Paul Brenner, Heinrich Fassbender, Joachim v. Koppen, Oskar Kurtz, Otto Lacmann, Friedrich Seewald, Karl Thalau und Robert Thelen. Schriftleitung: Joachim Brämer.

München und Berlin, Druck von R. Oldenbourg, 1931, pp. xxv, 44*, 745, ills., diagrs., tabls.

Veröffentlichungen der DVL. Aerodynamische Abteilung 219. Einige Probleme aus dem Arbeitsgebiet der Aerodynamischen Abteilung, von F. Seewald, pp. 1-22. 208. Versuche an einem Windkanalmodell, von M. Schilhansl, pp. 23-35. 213. Modellversuche zur Ermittelung des Leistungsbedarfs für künstliche Belüftung von Motoren-Prüfständern, von M. Schilhansl, pp. 36-42. 202. Über den Landestoss von Seeflugzeugen, von W. Pabst, pp. 43-58. 245. Versuchsfahrten mit einem schnellfahrenden Schienenfahrzeug mit Luftschraubenantrieb, von F. Seewald und W. Feucht, pp. 59-63. 227. Die Kälteanlage der DVL, von G. Wolle, pp. 64-66.

Statische Abteilung. 217. Aufgaben der Luftfahrzeug-Statik, von K. Thalau, pp. 67-79. Zur Frage der Belastungsannahmen für Flugzeuge, von K. Thalau, pp. 80-82. 225. Beanspruchung von Flugzeugflügeln durch Böen, von H. G. Küssner, pp. 83-100. 229. Beitrag zur Frage der Belastungsannahmen für den Landungsstoss von Seeflugzeugen, von J. Taub, pp. 101-110. 223. Steifigkeit, Festigkeit und Beanspruchung von Anschallgurton und Sesseln, von H. Hertel, pp. 111-124. 220. Versuche mit Flugzeugbremsen, von V. Michael, pp. 125-141. 248. Dynamische Bruchversuche mit Flugzeugbauteilen, von H. Hertel, pp. 142-164. 218. Verdrehsteifigkeit von Flugzeugbauteilen, von H. Hertel, pp. 165-220. 232. Versuche mit langen Bolzen in Holzbauteilen, von A. Teichmann und K. Borkmann, pp. 221-229. 224. Räumliches Knicken einiger Stabverbindungen des Flugzeugbaues, von A. Teichman, pp. 230-232. 230. Schubknickversuche mit Wellblechtafeln, von. E. Seydel, pp. 233-245. 235. Die Berechnung regelmässiger, vielfach statisch unbestimmter Raumfachwerke mit Hilfe von Differenzen-Gleichungen, von H. Ebner, pp. 246-288. 226. Beitrag zur Berechnung viergurtiger Flechtwerke, von E. Seydel, pp. 289-304. Beitrag zum Gewichtsvergleich zwischen dreigurtigem und viergurtigem Flechtwerk, von E. Seydel, pp. 305-308.

Motorem Abteilung. 249. Über die mechanische Betriebsbeanspruchung des Vergaser-Flugmotors, von O. Kurtz, pp. 309-315. 239. Die Aussichten des Strahlantriebs für Flugzeuge unter besonderer Berücksichtigung des Abgas-Strahlantriebs, von H. Oestrich, pp. 316328. 252. Untersuchung eines Flugmotoren-Gebläses, Bauart Argus-Roots, von H. Oestrich, pp. 329-336. 253. Theoretische Untersuchung über die Möglichkeiten des Nachladeverfahrens, von H. Oestrich.pp. 337-342. 210. Untersuchungen über die Erregung von Drehschwingungen in Reihenmotoren, von R. Brandt, pp. 343-357. 204. Der DVL-Torsiograph, ein Dreh-schwingungs-Messgerät für Fahrzeugmotoren, von A. Stieglitz, pp. 358-361. 216. Erhöhung der Sicherheit von Luftfahrzeugen durch Bekämpfung der Brandgefahr, von F. Kühn, pp. 362-374. 251. Das Klopfen von Zündermotoren, von K. Schnauffer, pp. 375-378.

Stoff Abteilung. 234. Grundlagen für die konstruktive Anwendung und Ausführung von Stahlrohr-Schweissungen im Flugzeugbau, von A. Reichtlich, pp. 379-438. 250. Statische und dynamische Festigkeitseigenschaften einiger Leichtmetalle, von K. Matthaes, pp. 439-484. 233. Einfluss der Probestabform auf Zugfestigkeit und Bruchdehnung von dünnen Leicht* metallblechen, von K. Schraivogel, pp. 485-494. 197. Verfahren der Korrosionsprüfung, von E. K. O. Schmidt, pp. 495-504. 198. Ergebnisse von Korrosions- und Oberflächenschutz-versuchen mit Aluminium-Walzlegierungen, von P. Brenner, pp. 505-520. 199. Einfluss von Kochsalzlösungen verschiedener Konzentration auf den Verlauf des Korrosionsangriffs im Wechseltauchgerät, von E. K. O. Schmidt, pp. 521-524. 209. Seewasserbeständigkeit galvanischer Überzüge auf Eisen und Leichtmetalle, von E. K. O. Schmidt, pp. 525-531. 231. Korrosionsversuche an Verspannungs-Drahtlitzen mit verschiedenartigen Endverbindungen, von M. Abraham, pp. 532-536. 222. Quantitative Ermittelung der Witterungsbeständigkeit

von Anstrichen auf Holz, von E. K. O. Schmidt, pp. 537-541. 203. Der heutige Stand der Prüfung von Flugmotoren-Kraftstofen, von A. v. Philippovich, pp. 542-548. 240. Vergleichende motorische Untersuchung von Kraftstoffen, von A. v. Philippovich, pp. 549-566.

Abteilung für Luftbildwesen und Navigation. 243. Die Prüfung von Objektiven auf Verzeichnungsfehler, von W. Block, pp. 567-579. 228. Entzerrungsgerät für nicht ebenes Gelände, von O. Lacmann, pp. 580-582. 244. Die neue Startmesskammer System DVL-Zeiss, von O. Lacmann, pp. 583-587. 236. Verfahren zur raschen Berechnung der Deviationsbeiwerte aus in überschüssiger Anzahl gemachten Beobachtungen, von O. Lacmann, pp. 588-590. 205. Messgenauigkeit des Behmlotes für Flugzeuge bei geringen Flughöhen, von E. Schreiber, pp. 591-593. 237. HyperSensibilisierung optisch sensibilisierter Emulsionen und optische Sensibilisierung hypersensibilisierter Emulsionen, von U. Schmiescheck, pp. 594-599. 238. Versuche zur Steigerung der Haltbarkeit hypersensibilisierter Emulsionen, von U. Schmie-schek, pp. 600-604.

Abteilung für Elektrotechnick und Funkwesen. 206. Über die Zweckmässigkeit der Telegraphie und Telephone im Flugfunkverkehr mit Berücksichtigung neuer experimenteller Untersuchungen, von F. Eisner, pp. 605-614. 207. Vergrösserung der effektiven Höhe von Flugzeugschleppantennen, von F. Eisner, G. Sudeck, R. Schröer und O. Zinke, pp. 615-628. 212. Horizontale Strahlungskennlinien einer Kurzwellen-Richtantenne mit Reflektor, von R. K. Krüger und H. Plendl, pp. 629-632. 211. Erschütterungsstörungen bei ortbeweglichen Empfängern, von W. Brintzinger, P. v. Handel und H. Viehmann, pp. 633-644. 200. Untersuchungen über das Verhalten von quarzgesteuerten Sendern, von P. v. Handel, pp. 645-664. 246. Über den Einflus der 11 jährigen Sonnentätigkeitsperiode auf die Ausbreitung der elektrischen Wellen in der drahtlosen Telegraphie, von H. Plendl, pp. 665-671. 274. Beiträge zur Flugfunkeigenpeilung, von M. H. Gloeckner, pp. 672-678.

Flug Abteilung. 201. Anweisung für die Prüfung der Eigenschaften von Flugzeugen, von W. Hübner, pp. 679-683. 214. Ergebnisse von Messungen der Stabilität um die Querachse, von W. Hübner, pp. 684-690. 221. Flugmessungen über den Einfluss von Handley-Page-Schlitzquerrudern, von W. Pleines, pp. 691-708. 241. Messung desEinflusses des Schraubenstrahls auf den Ausschlag des Seitenruders im Geradeausflug, von O. Biechteler, pp. 709-711. 242. Einfluss der Flügelumrissform und der Querruder-Abmessungen auf die Quersteuerbarkeit von Eindeckern, von G. Mathias, pp. 712-726. 215. Messung der Sicht vom Führersitz verschiedener Flugzeugmuster, von G. Kurz, pp. 727-736.

Research work of the "DVL."

Journ. Roy. Aer. Soc, Vol. 35, No. 249 (Sept. 1931), London, pp. 771-818, ills., diagrs. London, Royal Aeronautical Society, 1931, pp. 48. Aeronautical Reprints 60.

Hoglund, G. O. See Hartman, F. V., and G. O. Hoglund: Forming of aluminum alloy sheet for aircraft.

Holland. See H., H.: Achter de schermen van de Holland-Indie lijn.

Holland, Harvey Hodges. Avigation.

New York and London, McGraw-Hill Book Company, inc., 1931, pp. vii, 272, ills., diagrs.

Hollyhock, W. S. Shock absorbers for aircraft landing gear.

Aircraft Engineer, Flight Engineering Section, Suppl. to No. 1165, Vol. 23, No. 17 (April 24, 1931), London, pp. 362c-362g (27-31), diagrs.

Holme, John C. Aviation clubs in the colleges.

Aviation, Vol. 30, No. 2 (Feb. 1931), New York, pp. 102-104, ills.

Holmes, Burton. And so we flew across the continent.

U.S. Air Services, Vol. 16, No. 7 (July 1931), Washington, pp. 13.

Holt, Fenton Vesey. Fenton Vesey Holt.

Aeroplane, Vol. 40, No. 17 (April 29,1931), London, pp. 753-754.

Holzapfel, Karl Maria, Käte und Rudolf Stocks. Frauen fliegen; sechzehn deutsche pilotinnen in ihren leistungen und abenteuern ... mit einem geleitwort von Herman Köhl.

Berlin, Deutsche Verlagsgesellschaft m.b.H. [1931], pp. 95, ills.

Homberger, E. Flugzeug mit Flettner-Rotor.

Die Umschau, 35. Jahrg., Heft 5 (31. Jan. 1931), Frankfurt a.M., p. 102.

Honduras. Ley de aviación.

Tegucigalpa, Tipografía Nacional, 1930, pp. 31.

Hooker, S. G. Compressibility effects in high speed air flow.

Journ. Roy. Aer. Soc, Vol. 35, No. 247 (July 1931), London, pp. 665-674, ills., diagrs.

Hoover, Herbert, Jr. Radio on the world's airlines.

Aero Digest, Vol. 18, No. 1 (Jan. 1931), New York, pp. 42-44, 148, ills.

Hoover, Mrs. Herbert. See Akron: The "U.S.S. Akron" is christened by Mrs. Hoover.

- See American Clipper: Mrs. Hoover christens the "American Clipper."

Hoover Dam. See Beadle, J. B.: Air survey for Hoover Dam.

Hope, W. Lawrence, and Norman W. Kennedy. A complete course for the commercial flying license.

London, J. Hamilton ltd., 1931, pp. xii, 347, ills., diagrs.

Hopf, Ludwig. Flugtechnik und Versuche im Fluge.

Wien, W., und F. Harms: Handbuch der Experimentalphysik, Bd. 4, 3. Teil. Hydroa und aerodynamik, Leipzig, Akademische Verlagsgesellschaft m.b.H., 1930, pp. 209-264, ills., diagrs.

- See Baranoff, A. v., and L. Hopf: Combined pitching and yawing motion

of airplanes.

Horiguchi, Sad ao. See Alloys: Über die Herstellung und die mechanischen Eigenschaften der Al-Cu-Si Legierungen.

Horizon. See K., A.: The aviator's artificial horizon.

Horn, Fritz. Schiffsschleppversuche.

Wien, W., und F. Harms: Handbuch der Experimentalphysik, Bd. 4, 3. Teil. Hydro- und aerodynamik, Leipzig, Akademische Verlagsgesellschaft m.b.H., 1930, pp. 1-112, ills., diagrs.

Horn, Hans A., und Karl Tewes. Die Schweissung von Elektronmetall im Flugzeugbau.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 22. Heft (28. Nov. 1931), München und Berlin, pp. 659-662, ills.

Horsepower. See Parker, A. E.: Horsepower at speed of sound.

Hosey, Gertrude. See Humphreys, Pauline Annette, and Gertrude Hosey: Romance of the airman.

Hotine, Martin. The Fourcade stereogoniometer.

London, H. M. Stationery Office, Printed by Harrison and Sons, ltd., 1931, pp. 159, ills., tabls.

Great Britain, Air Survey Committee, professional Papers No. 7.

- Surveying from air photographs.

London, Constable and Co., ltd., 1931, pp. xi, 250, ill.

Houghton, H. G. See Stratton, J. A., and H. G. Houghton: A theoretical investigation of the transmission of light through fog.

Houseman, M. R., and G. H. Keulegan. Investigation of damping liquids for aircraft instruments—II.

National Advisory Committee for Aeronautics, Report No. 398, Nov. 17, 193-1, Washington, U.S. Government Printing Office, 1931, pp. 19, ills., diagrs., tabls.

Howard, Clinton W. Development of military airplanes.

Aviation, Vol. 30, No. 1 (Jan. 1931), New York, pp. 34-36, ills.

Howell, A. J. Ears your own control.

Western Flying, Vol. 10, No. 6 (Dec. 1931), Los Angeles, Calif., pp. 34-35, ills.

Huber, Maksymiljan T. Nowoczesne wzory wytrzymaloáci zlozonej.

Instytut Badañ Technicznych Lotnictwa, Sprawozdanie kwartalne, Nr. 4, Warszawa, 1930, pp. 5-19, ills.

--W sprawie t.zw. wspóldzialania podluznic w skrzydlach jadnoplatów.

(Sur la "cooperation" des langerons dans les ailes des monoplans.)

Tnstytut Badan Technicznych Lotnictwa, Sprawozdanie. Bulletin No. G (Nr. 26), War* szawa, 1931, pp. 7-14, ill.

Huber, T. Obciazenie krytyczne pr§tów osiowo áciskanych o przekroju nie-ci^gle zmiennym.

Instytut Badañ Technicznych Lotnictwa, Sprawozdanie kwartalne, Nr. 3, Warszawa, 1930, pp. 14-25, ills.

-Zginanie belek prostych o przekrojach wiotkich.

Instytut Badañ Technicznych Lotnictwa, Sprawozdanie kwartalne, Nr. 3, Warszawa, 1930, pp. 5-13, ills.

Hubs. See Engines: A spring hub for aero-engines. A flexible airscrew drive damping out torque variation which also forms a transmission dynamometer.

Hüber, Walter. Anweisung für die Prüfung der Eigenschaften von Flugzeugen.

Jahrbuch 1931 der Deutschen Versuchsantsalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 679-683.

Hübner, Walter. Der Deutschlandflug 1931.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 23. Heft (14. Dez. 1931), München und Berlin, pp. 685-693, diagrs., tabls.

- Ergebnisse von Messungen der Stabilität um die Querachse.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 684-690, diagrs.

- Dr.-Ing. Alfred King starb am 29. Januar 1931 den FJiegertod.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 6. Heft (28. März 1931), München und Berlin, p. 157, port.

Hünefeld, E. G. Freiherr v. See Schäffer, Ernst: Glück ab; bahnbrecher der lüfte.

- See Walter, Friedrich: Hünefeld, "Ein Leben der Tat."

Hughes, J. Scott. Ordeal by air.

London, Longmans, Green & Co., Ltd.

Hulls. See Gerard, I. J.: A method of testing the strength of aircraft hulls.

Hult, I. Flygplankryssaren "Gotland."

Flygning, Arg. 9, N:R 9 (Sept. 1931), Stockholm, pp. 183-185, ill.

Humidity. See Bird, W. G.: The influence of atmospheric humidity and other factors upon the static lift of airships.

Humphery, G. E. Woods. Air communications in Africa.

Journal of the Royal Society of Arts, Vol. 79, No. 4081 (Feb. 6, 1931), London, pp. 271-299, ills., diagrs., maps.

Humphreys, Pauline Annette, and Gertrude Hosey. Romance of the airman.

Boston, Ginn and Company, 1931, pp. xviii, 566, ills.

Huntington, Dwight. Adequate visibility for planes.

Aero Digest, Vol. 18, No. 6 (June 1931), New York, pp. 52-53, ills.

Huntington, Dwight. Light plane cost problems.

Aero Digest, Vol. 18, No. 3 (March 1931), New York, pp. 54-55, 144-148, ills.

■—— Safety for the light airplane.

Aero Digest, Vol. 19, No. 2 (Aug. 1931), New York, pp. 46-48,119, ills.

- Welcome the mosquito fleet.

Aero Digest, Vol. 18, No. 2 (Feb. 1931), New York, pp. 56-57, 126, ills.

Hurttig, Benno. Bericht über die Flugeigenschaften der "Kassel 25." Luftschau, 4. Jahrg., Nr. 14 (24. Juli 1931), Berlin, p. 20.

Husun. The "Husun" track computer.

Flight, No. 1163, Vol. 23, No. 15 (April 10,1931), London, pp. 321-322, ills.

Hutton, C. T. See Ower, E., and C. T. Hutton: The drag of small streamline bodies.

- See Ower, E., and C. T. Hutton: Interference of a streamline nacelle on a

monoplane wing.

■- See Ower, E., and C. T. Hutton: Investigation of the boundary layers

and the drags of two streamline bodies.

Hydraulics. See Rothrock, A. M.: Hydraulics of fuel injection pumps for compression-ignition engines.

- See Szymanski, Piotr: Ecoulement plan du fluide à travers une palissade

de segments rectilignes.

Hydrodynamics. Hydrodynamics and aerodynamics.

Mech. Eng., Vol. 53, No. 12 (Dec. 1931), New York, p. 891.

- See Alayrac, Antoine Charles: Étude des écoulements irrotationnels dans

l'espace à trois dimensions.

- See Bénard, Henri: Nouvelles installations pour l'étude des sillages à

l'Institut de Méchanique des Fluides.

- See Camichel, C, et P. Dupin: Hydrodynamique. Sur les divers modes

de construction des filets a l'entrée d'un ajutage.

- See Crausse, E., et J. Baubiac: Sur l'application d'une méthode d'enregistrement à l'étude des tourbillons se produisant dans les liquides.

- See Crausse, E., et J. Baubiac: Sur les tourbillons secondaires se produisant

à l'aval d'un obstacle immergé dans un liquide.

- See Dupin, P., et Trissé-Soldier: Hydrodynamique.—Sur les tourbillons

alternés de Benard-Karman et la loi de similitude dynamique de Reynolds.

- See Eck, Bruno: Strömungslehre an hand von Strömungsbildern; darstellung der wichtigsten Strömungsvorgänge aus der flugtechnik und dem maschinenbau mit 60 Strömungsaufnahmen.

- See Epstein, Paul S.: Air resistance of high velocity projectiles.

- See Falkenhagen, H.: Klassische Hydrodynamik.

- See Gay, Albert Pierre: Recherches sur l'hydrodynamique des liquides

visqueux.

-- See Girault, Maurice: Méthode géométrique de tracés de profils d'ailes

et de corps fuselés. Essai sur la viscosité en mécanique des fluides.

Hydrodynamics. See Kunz, Jakob: Some examples of dimensional analysis.

- See Lamb, H.: Lehrbuch der Hydrodynamik.

- See Leray, J.: Hydrodynamique.—Mouvement lent d'un fluide visqueux

à deux dimensions limité par des parois fixes.

- See Poncin, Henri: Hydrodynamique.—Sur le mouvement d'un fluide

autour d'une cavitation.

- See Rosenblatt, Alfred: Hydrodynamique.—Sur le stabilité des mouvements laminaires des liquide visqueux incompressibles.

- See Schröder, Paul: Ein Übertragungsgesetz der Hydrodynamik und

seine Anwendung bei der Untersuchung des Startes von Seeflugzeugen.

- See Tietjens, 0.: Hydro- und aeromechanik nach Vorlesungen von L.

Prandtl. Band 2: Bewegung reisbender Flüssigkeiten und technische Anwendungen.

- See Tremblot, R.: Hydrodynamique expérimentale.—Sur l'application des

interférences à quelques problèmes d'écoulement à grande vitesse.

- See Wagner, Herbert: Über die Landung von Seeflugzeugen.

Hydroplanes. See Pèpe, Paul: Précis d'hydra viation; cours de l'École Technique d'Aéronautique et de Construcion Automobile.

Hylander, Clarence John. Cruisers of the air; the story of lighter-than-air craft, from the days of Roger Bacon to the making of the ZRS-4. New York, The Macmillan Company, 1931, pp. xxiv, 308, ills, diagrs.

I

I.A.R. The "I.A.R." pursuit airplane (Roumanian). A one-place cantilever low-wing monoplane.

National Advisory Committee for Aeronautics, Aircraft Circulars No. 144, May 15, 1931, Washington, May 1931, pp. 3, ills.

I.L.L.S. See Stockholm.

IVA:s. IVA:s flygtekniska kommitté.

Flygning, Ârg. 9, N:R 7 (Juli 1931), Stockholm, p. 130.

Ice. Tegen ijsaanzetting.

Het Vliegveld, 15de Jaarg., No. 6 (Juni 1931), Amsterdam, p. 196, ills.

- See Goldbach, Georg: Vereisungsgefahr bei Flugzeugen.

- See National Advisory Committee for Aeronautics: Recherches américaines sur la formation de la glace à bord des avions en vol.

- See No ville, George O.: Ice on the wings.

- See Schaefer, 0. W.: Is bildning pâ flygplan.

- See Theodorsen, Theodore, and William C. Clay: Ice prevention on aircraft by means of engine exhaust heat and a technical study of heat transmission from a Clark Y airfoil.

Iceland. The service cruise to Iceland.

Aeroplane, Vol. 40, No. 5 (Feb. 4,1931), London, pp. 196,198, ills.

Idaho. Idaho aeronautics law, air navigation facilities, air marking, licensing and regulation, miscellaneous information. Aeronautics bulletins No. 1 and 2, revised to June 1, 1931.

Payetto, Independent Printing Co., 1931, pp. 68, diagrs., map., forms. Aeronautics Bulletin No. 4.

Ide, John Jay. The French Air Ministry.

Airway Age, Vol. 12, Nos. 2, 3 (Feb., Mar. 1931), New York, pp. 149-151, 238-241, ills.

- The Loth system of navigation by rotating radio beacons.

U.S. Air Services, Vol. 16, No. 3 (March 1931), Washington, pp. 29-30, ills.

Idrac, P. Études expérimentales sur le vol à voile au lieu même d'évolution des grandes oiseaux voiliers (vautours, albatros, etc.); son application au vol à voile humain.

Paris, F. Louis Vivien, 1931, pp. 75, ills., diagrs.

Ignition. See Darnell, T. H.: The automotive ignition coil.

- See Fenning, R. W., and F. T. Cotton: Experiments on the ignition of

gases by sudden compression.

Illinois. Air traffic rules of the State of Illinois prescribed by the Illinois Aeronautics Commission and effective November 23, 1931. Springfield, Journal Printing Company, 1931, pp. 9.

Imperial Airways. The air fleet of Imperial Airways, ltd.

Flight, No. 1188,1189, Vol. 23, No. 40, 41 (Oct. 2, 9,1931)-, London, pp. 983-986,1023-1025, ills.

India. Civil aviation in India.

Aeroplane, Vol. 41, No. 19 (Nov. 4,1931), London, p. 1082.

- De luchtpostdienst met Indie.

Het Vliegveld, 15de Jaarg., No. 1 (Jan. 1931), Amsterdam, p. 4, ill.

—— On India and aviation.

Aeroplane, Vol. 41, No. 10 (Sept, 2, 1931), London, pp. 557-564, ills.

- De postvluchten op Indie.

Het Vliegveld, 15de Jaarg., No. 2, 3 (Feb., Maart 1931), Amsterdam, pp. 42, 82-84, ills., map.

- Wat schort er aan den Holland-Indië luchtpostdienst?

Het Vliegveld, 15de Jaarg., No. 1 (Jan. 1931), Amsterdam, pp. 13-16.

- See Great Britain: Convention between His Majesty, in respect of the

United Kingdom and of India, and the King of Italy respecting air transport services. Rome, May 16, 1931.

- See Harper, Harry: By air from England to India.

- See Hegener, Henri: Een Zeppelin-dienst op Indie.

- See Köhler, Roosje: Dagboek van een Indië-Holland vlucht.

- See Langley, M.: The Royal Dutch Indian airways.

- See Sacré, H. Walaardt: Een luchtschipdienst Nederland-Indië.

Indianapolis. See Haynes, H. Gene: Indianapolis municipal airport.

Indicator Systems. See Fisher, Gerhard R.: The way home.

Industry. See Rentschler, Frederick B.: Glancing back at 1930. The aircraft industry.

Inertia. See Miller, Marvel P., and Hartley A. Soulé: Moments of inertia of several airplanes.

Inglis, C. E. See R. 101: Cause of the loss of R. 101. Conclusions of the Court and a summary of investigations made at the National Physical Laboratory. Experiments and calculations carried out at the National Physical Laboratory (Prepared by Professor C. E. Inglis).

Insect Flight. Come volano gli insetti.

Riv. Aer., Anno 7, N. 11 (nov. 1931), Roma, pp. 382-389, ills. Insects. See Gunn, Donald L.: The function of the air sacs of insects. Insignia. See Birnn, Roland: Army Air Corps insignia.

Institut de Mechanique des Fluides. See Bénard, Henri: Nouvelles installations pour l'étude des sillages à l'Institut de Méchanique des Fluides.

Instrument Board. See Cockpit equipment: The brain centre of a modern aircraft. Cockpit equipment of the "Balair" Fokkers.

Instrument Flying. On "instrument flying."

Flight, No. 1180, Vol. 23, No. 32 (Aug. 7, 1931), London, pp. 779-7s1, ills.

- See Underhill, E. A.: Pilots under the hood.

Instruments. Present status of aircraft instruments. Report prepared by the subcommittee on instruments.

National Advisory Committee for Aeronautics, Report No. 371, Jan. 31, 1931, Washington, U.s. Government Printing Office, 1930, [1931j, pp. 26.

- See American Society of Mechanical Engineers: Airplane instrument

vibration.

- See Askania: Le compte-tours Askania à transmission pneumatique à

distance.

- See Braun: The Braun relative altitude meter.

- See Dearborn, C. H., and H. W. Kirschbaum: Maneuverability investigation of the F6C-3 airplane with special flight instruments.

- See du Cluzel: Il calcolatore "du Cluzel."

- See Goerz-Clementi: Indicatore di rotta Goerz-Clementi.

- See Hinman, W. S., Jr.: Automatic volume control for aircraft.

- See Houseman, M. R., and G. H. Keulegan: Investigation of damping

liquids for aircraft instruments—II.

- See Husun: The "Husun" track computer.

- See Jones, D. A.: The R. A. E. automatic observer Mark IA.

- See Lacmann, Otto: Entzerrungsgerat für nicht ebenes Gelände.

- See Lacmann, Otto: Die neue Startmesskammer System DVL-Zeiss.

- See Olshevsky, Dimitry: A machine for automatic generation of airfoils.

- See Ower, E.: A micromanometer of high sensitivity.

-- See Peters, H.: Druckmessung.

Instruments. See Ramsey, Logan C: Aircraft instruments as a safety factor.

- See Ramsey, Logan C: The pilot and his air speed meter.

- See Ramsey, Logan C: The pilot and his altimeter.

- See Reid-Sigrist: The Reid-Sigrist turn indicator.

- See Schreiber, Ernst: Messgenauigkeit des Behmlotes für Flugzeuge in

geringen Flughöhen.

- See Sherlock, R. H., and M. B. Stout: An anemometer for a study of wind

gusts.

- See Speed Indicators: Record engine speed indicators.

- See Stark, Howard Cyrus: Blind or instrument flying? Instruction book.

- See Stieglitz, Albert: Der DVL-Torsiograph, ein drehschwingungsMessgerät für Fahrzeugmotoren.

- See Tate, George, jr.: Servicing aircraft instruments.

- See Turn indicator: A new turn indicator.

- See Webb, L. D.: Know your way around.

- See Wines, James P.: Instrument maintenance.

Insurance. Group insurance at Blackburn's.

Flight, No. 1162, Vol. 23, No. 14 (April 3, 1931), London, pp. 298-299.

- Insurance for pilots.

Western Flying, Vol. 10, No. 5 (Nov. 1931), Los Angeles, Calif., pp. 29-30.

- Life insurance coverage for those who fly.

U.S. Air Services, Vol. 16, No. 11 (Nov. 1931), Washington, D.C., pp. 38-39.

- The new power in aviation insurance.

The Aeroplane, Vol. 41, No. 1 (July 1, 1931), London, pp. 14-16.

- See Axe, Leonard H.: Aviation insurance.

- See Blum, René: Les assurances aériennes.

- See Crowdus, Walter C: Aviation insurance.

- See Franchelli, G.: La situation des assurances "aviation".

- See Guinotte, Jules: Aviation insurance.

- See K. A.: Will flying invalidate a life insurance policy.

- See Kremlick, Kurt J.: A survey of aviation insurance law.

- See Prochasson, Roger: Le risque de l'air.

- See Stimson, Thomas E., Jr.: One third down. The chief obstacle to

financing airplane sales is insurance. This and other problems are discussed in this article.

- See Wines, James P.: Reducing fire insurance costs.

Interceptors. See Alston, R. P.: Stalled flight tests on'a Bristol fighter fitted with quto control slots and interceptors.

Interference. A designer's notes on interference.

Aviation, Vol. 30, No. 2 (Feb. 1931), New York, pp. 111-112, ills.

- See Ower, E., and C. T. Hutton: Interference of a streamline nacelle on

a monoplane wing.

International Aeronautical Conference. The 32nd International Aeronautical Conference.

Flight, No. 1160, Vol. 23, No. 12 (March 20, 1931), London, p. 259.

International American Conference. Commercial aviation. Convention between the United States of America and other American republics. Signed at Habana, February 20, 1928.

Washington, U.S. Government Printing Office, 1931, pp. 11.

U.S. Treaties. Treaty Series No. 840.

Ratification advised by the Senate of the United States, February 20, 1930 (legislative day February 17, 1931). Ratified by the President of the United States, March 6,1931.

Ratification of the United States of America deposited with the government of Cuba, July 17, 1931. Proclaimed by the President of the United States, July 17, 1931.

International aviation. See Colegrove, Kenneth: A survey of international aviation.

International Caterpillar Club. See Dixon, Charles: Tales of the International Caterpillar Club.

International Commission for Air Navigation. What the I. C. A. N. is. Paris, Imprimerie Blondel La Rougery, 1931, pp. 14.

International Congress for Applied Mechanic^. Verhandlungen des 3. Internationalen Kongresses für technische Mechanik. Proceedings of the 3rd International Congress for Applied Mechanics. Comptes rendus du 3ème Congrès International de Mécanique Appliquée. Stockholm 24-29 August 1930. Im auftrag des Organisationskomitees hrsg. von C. W. Oseen, Waloddi Weibull.

Stockholm, Ab. Sveriges Litografiska Tryckerier, [1931], 3 vols., ills., diagrs.

I.—Hydro- and aerodynamics.

International Congress of Aerial Navigation. See Congrès International de la Navigation Aérienne: Cinquième Congrès International de la Navigation Aérienne, organisé sous les auspices du gouvernment Néerlandais par l'Aéro-Club Royal des Pays-Bas, La Haye, 1-6 septembre 1930.

International Nickel Company. A directory of American aircraft engines. New York, The International Nickel Company, 1931, pp. 69, ills.

Internationalen Gessellschaft zur Erforschung der Arktis mit Luftfahrzeugen. See Kohl-Larson, Ludwig: Die arktisfahrt sea "Graf Zeppelin", im auftrage der Internationalen Gesellschaft zur Erforschung der Arktis mit Luftfahrzeugen (Aeroarctic).

Internationales Flug-Handbuch. Internationales Flug-Handbuch. Paris, Imprimerie Crete A.A., 1931, pp. 100, ills.

Inter-parliamentary Union. What would be the character of a new war? Enquiry organised by the Interparliamentary Union. London, P. S. King & Son., ltd., 1931, pp. xviii, 411. Aerial weapons and future wars, by K. A. Bratt and J. F. C. Fuller.

Interplanetary voyages. See Biermann, Gerd.: Weltraumschiffahrt? Eine kurze studie des problems.

- See Lasser, David: The conquest of space.

Interplanetary voyages. See Ley, Willy: Die fahrt ins weltall.

Ireland. Verordnung. Irische Luftfahrtverordnung vom 6. März 1930.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 10-11 (14. März 1931), Berlin, pp. 62-67.

- See Allied and associated powers: Protocol amending articles 34 and 40

of the Convention for the Regulation of Aerial Navigation of October 13, 1919. Paris, December 11, 1929. Irish ratification on April 9, 1930.

Irish Free State. See MacSweeney, P. F.: Civil aviation in the Irish Free State.

Irvin. The Irvin air chute.

Flight, No. 1158, Vol. 23, No. 10 (March 6, 1931), London, pp. 211-213, ills.

- Some Irvin airchute statistics.

Flight, No. 1156, Vol. 23, No. 8 (Feb. 20,1931), London, p. 167.

Irving, H. B., A. S. Batson, and A. L. Maidens. Rolling and sideslip experiments on a model slotted biplane of R.A.F. 31 section.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 910-914, diagrs. Rep. Mem. No. 1240. (Ae. 395.)

Irving, H. B., and A. S. Batson. Some early model experiments on devices for improving lateral control near the stall.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 819-823, diagrs. Rep. Mem. No. 1251.

- Spinning of a model of the Fairey Ulf seaplane.

Aer. Res. Comm., Rep. Mem., No. 1356, (Ae. 487—T. 2969), June 1930, London, 1931, pp. 15, ill., diagrs., tabls.

Irving, H. B. See Batson, A. S., H. B. Irving, and S. B. Gates: Spinning experiments on a single seater fighter. Part I.—Further model experiments, by A. S. Batson and H. B. Irving; Part II.—Full scale spinning tests, by S. B. Gates.

Irving Air Chute Co., Inc., and Floyd Smith Aerial Equipment Co. Claims of patents for parachute are adjudged valid and infringed.

United States Daily, Vol. 5, No. 296 (Feb. 18, 1931), Washington, D.C., pp. 8, 10.

Irwin, R. Randall. How fares the light plane?

Western Flying, Vol. 10, No. 1 (July 1931), Los Angeles, Cai., pp. 33-34.

- The light plane. How the nation's skies will look if the builders of light

planes have their wish.

Western Flying, Vol. 9, No. 4 (April 1931), Los Angeles, Cai., pp. 26-29, ill.

- The problem of distribution.

Western Flying, Vol. 10, No. 3 (Sept. 1931), Los Angeles, Cai., pp. 12-14.

Italia. See Nobile, Umberto: With the "Italia" to the North Pole.

Italiaander, Rolf, So lernte ich Segelfliegen.

Zürich, Leipzig, Orell Füssli Verlag, 1931, pp. 167, ills. Was Jungens Erzählen, Bd. 12.

Italy. Annuario 1930. Ministerio dell'Aeronautica. Aviazione civile e traffico aereo.

Roma, Istituto Poligrafico dello Stato Libreria, pp. 278, tabls.

- Annuario 1931. Ministero dell'Aeronautica. Direzione generale dei

servici del materiale e degli aeroporti. Ufficio presagi.

Roma, Istituto Poligrafico dello Stato, Libreria, pp. 303, maps., tabls.

Italy. Avizaione coloniale.

Riv. Aer.. Anno 7, N. 10 (ott. 1931), Roma, pp. 44-105, ills., maps.

- Carta aeronautica d'Italia, 1:250000, herausgegeben vom Italienischen

Aero-Club (R. Aero-Club d'Italia).

Freiburg i. Br., Reise- und Verkehrsverlag, 1930.

- The circuit of Italy.

Flight, No. 1179, 1181, Vol. 23, No. 31, 33 (July 31, Aug. 14, 1931), London, pp. 758, 816-820, ills., map.

- Colle ali d'Italia alla riconquista del Fezzan.

Riv. Aer., Voi. 7, N. 1 (gen. 1931), Roma, pp. 68-119, ills., map.

- De eskader-oceaanvlucht der Italianen.

Het Vliegveld, 15de Jaarg., No. 2 (Feb. 1931), Amsterdam, pp. 57-59, ills.

- Les grandes manœuvres de l'aviation Italienne.

L'Aérophile, 39e, année, No. 10 (15 oct. 1931), Paris, p. 307.

- An Italian helicopter.

Scient. Amer., Vol. 144, No. 2 (Feb. 1931), New York, p. 124, ill.

- The Italian high-speed flight.

Aeroplane, Vol. 40, No 7 (Feb. 18, 1931), London, p. 272.

- Italian squadron's Atlantic cruise.

Flight, No. 1151, Vol. 23, No. 3 (Jan. 16, 1931), London, pp. 50-51, ills.

- Norme per l'iscrizione nell'albo dei fornitori della R. Aeronautica (Estratto

dal Giornale Ufficiale della R. Aeronautica, Dispensa Ila-Circolare n. 152).

Roma, Istituto Poligrafico dello Stato, Libreria, 1930, pp. 6. Ministero dell'Aeronautica. Ispettorato di Commissariato Militare.

- Onze hydravions italiens traversent l'Atlantique Sud.

L'Aéronautique, 13me année, No. 140 (jan. 1931), Paris, pp. 5-6, ill.

- I principali tipi isobarici interessanti l'Italia.

Ministero dell'Aeronautica, Direzione Generale dei Servizi del Materiale e degli Aeroporti, Ufficio presagi, Roma, Tip. Vichi & Sparaciari, 1931 A. IX, pp. 11, maps.

- Il Reale Aero Club d'Italia.

Riv. Aer., Anno 7, N. 11 (nov. 1931), Roma, pp. 407-417.

- Registro italiano navale ed aeronautico (R.I.N. ed A.) per la visita e la

classificazione delle navi mercantili, dei galleggianti e degli aeromobili commerciali: Libro-registro 1929.

Genova, Libro-registro (tipo-litogr. P. Pellas), 1929, pp. 1300.

- Registro italiano navale ed aeronautico per la visita e la classificazione

delle navi mercantili, dei galleggianti e degli aeromobili commerciali. Libro-registro 1931.

Genova, stab, del Registro italiano navale ed aeronautico (arti graf. Pellas), 1931, pp. cxoij, 1212.

- Rome to Rio in formation.

U.S. Air Services, Voi. 16, No. 2 (Feb. 1931), Washington, pp. 35-36, 38, ills.

- Testo unico delle leggi e regolamento sulla requisizione dei quadrupedi e

veicoli per il r. esercito, per la r. marina e per la r. aeronautica. Seconda edizione aggiornata a tutto il 21 marzo 1929. (Ministero della guerra; comando del Corpo di stato maggiore).

Roma, Istituto poligr. Stato, Libreria edit, tip., 1931, pp. 106.

See Bouché, Henri: Une entreprise aéronautique sans précédent.

Italy. See Brazil: The Regia Aeronautica in Brazil.

- See Cogliolo, Pietro: Codice aeronautico, con appendici di aggiornamento

a tutto il 1930.

- See Florman, B.: Den stora Italienske eskaderflygningen.

- See Great Britain: Convention between His Majesty, in respect of the

United Kingdom and of India, and the King of Italy respecting air transport services. Rome, May 16, 1931.

- See Great Britain: Exchange of notes between His Majesty's governments in the United Kingdom, Canada, the Commonwealth of Australia, New Zealand, and the Union of South Africa and the Government of India, and the Italian government respecting documents of identity for aircraft personnel. London, April 13, 1931.

- See Llave, Joaquin de la: Traversia del oceano por una escuadro de hidros

italianos.

- See Martelloni, Giovanni F.: Orazione non detta per il volo atlantico

dell'aquile di Roma.

- See Regia Aeronautica: The triumph of the Regia Aeronautica.

- See Rysky, Carlo de: La croissiere italienne dans l'Atlantique-Sud.

- See Sbernadori, Paolo: Commercial aviation in Italy.

- See Schneider trophy: The Schneider contest.

- See Silvestri, Armando: L'ultimo dirigible italiano.

- See Thornhill, Gertrude: Italy to Brazil 6,450-mile formation flight.

- See United States: Air navigation. Arrangement between the United

States of America and Italy. Effective by exchange of notes signed October 13 and 14, 1931. Effective October 31, 1931.

- See United States Department of State: Air navigation. Arrangement

between the United States of America and Italy. Effected by exchange of notes signed October 13 and 14, 1931. Effective October 31, 1931.

Italy. Ministero dell'Aeronautic a. See Zanetti, M., and C. Avarello: Manuale del fotografo d'aeronautica.

J

Jackson, George Gibbard. The book of the air.

London and Glasgow, Collins' Cleartype Press, 1931, pp. 288, ills.

Jacobs, A. M. Photometric tunnel at Wright Field.

Aero Digest, Vol. 19, No. 4 (Oct. 1931), New York, p. 94.

Jacobs, Eastman Nixon. The aerodynamic characteristics of eight very thick airfoils from tests in the variable density wind tunnel.

National Advisory Committee for Aeronautics, Report No. 391, July 30,1931, Washington, U.S. Government Printing Office, 1931, pp. 14, ills., diagrs., tabls.

Jacobs, Eastman Nixon, and Robert M. Pinkerton. Tests of N.A.C.A. airfoils in the variable-density wind tunnel. Series 43 and 63.

National Advisory Committee for Aeronautics, Technical Notes No. 391, Sept. 15, 1931, Washington, September 1931, pp. 32, diagrs., tabls.

Jacobs, Eastman Nixon, and Robert M. Pinkerton. Tests of N.A.C.A. airfoils in the variable-density wind tunnel. Series 44 and 64.

National Advisory Committee for Aeronautics, Technical Notes No. 401, Dec. 1,1931, Washington, December 1931, pp. 31, diagrs., tabls.

- Tests of N.A.C.A. airfoils in the variable-density wind tunnel. Series 45

and 65.

National Advisory Committee for Aeronautics, Technical Notes No. 392, Sept. 22, 1931, Washington, September 1931, pp. 30, diagrs., tabls.

Jacobs, Eastman Nixon. Tests of six symmetrical airfoils in the variable density wind tunnel.

National Advisory Committee for Aeronautics, Technical Notes No. 385, July 31, 1931, Washington, July 1931, pp. 18, ill., diagrs., tabl.

Jacunski, Juljan. Przyrz^d do cechowania dysz ganzikow.

Instytut Badan Technicznych Lotnictwa, Sprawozdanie kwartalne Nr. 2, Warszawa, 1930, pp. 35-36, ill.

- Stroborama.

Instytut Badan Technicznych Lotnictwa, Sprawozdanie, Bulletin No. 6, Warszawa, 1931, pp. 117-119, ills.

Jaeschke, Rudolf. Ein Beitrag zur Losing des Problems der Verkürzung von Start and Landung bei Flugzeugen.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 8. Heft (28, April 1931), München und Berlin, pp. 221-228, ills., diagrs.

Jaffeux-Tissot, M. Après les records de durée et de distance.

L'Aérophile, 39e année, No. 4 (15 avril 1931), Paris, pp. 99-100, ill.

Jahrbuch für Luftfahrt. Ergebnisse aus forschung, technik und betrieb herausgegeben von Werner v. Langsdorf!. München, J. F. Lehmanns, 1931, 1932, 3 vols.

Jalbert. See Bradley, W. F.: Jalbert heavy oil engine using carburetor and premixing cylinder under construction for the French air service.

James, Thurstan. How to see the contest.

Aeroplane, Vol. 41, No. 11 (Sept. 9,1931), London, pp. 622-624, ill., map. Schneider trophy.

--A spectator afloat.

Aeroplane, Vol. 41, No. 12 (Sept. 16, 1931), London, pp. 718-724, ills.

Janik, Franciszek. Obliczanie podwozia samolotu metoda sil jednostkowych. (Calcul du train d'atterrissage d'un avion par la méthode de forces unitaires). Instytut Badan Technicznych Lotnictwa, Sprawozdanie, Bulletin No. 7, Nr. 36, Warszawa, 1931, pp. 25-42, ills.

- Opis przyrz^dow rylcowych.

Instytut Badan Technicznych Lothictwa, Sprawozdanie, Bulletin No. 6, Warszawa, 1931, pp. 120-124, ills.

Japan. A Japanese light aircraft.

Flight, No. 1179, Vol. 23, No. 31 (July 31,1931), London, p. 757, ill.

- The Japanese research institute. The recently opened aeronautical laboratory of Tokyo Imperial University.

Aircraft Engineering, Vol. 3, No. 32 (Oct. 1931), London, pp. 241-243, ills.

--Japanese wind tunnels.

Engineering, Vol. 131, No. 3411 (May 29, 1931), London, pp. 689-690, ills.

- Verkehrsvorschriften.

Nachrichten für luftfahrer, 12. Jahrg., Nr. 52 (26. Dez. 1931), Berlin, pp. 374-375. 69261—35-10

Japan. Wind tunnels in Japan. Leading particulars and scale drawings of six tunnels used in aerodynamic investigations.

Aircraft Engineering, Vol. 3, No. 26 (April 1931), London, p. 79, ills.

Jenkin, C. F., and G. D. Lehman. High frequency fatigue.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 922-956, ills., diagrs., tabls. Rep. Mem. No. 1222. (M. 62.)

Jenkin, J. W. See Archbutt, S. L., and J. W. Jenkin: Mechanical properties of pure magnesium and certain magnesium alloys in the wrought condition— (continued).

- See Tapsell, H. J., S. L. Archbutt, and J. W. Jenkin: Alloys sub-committee.

Aeronautical Research Committee. Mechanical properties of pure magnesium and certain magnesium alloys in the wrought condition (continued). Mechanical properties of an "Electron" alloy.

Jenkins, H. F. Blind flying and some conclusions.

Aeroplane, Vol. 41, No. 8 (Aug. 19,1931), London, p. 476.

Jennings, W. G. "Cornering" at high speeds.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, 1931, pp. 343-351, diagrs. Reports and Memoranda No. 1381 (Ae. 427.)

- Directional stability of high speed aircraft.

Aer. Res. Comm., Rep. Mem., No. 1340, (Ae. 472), May 1930, London, 1931, pp. 4, diagrs., tabl.

- The effect of span on aircraft performance.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 504-520, diagrs., tabls. Rep. Mem. No. 1276. (Ae. 422.)

- Experiments in lateral control. An account of tests with autoslots and

interceptor and spoiling devices on the same aircraft.

Aircraft Engineering, Vol. 3, No. 32 (Oct. 1931), London, pp. 253-254, ills.

- Full scale experiments of high tip speed airscrews. Comparative performance trials of three airscrews of different sections.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 401-406, diagrs., tabl. Rep. Mem. No. 1282 (Ae. 428.)

Jennings, W. G., and A. Ormerod. Full scale experiments on high tip speed airscrews. The effect of thickness of section on airscrew performance.

Aer. Res. Comm., Rep. Mem., No. 1339, (Ae. 471), August 1930, London, 1931, pp. 6, ills., diagrs., tabls.

Jennings, W. G. Tests of various lateral controls fitted to a Siskin aircraft.

Aer. Res. Comm., Rep. Mem., No. 1384 (Ae. 509-T. 3077), December 1930, London, 1931, pp. 10, ills., diagrs.

- Variation of power with height. Power factor in relation to international

standard atmosphere, with a method of reduction.

Aircraft Engineering, Vol. 3, No. 25 (March 1931), London, pp. 55-56, diagrs.

- See Clark, K. W., and W. G. Jennings: Full scale determination of the

motion of an Avro aeroplane when stalled.

Jet control. See Townend, H. C. H.: A study of slots, rings and jet control of the boundary layer.

Jet propulsion. See Richardson, Edward Gick: Jet propulsion for aircraft.

- See Richardson, Edward Gick: Re jet propulsion.

See Whittle, J.: Re jet propulsion.

Joaquín de la Llaye. See Autogiro: El viaje más largo hecho en autogiro.

Johansen, F. C. Flow through pipe orifices at low Reynolds numbers.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 224-247, ills., diagrs., tabls. Rep. Mem. No. 1252 (Ae. 402.)

- See Lock, C. N. H., and F. C. Johansen: Pressure plotting a streamline

body with tractor airscrew running. Part II.—Airscrew in the rear position.

Johnson, Charles P. Pittsburgh city-county airport.

Aero Dugest, Vol. 19, No. 6 (Dec. 1931), New York, pp. 45-46, ills.

Johnson, J. B. Dependence of aviation on metallurgy.

Metals & Alloys, Vol. 1, No. 10 (April 1930), New York, pp. 450-454, ills., diagr. tabls.

- Fatigue of aircraft parts.

Aviation, Vol. 30, No. 8, 9 (Aug., Sept. 1931), New York, pp. 462-464, 542-545, ills, diagrs., tabls.

- Progress in aircraft material development.

Aviation, Vol. 30, No. 1 (Jan. 1931), New York, pp. 40-42, ills.

Johnson, P. G. What of 1931?

Western Flying, Vol. 9, No. 1 (Jan. 1931), Los Angeles, Cal., p. 21.

Johnson, Robert. From the Lakes to the Pacific.

Aviation, Vol. 30, No. 6 (June 1931), New York, pp. 360-363, ills.

- Into the setting sun.

Nat. Aer. Mag., Vol. 9, No. 4 (April 1931), Washington, pp. 9-16, ills.

- The new "Oregon trail."

Nat. Aer. Mag., Vol. 9, No. 8 (Aug. 1931), Washington, pp. 15-16, 25-27, ills.

- Pacific coast on parade.

Nat. Aer. Mag., Vol. 9, No. 6 (June 1931), Washington, pp. 9-11,15-16, ills.

Johnston, Samuel Paul. See Warner, Edward Pearson, and S. Paul Johnston: Aviation handbook.

Joints. See Boulton, B. C: Design of riveted joints.

Jones, Arthur Taber. The stability of a single file of straight vortices.

Physical Review, 2 ser., Vol. 38, No. 11 (Dec. 1,1931), Minneapolis, pp. 2068-2070, ills.

Jones, Bradley. The airship " Akron."

U.S. Air Services, Vol. 16, No. 6 (June 1931), Washington, pp. 21-24, ills.

- Avigation.

New York, J. Wiley & Sons, inc., London, Chapman & Hall, ltd., 1931, pp. ix, 314, ills., diagr

- The Do-X, or safety first, performance second.

U.S. Air Services, Vol. 16, No. 4 (April 1931), Washington, pp. 23-27, ills.

- A hectic week.

U.S. Air Services, Vol. 16, No. 5 (May 1931), Washington, pp. 17-20, ill.

- How high is up? or Some remarks on altitude measurements.

U.S. Air Services, Vol. 16, No. 7 (July 1931), Wasington, pp. 29-31.

- Shrinking the globe.

U.S. Air Services, Vol. 16, No. 8 (Aug. 1931), Washington, 15-19, ports.

Jones, B. Melvill, and C. E. Maitland. Records of the lateral motions of a stalled Bristol fighter aeroplane with slots upon the upper wing tips. Experiments made in the Cambridge University Air Squadron.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 824-831, diagrs. Rep. Mem. No. 1286 (Ae. 436).

Jones, D. A. The R.A.F. automatic observer Mark I A.

Aer. Res. Comm., Rep. Mem., No. 1405 (Ae. 526-T. 3108), January 1931, London, 1931, pp. 6, ills.

Jones, Ernest. Half of air accidents avoidable?

Aero Digest, Vol. 18, No. 1 (Jan. 1931), New York, pp. 49,132.

—— What of the giant airplane?

Aero Digest, Vol. 18, No. 4 (April 1931), New York, pp. 50-53, ills.

Jones, E. T. The distribution of pressure over a section of an airscrew blade in flight, and the variation of lift coefficient with the speed of the section.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 361-383, ills., diagrs., tabls. Rep. Mem. No. 1256 (Ae. 405).

- Drag and heat dissipation of three radiator systems.

Aer. Res. Comm., Rep. Mem., No. 1366 (Ae. 493-T. 3021), August 1930, London, 1931, pp. 14, ills., diagrs., tabls.

- Flight tests on an Atlas fitted with automatic slots connected with the

ailerons and some data relevant to the design of autoslots for R.A.F. 28 section wing.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 843-850, diagrs. Rep. Mem. No. 1260 (Ae. 409).

- The full scale determination of the lateral resistance derivatives of the

Bristol fighter aeroplane. Part III.—The determination of the rate of roll derivatives.

Aeronautics, Tech. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 729-735, ills., diagrs., tabls. Rep. Mem. No. 1270 (Ae. 416).

Jones, E. T., and K. W. Clark. Full scale maximum lift coefficient of R.A.F. 28 section wing.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, Lonhon, 1931, pp. 345-346, diagrs. Rep. Mem. No. 1269 (Ae. 415).

Jones, E. T. The lateral stability of the Gloster HIB seaplane with controls fixed and with directional control.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, pp. 218-224, tabl. R.A.E. Report No. B.A. 684.

Jones, E. T., and R. P. Alston. Longitudinal control and stability when stalled.

Aer. Res. Comm., Rep. Mem., No. 1367 (Ae. 494-T. 3022), September 1930, London, 1931, pp. 8, diagrs.

Jones, E. T. Measurement of incidence and speed of the S. 5 seaplane on alighting.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, 1931, pp. 340-342. R.A.E. Report No. B.A. 793.

- Measurement of landing loads.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 677-684, ills., diagrs., table. Rep. Mem. No. 1246 (Ae. 399).

Jones, E. T., and C. E. Maitland. Stalled flight tests of a Moth fitted with auto control slots and interceptors.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 851-853, diagrs. Rep. Mem. No. 1292 (Ae. 441).

Jones, H. A. The war in the air: Being the story of the part played in the great war by the Royal Air Force; Vol. 3.

New York, London, Oxford University Press, 1931, pp. 433, ills.

Jones, R., and A. H. Bell. Biplane fins on a model of R. 101.

Aer. Res. Comm., Rep. Mem., No. 1379 (Ae. 504-T. 3010), October 1930, London, 1931, pp. 13, ill., diagrs., tabls.

Jones, R, and A. H. Bell. Experiments on models of a compressed air wind tunnel.

Aer. Res. Comm., Rep. Mem., No. 1355 (Ae. 486-T. 2606, T. 3011), April 1931, London, 1931, pp. 22, diagrs., tabl.

Jones, Webster A. Barnstorming De Luxe.

Western Flying, Vol. 10, No. 3 (Sept. 1931), Los Angeles, Calif., pp. 23, 62.

Jones, W. E. F. Aircraft in China.

Aeroplane, Vol. 41, No. 18 (Oct. 28,1931), London, pp. 1026-1028, ill.

Joukowski. See Fage, A., V. M. Falkner, and W. S. Walker: Experiments on a series of symmetrical Joukowski sections.

- See Stanton, T. E.: On the distribution of pressure over a symmetrical

Joukowski section at high speeds.

Joukowski, N. Aérodynamique.

Paris, Gauthier-Villars, 1931.

Translated from the Russian by S. Drzewiecki, Second edition, revised and annotated by W. Margoulis.

Joux, Etienne Joseph François. Un dirigeable militaire: "L'Adjudant-Vincenot" (1911-1916).

Paris, E. Blondel la Rougery, 1931, pp. 47, ills., map.

Joyce, Temple N. Airplane design in relation to tactical requirements. u.S. Air Services, Vol. 16, No. 7 (July 1931), Washington, pp. 37-40, 50.

Judd, Neil M. The airplane aids the archaeologist in reconstructing an ancient civilization.

National Aeronautic Magazine, Vol. 9, No. 1 (Jan. 1931), Washington, pp. 21, 24-25, 27, 29, ills.

Judge, Arthur, William. Automobile and aircraft engines.

London, New York, Sir I. Pitman & Sons, ltd., 1931, pp. ix, 845, ills, diagrs. 2d edition, revised and enlarged.

- The testing of high speed internal combustion engines.

London, Chapman & Hall, ltd., 1931, pp. 459, ills. 2d edition, revised and enlarged.

Jugoslavia. Jugoslawien. Belgrad, Verordnung.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 20 (16. Mai 1931), Berlin, pp. 135-136.

Julliot, Ch. L. L'aviation sanitaire devant la XIVe Conférence internationale de la Croix rouge Bruxelles 6-11 octobre 1931. Paris, Chez A. Pedone.

Junkers. Un avion de fret long-courrier; le Junkers Ju. 52.

L'Aéronautique, 13me année, No. 143 (avril 1931), Paris, p. 124, ills.

- Flight in the stratosphere.

Scient. Amer., Vol. 144, No. 2 (Feb. 1931), New York, pp. 127,131.

- A flying lorry.

Flight, No. 1157, Vol. 23, No. 9 (Feb. 27,1931), London, pp. 186-187. ills.

- Junkerjättens Europa-runt-flygning.

Flygning, Ârg.9, N:R 1 (Febr. 1931), Stockholm, pp. 32, 36, ill.

- Junkers " Ju 52." Grossfrachtflugzeug für Langstrecken.

Luftschau, 4. Jahrg., Nr. 4 (24. Feb. 1931), Berlin, p. 28, ül.

Junkebs. The Junkers "Jumbo 4" takes the air.

Flight, No. 1166, Vol. 23, No. 18 (May 1, 1931), London, p. 375, ills.

- Junkers-Jumo 4, der erste Dieselflugmotor der Welt.

Luftschau, 4. Jahrg., Nr. 10 (24. Mai 1931), Berlin, p. 78, ills.

- The Junkers " Jumo 4" heavy-oil aircraft engine.

Mech. Eng., Vol. 53, No. 11 (Nov. 1931), New York, pp. 811-813, ills., diagr.

- II motore a olio pesante per aviazione, Junkers "Jumo 4."

L'Aerotecnica, Vol. 11, No. 6-7 (giug.-lugl. 1931), Roma, pp. 789-802, ills.

- Das Stratosphärenflugzeug von Junkers.

Die Umschau, 35. Jahrg., Heft 16 (18. April 1931), Frankfurt a. M., p. 319.

- See Germany: A German freight-carrier. A description of the new

Junkers Ju. 52 with B.M.W. VII or Leopard engine.

- See Rozendaal, John: Berlijnsche brief.

Junkers, Hugo. See Fisher, Joachim: Ein Wendepunkt im Luftverkehr.

- See Schaff er, Ernst: Glück ab; bahnbrecher der lüfte.

Junkers-Werbung. Flugzeugbau, motorenbau, apparatebau. Dessau, C. Dunnhaupt, 1931, pp. 68, ills.

JuRETiGH Djalma. Le esperienze del generale Balbo e le macchine aeree della navigazione di lungo corso. Conferenza tenuta il giorno 30 marzo 1931, IX, nell'aula magna della r. Scuola industriale "Giacomo da Udine" in Udine.

Udine, tip. Del Bianco e flglio, 1931.

k

K., A. The autogiro.

Scient. Amer., Vol. 144, No. 3 (March 1931), New York, pp. 192-194, ills.

- The aviator's artificial horizon.

Scient. Amer., Vol. 145, No. 6 (Dec. 1931), New York, pp. 404-406, ills.

- A convenient parachute attachment.

Scient. Amer., Vol. 145, No. 3 (Sept. 1931), New York, p. 194, ills.

- A debate about the autogiro.

Scient. Amer., Vol. 145, No. 5 (Nov. 1931), New York, p. 337, ill.

- Deck flying.

Scient. Amer., Vol, 145, No. 2 (Aug. 1931), New York, pp. 408-409, ills.

- Eine Chronik des Fluggedankens bis zum Luftverkehr im Dienste der

Völkerverbindung.

Berlin, Verlag Licht und Schatten.

- A giant wind tunnel.

Scient. Amer., Vol. 145, No. 2 (Aug. 1931), New York, p. 125, ill.

- Improving rules for airplane safety.

Scient. Amer., Vol. 145, No. 5 (Nov. 1931), New York, pp. 336-337.

- The latest in wind vanes.

Scient. Amer., Vol. 145, No. 1 (July 1931), New York, pp. 50-51, ills.

- New airplane test kit.

Scient. Amer., Vol. 145, No. 2 (Aug. 1931), New York, pp. 124-125, ill.

- A novel plane.

Scient. Amer., Vol. 145, No. 3 (Sept. 1931), New York, p. 192, ill. Single wheel plane designed by Charles Ward Hall.

■- Photography during a parachute jump.

Scient. Amer., Vol. 145, No. 6 (Dec. 1931), New York, pp. 403-404.

K., A. A rival of the autogiro?

Scient. Amer., Vol. 145, No. 5 (Nov. 1931), New York, p. 336, ill.

- Seaplane bases.

Scient.Amer., Vol. 145, No. 3 (Sept. 1931), New York, pp. 192-193, ill.

- Seaplane float test basin.

Scient. Amer., Vol. 145, No. 2 (Aug. 1931), New York, p. 124, ill.

- A sportsman's airship.

Scient. Amer., Vol. 144, No. 2 (Feb. 1931), New York, p. 126, ill.

- A submarine aircraft carrier.

Scient. Amer., Vol. 145, No. 6 (Dec. 1931), New York, p. 403, ill.

- Trial flights of the "Akron."

Scient. Amer., Vol. 145, No. 5 (Nov. 1931), New York, p. 336.

- Will flying invalidate a life insurance policy.

Scient. Amer., Vol. 145, No. 3 (Sept. 1931), New York, p. 194.

•- The world's largest amphibian.

Scient. Amer., Vol. 145, No. 6 (Dec. 1931), New York, pp. 406, 408, 111.

Kaftal, André. Réparation des domanges causes aux voyageurs dans les transport aériens.

Paris, Recueil Sirey, 1930, p. 48.

Kahn. See Dupuy, P.: The "kahn" system of map projection.

Kahn, L. Aircraft and naval technique. A study of the relationship existing between the two in design and operation.

Aircraft Engineering, Vol. 3, No. 31 (Sept. 1931), London, pp. 221-224, diagrs.

Kaiser, J. See Sattler, C. H., und J. Kaiser: Berufsawhl und Auge.

KXrmXn, Theodore von. Mechanical similitude and turbulence.

National Advisory Committee for Aeronautics, Technical Memorandums No. 611, March 19,1931, Washington, March 1931, pp. 19, diagrs.

- Die Seitenwege der luftfahrt.

Zeitschr. Flugt. Motorluftsch., 22. Jahrig., 16. Heft (28. Aug. 1931), München und Berlin, pp. 481-488, ills., diagrs.

Karsten, A. Flugzeuge fuer den Krankendienst.

Gesundheits-Ingenieur, Bd. 54, Nr. 18 (2. Mai 1931), Berlin, pp. 280-283, ills.

Kassel. Das Hochleistungs-Segelflugzeug "Kassel 25."

Luftschau, 4. Jahrg., Nr. 17 (10. Sept. 1931), Berlin, pp. 55-56, ill.

- Das neue Übungs-Segelflugzeug "Kassel 20."

Luftschau, 4. Jahrg., Nr. 11 (10. Juni 1931), Berlin, p. 87, ill.

- See Hurttig, Benno: Bericht über die Flugeigenschaften der "Kassel25."

Kean, John S. Racing seaplanes.

Aviation, Vol. 30, No. 9 (Sept. 1931), New York, pp. 518-521, ills.

Kear, Frank Gregg, and Gerald Hiles Wintermute. A simultaneous

radio-telephone and visual range beacon for the airways.

United States Bureau of Standards, Journal of Research, Vol. 7, No. 2 (Aug. 1931), Washington, pp. 261-287, ill.

Kehler, von. Christoph von Krogh.

Luftschau, 4. Jahrg., Nr. 18 (24. Sept. 1931), Berlin, p. 62.

Keister, P. H. See Thompson, Floyd La Verne and P. H. Keister: Lift and drag characteristics of a cabin monoplane determined in flight.

Kellett. The Kellett autogiro.

National Glider and Airplane News, Vol. 3, No. 2 (Sept. 1931), New York, pp. 8, 62, ill.

- Kellett side by side autogiro.

Aero Digest, Vol. 19, No. 1 (July 1931), New York, pp. 70-72, ills.

Kendall, William. Price—Its effect on sales.

Western Flying, Vol. 9, No. 6 (June 1931), Los Angeles, Cal., pp. 23-25, tabls.

Kennedy, Norman W. See Hope, W. Lawrence, and Norman W. Kennedy: A complete course for the commercial flying license.

Kepner, William E. Flight of RS-1, San Antonio, Tex., to Scott Field, 111. Monthly Weather Review, Vol. 59, No. 10 (Oct. 1931), Washington, pp. 386-388.

Kerguistel, Jan. Comparaison des avions—Abaque des plafonds.

L'Aéronautique, 13me année, No. 142, L'Aérotechnique, 9e année, No. 99 (Mars 1931), Paris, pp. 89-92, diagrs.

Kermode, A. C. See Engineering: An introduction to aeronautical engineering. For students engaged in all branches of aeronautical work. Vol. 1: Mechanics of flight.

Kerr, P. S. Fuel flowmeters designed to measure mass flow. With appendices by D. Rolinson, R. J. Penn and W. C. Cooper.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 1272-1292, diagrs., table. Rep. Mem. No. 1245 (E. 31).

Kessler, Ramon Wilke. The right to solo, a collection of the best airplane stories for boys and girls.

New York, E. P. Dutton & Co., inc., 1931, pp. 218, ills.

Keulegan, G. H. See Houseman, M. R., and G. H. Keulegan: Investigation of damping liquids for aircraft instruments—II.

Kidston, Glen. See Grey, Charles Grey: On a last testament.

Kiel, Heinrich Georg. Static longitudinal stability of "Ente" airplanes.

National Advisory Committee for Aeronautics, Technical Memorandums No. 612, March 26,1931, Washington, March 1931, pp. 27, diagrs.

King, Alfred. See Hübner, Walter: Dr.-Ing. Alfred King starb am 29. Januar 1931 den Fliegertod.

King, R. 0., and H. Moss. Detonation and lubricating oil.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 1249-1271, diagrs., tabls. Rep. Mem. No. 1318 (E. 35).

- Detonation, mineral lubricating oils and blended fuels.

Aer. Res. Comm., Rep. Mem., No. 1362 (E. 44-I.C.E. 782), July 1930, London, 1931, pp. 11, diagrs.

- Detonation, spark-plug position, and engine speed.

Engineering, Vol. 132, No. 3421 (Aug. 7, 1931) London, pp. 177-180, ills., diagrs.

King's Cup. The King's Cup.

Flight, No. 1160, Vol. 23, No. 12 (March 20, 1931), London, p. 246.

- King's Cup Air Race, 1931.

Aeroplane, Vol. 40, No. 3 (Jan. 21, 1931), London, pp. 90, 92, 94.

- "Kings Cup" 1931.

Luftschau, 4. Jahrg., Nr. 10 (24. Mai 1931), Berlin, p. 76.

King's Cup. The King's Cup race.

Aeroplane, Vol. 41, No. 4, 5 (July 22, 29, 1931), London, pp. 219-226, 261-276, ill. Flight, No. 1177, Vol. 23, No. 29 (July 17, 1931), London, p. 687, map.

- The King's Cup race 1931.

Flight, No. 1178, 1179, Vol. 23, No. 30, 31 (July 24, 31, 1931) London, pp. 711-722, 745-757, ills., parts., map.

- King's Cup under 10 Ar.

Flygning, Árg. 9, N: R 9 (Sept. 1931), Stockholm, pp. 170-171, 185, ills.

- See Heston: The race as seen at Heston.

Kingsford, A. R. Night raiders of the air: being the experiences of a night flying pilot, who raided Hunland on many dark nights during the war. London, J. Hamilton ltd., 1930, pp. 222, ills.

Kinner. See Thompson, James G.: Engine service and maintenance. Part IV— The Kinner K-5.

Kipfer, Paul. See Piccard, Auguste: Le record d'altitude battu par un ballon.

- See Piccard, Auguste, y Paul Kipfer: Tentativas del professor Piccard y

otros esfuerzos para el conocimiento de la estratosfera.

Kirschbaum, Howard William. See Dearborn, C. H., and H. W. Kirschbaum: Maneuverability investigation of an F6C-4 fighting airplane.

--See Dearborn, C. H., and H. W. Kirschbaum: Maneuverability investigation of the F6C-3 airplane with special flight instruments.

- See Thompson, Floyd La Verne, and H. W. Kirschbaum: The drag characteristics of several airships determined by deceleration tests.

Kirschner, A. Deutschlands Mitarbeit am Aufbau der griechischen Zivilluftfahrt.

Luftschau, 4. Jahrg., Nr. 13 (10 .Juli 1931), Berlin, p. 2.

Kirsten, Frederick Kurt, Harold Lamont Adams and Richard Lewis Stith. Venturi wind tunnel number 1—

Seattle, University of Washington, 1931, ills., tabls., diagrs.

Washington University, Engineering Experiment Station, Engineering Experiment Station Series, Bulletin No. 57.

Kjellson, Henry. Belysning av flyglinjer och flyghamnar.

Flygning, Arg. 9, N: R 4 o. 5 (April-Maj 1931), Stockholm, pp. 88-89, 92, ills.

- I L I S utställningen.

Flygning, Arg. 9, N: R 6 (Juni 1931), Stockholm, pp. 110-113, 126, ills.

- Westland-Hill's "Pterodactyl" IB.

Flygning, Arg. 9, N: R 2 (Febr. 1931), Stockholm, p. 29, ills.

Kleffel, Walther. Abschied vom Schneider-Pokal.

Luftschau, 4. Jahrg., Nr. 19 (10 Okt. 1931), Berlin, p. 77.

- Dem "Flieger von Tsingtau."

Luftschau, 4. Jahrg., Nr. 3 (10. Feb. 1931), Berlin, p. 19.

- Der Segelflug; ein ruhmeskapitel aus der geschichte des menschenfluges.

Für die Rhön-Rossitten-Gesellschaft Geschrieben.

Berlin, Weidmann, 1930, pp. 179, ills.

Klein, Israel. How the Navy's giant airship Akron will go to battle in time of war.

The Sunday Star, Nov. 23, 1930, Washington, D. C., pp. 12-13 ,14, ills.

Klein, Julius. A post-slump decalogue.

Western Flying, Vol. 9, No. 3 (March 1931), Los Angeles, Calif., p. 23.

Klemin, Alexander. Electrical aids to blind flying.

Scient. Amer., Vol. 145, No. 5 (Nov. 1931), New York, pp. 324-326, ills.

- The National Aircraft Show.

Scient. Amer., Vol. 145, No. 1 (July 1931), New York, pp. 26-28, ills.

Klemin, Alexander, and B. P. Ruffner. A new type of gyroplane. Wind tunnel researches and full scale tests with a gyroplane with rigidly connected feathering rotor blades .

Aircraft Engineering, Vol. 3, No. 34 (Dec. 1931), London, pp. 305-306, 320, ills., tabls.

Klemin, Alexander. Recent aircraft engineering research. Wide range of work reported at Langley Field Conference in May—Particulars of the new seaplane towing channel, 2040 ft. long at Langley Field, and also of the recently completed wind tunnel at that place, the only one yet built in which full-sized airplanes can be tested.

Mech. Eng., Vol. 53, No. 8 (Aug. 1931), New York, pp. 594-598, ills.

-- Sikorsky's contribution to huge amphibions the S-40.

Aviation Engineering, Vol. 5, No. 4 (Nov. 1931), Washington, N.J., pp. 18-21, ills., diagrs., tabls. »

- See New York University: Technical notes of the Daniel Guggenheim

School of Aeronautics, College of Engineering, New York University. No. 1—

Klemperer, W. Luftschiff-Messtechnik.

Wien, W., und F. Harms: Handbuch der Experimentalphysik, Bd. 4, 3. Teil. Hydro- und aerodynamik, Leipzig, Akademische Verlagsgesellschaft m.b.H., 1930, pp. 133-208, ills., diagrs.

Knauss, Robert. Erster Lufthansa-Postflug nach Bagdad.

Luftschau, 4. Jahrg., Nr. 2, 3 (24. Jan. 10, Feb. 1931), Berlin, pp. 10-11, 22.

Knauth, Arnold W. Federal airship foreign commerce bill.

Journal of Air Law, Vol. 2, No. 2 (April 1931), Chicago, pp. 202-206.

Knauth, Arnold W., Allen J. Furlow, Henry J. Furlow, Henry G. Hotchkiss and Emory H. Niles. 1930 United States aviation reports. Baltimore, 1930, pp. xx, 573.

Knauth, Arnold W., Henry G. Hotchkiss and Emory H. Niles. United States aviation reports 1931.

Baltimore, U.S. Aviation Reports, inc., 1931, pp xxx, 526.

Knerr H. C, and H. A. Backus. Development of steel wing beams for aircraft. Iron Age, Vol. 127, No. 9 (Feb. 26,1931), Middletown, N.Y., pp. 708-710, ills.

Knight, Montgomery, and Carl J. Wenzinger. Rolling moments due to rolling and yaw for four wing models in rotation.

National Advisory Committee for Aeronautics, Report No. 379, May 9, 1931, Washington, U.S. Government Printing Office, 1931, pp. 27, ills., diagrs., tabls.

Knight, Montgomery, and Richard W. Noyes. Span-load distribution as a factor in stability in roll.

National Advisory Committee for Aeronautics, Report No. 393, Nov. 10,1931, Washington, U.S. Government Printing Office, 1931, pp. 17, ills., diagrs., tabls.

Kober, Theodore. See Gehlen, Karl: Nachruf. Theodore Kober.

Köhler, Roosje. Dagboek van een Indie-Holland vlucht.

Het Vliegveld, löde Jaarg., No. 10, 11, 12 (Oct. Nov. Dec. 1931), Amsterdam, pp. 362-363, 395-397, 437-439, ills.

- See Geerligs, Bert Prinsen: Een praatje met Mevrouw Roosje Köhler.

Kohl-Larson, Ludwig. Die arktisfahrt des "Graf Zeppelin", im auftrage der Internationalen Gesellschaft zur Erforschung der Arktis mit Luftfahrzeugen (Aeroarctic).

Berlin, Union deutsche Verlagsgesellschaft, 1931, pp. 202, ills., map.

Kohrs, W. Nautilus und Zeppelin.

Die Umschau, 35. Jahrg., Heft 23 (6. Juni 1931), Frankfurt a.M., pp. 449-450.

Koneczny, W. E. See Tousignan, S. M., and W. E. Koneczny: Grapho-analyti-cal method of least work.

Koppen, Otto C. Progress of research and invention.

Aviation, Vol. 30, No. 1 (Jan. 1931), New York, p. 39.

Koppenhöfer, A. Versuchsentwicklung im Metallgerüstbau.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 14. Heft (28. Juli 1931), München und Berlin, pp. 421-425, ills.

Korsa. H Korsa T. 2.

Riv. Aer., Anno 7, n. 2 (feb. 1931), Roma, pp. 350-351, ills.

Koyemann, Alfred. Flugmechanische Beziehungen zwischen Fluggeschwindigkeit, Flugkosten und Flugweite und ihre Abhängigkeit von der Widerstandsfläche des Flugzeuges.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 11. Heft (15. Juni 1931), München und Berlin, pp. 329-332, tabls.

- Vergleichszahlen für Flugzeuge; Wirtschaftlichkeitsgrad und Geschwindigkeitsgrad.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 10. Heft (18. Mai 1931), München und Berlin, pp. 300-301, tabl.

Kozanecki, Stefan. Badania swierka görskiego z Worochty. (Recherches sur le sapin provement des montagnes de Worochta).

Instytut Badan Technicznych Lotnictwa, Sprawozdanie, Bulletin, No. 7, Nr. 33, Warszawa, 1931, pp. 5-9, diägrs.

- Badanie swierka görskiego z Worochty. Part II.

Instytut Badan Technicznych Lotnictwa, Sprawozdanie kwartalne Nr. 5, (Nr. 23), Warszawa, 1931, pp. 70-78, tabls. See Laski, Jaroslaw for Part I.

Kramer, George N. Repairing and service for airplanes.

Airway Age, Vol. 13, No. 1 (Jul. 4, 1931), New York, pp. 30-32, ills.

Krasinski, Hubert. See Peter, Franciszek, Stanislaw Olszewski, Jösef Dzie-woriski, i Hubert Krasinski: Badania nad zastosowaniem mieszanki alko-holowej do silnika Lorraine-Dietrich 450 km.

Krause, Daniel Edward. See McCaffery, Richard Stanislaus, and Daniel Edward Krause: Air discharge of circular tuyeres.

Kredel, Ernst. Deutsche verkehrsflug-aktiengesellschaft. Nürnberg-Fürth, Berlin, "Organisation" verlagsges., 1931.

- Luftverkehr. Deutsche Verkehrsflug-Aktiengesellschaft Nürnberg-Fürth.

Berlin, Organisation-Verlagsgesellschaft m.b.H. (S. Hirzel), 1931, pp. 82, ills.

Krell, O. Druckverteilung an der luftumströmten Kugel.

Zeitschr. Flugt. Motorluftsch., 22, Jahrg., 4. Heft (28. Feb. 1931), München und Berlin, pp. 97-105, ills., diagrs.

Kremlick, Kurt J. A survey of aviation insurance law.

Journal of Air Law, Vol. 2, No. 4 (Oct. 1931), Chicago, pp. 524-538.

Krogh, Christoph von. See Kehler, von: Christoph von Krogh.

Kromer, Hugo H. Das kleine Leistungs-Segelflugzeug "Grunau-Baby." Luftschau, 4. Jahrg., Nr. 24 (24. Dez. 1931), Berlin, pp. 138-139, ills.

Kronfeld, Robert. Wärmesegeln, ein neuer Flugsport.

Luftschau, 4. Jahrg., Nr. 17 (10. Sept. 1931), Berlin, p. 54.

Krüger, Kurt, und Hans Plendl. Horizontale Strahlungskennlinie einer Kurzwellen-Richtantenne mit gespeistem Reflektor.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 629-632, ills., diagrs.

Kruesi, G. G. A new homing device for blind flying.

Aero Digest, Vol. 18, No. 3 (March 1931), New York, pp. 39, 140-142, ills.

Kruse, Helmuth. A study of curvilinear flight.

National Advisory Committee for Aeronautics, Technical Memorandums No. 615, April 9, 1931, Washington, April 1931, pp. 22, ills., diagrs., tabls.

- Untersuchung des Kurvenfluges.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 2. Heft (28. Jan. 1931), München und Berlin, pp. 37-44, ill., diagrs., tabls.

Kubo, Kei. See Sezawa, Katsutada, and Kei Kubo: The buckling of a cylinder shell under torsion.

Kühn, Fritz. Erhöhung der Sicherheit von Luftfahrzeugen durch Bekämpfung der Brandgefahr.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 362-374, ills.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 7. 8. Heft (14., 28. April 1931), München und Berlin, pp. 197-206, 241-224, ills., tabls.

- Fire prevention on aircraft.

National Advisory Committee for Aeronautics, Technical Memorandums No. 628, July 9, 1931, Washington, July 1931, pp. 23, ills., tabls.

Küssner, Hans Georg. Beanspruchung von Flugzeugflügeln durch Böen.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 83-100, ills., diagrs.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 19. 20. Heft (14. 28. Okt. 1931), München und Berlin, pp. 579-586, 605-615, ills., diagrs., tabls.

- Optico-photographic measurements of airplane deformations.

National Advisory Committee for Aeronautics, Technical Memorandums No. 610, March 12,1931, Washington, March 1931, pp. 16, ills., diagrs.

Kuipers, C. De Armstrong-Siddeley vliegtuigmotoren.

Het Vliegveld, 15de Jaarg., No. 2-3 (Feb.-Maart 1931), Amsterdam, pp. 43-45, 79-81, ills., diagrs., tabls.

- Nieuwe Lorraine-Dietrich-motoren.

Het Vliegveld, 15de Jaarg., No. 6 (Juni 1931), Amsterdam, pp. 193-195, ills., tabl.

Kunz, Jakob. Some examples of dimensional analysis.

Physical Review, Vol. 37, No. 12 (June 15,1931), Minneapolis, p. 1701. (Abstract).

Kurtz, Oskar. Über die mechanischen Betriebsbeanspruchungen des Vergaserflugmotors.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 309-315, ills., diagrs., tabls.

Kurz, Gerhard. Measurement of visibility from the pilot's cockpit on different airplane types.

National Advisory Committee for Aeronautics, Technical Memorandums No. 646, Nov. 12, 1931, Washington, November 1931, pp. 17, ills., diagrs.

■- Messung der Sicht vom Führersitz verschiedener Flugzeugmuster.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 6. Heft (28. März 1931), München und Berlin, pp. 167-176, ills., diagrs.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 727-736, ills., diagrs.

L

L., P. Caractéristiques techniques générales.

L'Aéronautique, 13m° année, No. 144 (mai 1931), Paris, pp. 156-163, ills.

—— Un moteur de Coupe Schneider 1929; le 1600 HP Hispano-Suiza. L'Aéronautique, 13«™ année, No. 146 (juil. 1931), Paris, pp. 238-243, ills.

—— Les nouveaux systèmes Charlestop de transmission et de freinage. L'Aéronautique, 13m° année, No. 146 (juil. 1931), Paris, pp. 261-263, ills.

- Nouvelles pompes à essence.

L'Aéronautique, 13me année, No. 145 (juin 1931), Paris, pp. 224-228, ills., diagrs.

■- Le poste de commande de Bernardi à gouvernes conjuguées.

L'Aéronautique, 13m« année, No. 150 (nov. 1931), Paris, pp. 382-383, ills.

Labô, Adelaide. La chimica metallurgica nell'industria aeronáutica. Riv. Aer., Anno 7, n. 7 (luglio 1931), Roma, pp. 30-46, ills., diagrs., tabls.

Lacmann, Otto. Entzerrungsgerat für nicht ebenes Gelände.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 580-582, ills.

- Fortschritte auf dem Gebiete der Photogrammetrie.

Zeitschr. Ver. deutscher Ing., Bd. 75, Nr. 33 (15. Aug. 1931), Berlin, pp. 1047-1053, ills.

- Jahresbericht 1930 der Abteilung für Luftbildwesen und Navigation der

Deutschen Versuchsanstalt für Luftfahrt. Berlin-Adlershof.

Annuario 1930, D.V.L., R. Olderbourg, München und Berlin.

- Die neue Startmesskammer System DVL-Zeiss.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., Munich und Berlin, 1931, pp. 583-587, ills., diagrs.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 13. Heft (14. Juli 1931), München und Berlin, pp. 401-405, ills., diagrs.

- Verfahren zur raschen Berechnung der Deviationsbeiwerte aus in überschussiger Anzahl gemachten Beobachtungen.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 12. Heft (29. Juni 1931), München und Berlin, pp. 375-377, diagrs., tabl.

Jahrbuch 1931 der Deutzchen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 588-590, diagrs.

Lafay, A. Aérodynamique.—Sur les déviations, de la poussée du vent sur un cylindre, produites par de très petits ressauts superficiels. C. R. Acad. Sei., T. 192, No. 20 (18 mai 1931), Paris, pp. 1199-1201.

Lafont, A. Aceros para aviación y automovilismo.

Ibérica, Año 18, Núm. 882 (13 junio 1931), Barcelona, pp. 376-380, ills., diagrs.

Lagally, M. The frictionless flow in the region around two circles.

National Advisory Committee for Aeronautics, Technical Memorandums No. 626, June 25, 1931, Washington, June 1931, pp. 11, diagrs.

Lainé, André, et G. Guet. Comment de venir aviateur; formalités à remplir— examens à passer—écoles à choisir—les principes de pilotage. Paris, F.-L. Vivien, 1931, pp. vi, 98, ills.

Lainé, André. Manuel pratique de pilotage. Paris, Civien, 1931.

Laird, E. M. (Mattie). The Laird super-solution speedwing.

Aero Digest, Vol. 19, No. 4 (Oct. 1931), New York, pp. 76, 84, ills.

Lake, E. F. Aircraft engine crankshafts.

Heat Treating and Forging, Vol. 17, No. 4 (April 1931), Pittsburgh, Pa.., pp. 352-356, ills.

- Heat treatment of aircraft engine crankcases.

Aviation Engineering, Vol. 5, No. 5 (Dec. 1931), Washington, N.J., pp 20-23, illus.

Lake, Harley W. Merchandising airport service.

U.S. Air Services, Vol. 16, No. 3 (March, 1931), Washington, pp. 35-36.

Lallier, Roger. La Coupe Schneider est défmitivement gagnée par l'Angleterre.

L'Aérophile, 39e année, No. 10 (15 oct. 1931), Paris, p. 291, ill.

Lamarche, Paul E. Endurance monoplanes of France.

Aero Digest, Vol. 18, No. 6 (June 1931), New York, pp. 74-75,124, ills.

■- Observation and bombing airplanes of Great Britain.

Aero Digest, Vol. 18, No. 2, 3 (Feb., March 1931), New York, pp. 60-63, 82-87, ills.

- The Paris Salon de VAviation.

Aero Digest, Vol. 18, No. 1 (Jan. 1931), New York, pp. 98-99,120, ills.

Làmari, Vittorio. Sul male degli aviatori; ricerche sperimentali sul ricambio della creatina e creatinina del sangue in rappòrto alle basse pressioni barometriche e al senso di fatica degli aviatori.

Polistena, Stabilimento tipografico degli orfanelli, 1931, pp. 17.

Lamb, H. Lehrbuch der Hydrodynamik. Von H. Lamb, autorisierte deutsche Ausgabe, 2. Aufl. (nach der 5. englischen Aufl.), besorgt von Frau E. Helly, mit Geleitwort und Zusätzen von R. von Mises.

Leipzig, Verlag B. G. Teubner, pp. xvi, 872, ills.

Teubners Lehrb. der math. Wissenschaften, Bd. 26.

Lambert. See Sexton, Russell W.: Lambert-St. Louis municipal airport of 1931.

Lambert, Albert Bond. See Sexton, Russell W.: Lambert-St. Louis airport.

Laminar flow See Fage, A., and V. M. Falkner: Relation between heat transfer and surface friction for laminar flow.

Lamont, Robert. Glancing back at 1930. Civil aviation progress. Western Flying, Vol. 9, No. 1 (Jan. 1931), Los Angeles, Cai., pp. 38-39.

Lamont, Robert P. National conference on uniform aeronautic regulatory laws. Air Law Review, Vol. 2, No. 1 (Jan. 1931), New York, pp. 53-54.

Landing. See Diamond, H., and F. W. Dunmore: Airplanes land blind— guided by radio.

- See Fog: Landning i dimma med radiotekniska hjälpmedel.

- See Jaeschke, Rudolf: Ein Beitrag zur Lösung des Problems der Verkürzung

von Start und Landung bei Flugzeugen.

- See Jones, E. T.: Measurement of incidence and speed of the S. 5 seaplane on alighting.

Landing. See Jones, E. T.: Measurement of landing loads.

- See Miller, Paul A.: Airplane landings in gusty surface winds.

- See Mounier, P. J. J.: Mistbestrijding.

- See Neumark, Stefan: Hamowanie köl ladujg,cego samolotu.

- See Pabst, Wilhelm: Landing impact of seaplanes.

- See Pabst, Wilhelm: Über den Landestoss von Seeflugzeugen.

- See Pouit, R.: Calcul de la vitesse d'atterrissage d'un avion à partir de

ses caractéristiques aérodynamiques et de la vitesse verticle à l'atterrissage.

- See Pröll, A.: Notlandung von Landflugzeugen auf See.

- See Pröll, A.: Start und Landung fahrgestelloser Flugzeuge.

- See Rolinson, D.: Take-off and landing of aircraft.

- See Schmidt, Wilhelm: Development of a non-autorotative airplane capable of steep landing.

- See Taub, Josef: Load assumption for the landing impact of seaplanes.

- See Wagner, Herbert: Über die Landung von Seeflugzeugen.

- See Williams, Frank: Landings—Stall and high speed.

Landing fields. See Airports.

- See United States Department of Commerce, Aeronautics Branch: Establishment and operation of Department of Commerce intermediate landing fields. July 1, 1931.

Landing Gear. See Brakes: Wheel brakes and undercarriages.

- See Hollyhock, W. S.: Shock absorbers for aircraft landing gear.

- See Janik, Franciszek: Obliczanie podwozia samolotu metoda. sil jednost-

kowych.

- See Maiorca, Salvatore: Airplane landing gear.

- See Peck, William Cecil: Dynamic and flight tests on rubbercord and

oleo-rubber-disk landing gears for an F6C-4 airplane.

- See Peck, William Cecil, and Albert P. Beard: Static, drop, and flight

tests on Musselman type air wheels.

Landis. William B. The airplane in business.

U.S. Air Services, Vol. 16, No. 2 (Feb. 1931), Washington, pp. 26-28, ills.

- 1931 on parade.

Western Flying. Vol. 9, No. 5 (May 1931), Los Angeles, Cal., pp. 24-26, ills.

Lange, K. 0. Ergebnisse von Messungen vertikaler Windgeschwindigkeiten in der Atmosphäre.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 17. Heft (14. Sept. 1931), München und Berlin, pp. 513-519, ills., diagrs.

- Measurements of vertical air currents in the atmosphere.

National Advisory Committee for Aeronautics, Technical Memorandums No. 648, Nov. 25,1931, Washington, November 1931, pp. 9, ills., diagrs.

Langeltjttig, Albert. Criminal violations of administrative regulations. Journal of Air Law, Vol. 2, No. 2 (April 1931), Chicago, pp. 151-15S.

Langley, M. Air transport. Towards Australia. The Dutch make a good start.

Flight, No. 1150, Vol. 23, No. 2 (Jan. 9, 1931), London, pp. 36-39, ills., map.

- On solid rivets.

Aircraft Engineer, Flight Engineering Section, Suppl. to No. 1170, Vol. 23, No. 22 (May 29, 1931), London, pp. 478d-478h (36-40), ills., diagrs., tabls.

--The Royal Dutch Indian airways.

Flight, No. 1151, Vol. 23, No. 3 (Jan. 16, 1931), London, pp. 53-55, ills., map.

Langley Field. See Klemin, Alexander: Recent aircraft engineering research.

--See United States Congress. House. Committee on Military Affairs:

Additional land for Langley Field, Va. Report to accompany H.R. 10370.

Langsdorff, Werner von. Das Segelflugzeug.

München, J. F. Lehmanns Verlag, pp. 230, ills. 2., umgearbeitete Auflage.

- Taschenbuch der Luftflotten. Jahrgang 1931.

München, J. F. Lehmanns Verlag, 1931, Drei Abteilungen; Handel und Verkehr, pp. 186, ills. Sport-Luftfahrt, pp. 258, ills. Militär-Luftfahrt, pp. 224, ills.

- See Jahrbuch für Luftfahrt: Ergebnisse aus forschung, technik und

betrieb herausgegeben von Werner v. Langsdorff.

Lansdowne, Beran. Radio—How to install it on aircraft.

Western Flying, Vol. 9, No 6 (June 1931), Los Angeles, Gal., pp. 40-41, ill.

Lapresle, A. The aerodynamic wind vane and the inherent stability of airplanes.

National Advisory Committee for Aeronautics, Technical Memorandums No. 607, Feb. 26, 1931, Washington, February 1931, pp. 16, ills., diagrs.

- Le laboratoire d'aérodynamique.

L'Aërophile, 39e année, No. 8 (15 août 1931), Paris, p. 225.

Lardone, Francesco. Airspace rights in Roman law.

Air Law Review, Vol. 2, No. 4 (Nov. 1931), New York, pp. 455-467.

Larner, L., and J. Ackeret. Aeronautical education and research at the Swiss Institute of Technology in Zürich.

National Advisory Committee for Aeronautics, Technical Memorandums No. 616, April 16, 1931, Washington, April 1931, pp. 8, ills.

Larrard, J. H. B. The refuelling of aircraft in flight.

Journ. Roy. Aer. Soc, Vol. 35, No. 252 (Dec. 1931), London, pp. 1137-1145, diagrs.

Laski, Jaroslaw. Badanie sVierka görskiego z Worochty. Part I.

Instytut Badan Technicznych Lotnictwa, Sprawozdanie Kwartalne Nr. 5 (Nr. 23), Wars-zawa, 1931, pp. 55-69, ills., tabls. See Stefan Kozanecki for Part II.

- Pröby szycia plötna lotniczego.

Instytut Badan Technicznych Lotnictwa, Sprawozdanie kwartalne Nr. 2, Warszawa, 1930, pp. 37-39, diagrs.

Lasser, David. The conquest of space.

New York, Penguin Press, 1931, pp. 271, ills.

Latchford, Stephen. Aviation relations between the United States and Canada prior to negotiation of the air navigation arrangement of 1929. Journal of Air Law, Vol. 2, No. 3 (July 1931), Chicago, pp. 335-341.

Latchford, Stephen. Habana convention on commercial aviation. Journal of Air Law, Vol. 2, No. 2 (April 1931), Chicago, pp. 207-209.

Latécoère. Latécoère 38-0 flying boat (French). A long-range sesquiplane for carrying mail.

National Advisory Committee for Aeronautics, Aircraft Circulars No. 136, Feb. 27, 1931, Washington, February 1931, pp. 5, ills.

Lateral control. See Irving, H. B., and A. S. Batson: Some early model experiments on devices for improving lateral control near the stall.

Lateral stability. See Halliday, A. S., and C. H. Bürge: Lateral stability calculations for the Bristol fighter aeroplane.

Latin America. See National Foreign Trade Council: Our air mail service with Latin America.

- See Pan America.

Launching. See Take off.

- See Wackett, L. J.: Launching by catapult.

Lawrance, Charles L. Air defense from the viewpoint of the aircraft industry. U.S. Air Services, Vol. 16, No. 8 (Aug. 1931), Washington, pp. 23-26, ill.

- Air transport. The air mail service—Its development and cost.

Western Flying, Vol. 10, No. 4 (Oct. 1931), Los Angeles, Cal., pp. 21-24, tabls.

- Air transport. The economic value of the air mail system.

Western Flying, Vol. 10, No. 5 (Nov. 1931), Los Angeles, Cal., pp. 20-23.

- Air transport. Its relation to national defense.

Western Flying, Vol. 10, No. 6 (Dec. 1931), Los Angeles, Cal., pp. 22-25, ill., map.

- Air transport. What it means to the manufacturer.

Western Flying, Vol. 10, No. 2 (Aug. 1931), Los Angeles, Cal., pp. 18-22, diagrs., tabls., port

- Commentaires sur la situation aéronautique aux États-Unis.

L'Aéronautique, 13me année, No. 148 (sept. 1931), Paris, pp. 311-313, ills.

- Commercial aviation—Its relation to national defense.

U.S. Air Services, Vol. 16, No. 10 (Oct. 1931), Washington, pp. 23-25.

- Linking aircraft programs to Navy treaty strength.

U.S. Air Services, Vol. 16, No. 9 (Sept. 1931), Washington, pp. 31, 33-34.

- The opportunity of the states.

Aviation, Vol. 30, No. 10 (Oct. 1931), New York, pp. 579-582, maps.

- Toward new programs.

Airway Age, Vol. 13, No. 1 (July 4,1931), New York, pp. 22-25, ills.

- Trans-ocean airship services and Government support.

Aviation Engineering, Vol. 5, No. 5 (Dec. 1931), Washington, N.J., pp. 15-19.

- What is being done about it?

Western Flying, Vol. 10, No. 6 (Dec. 1931), Los Angeles, Cal., p. 17.

- Where the industry stands.

Aviation, Vol. 30, No. 12 (Dec. 1931), New York, pp. 678-681, diagrs., tabls.

Lawrence, David. The trend of the times. The present business readjustment is of world-wide character, as epochal as the economic changes which followed the Napoleonic wars.

Aero Digest, Vol. 18, No. 1, 2, 3, 4 (Jan. Feb. March April 1931), New York, pp. 40, 51, 46, 58. 69261—35-11

Lawrence, John. Bernt Balchen, viking of the air.

New York, Brewer, "Warren & Putnam, 1931, pp. 165, ills.

Laws and regulations. Aviation law.

Aviation, Vol. 30, No. 3 (March 1931), New York, p. 157.

- Blessures causées par un avion roulant au sol.

L'Aérophile, 39e année, No. 5 (15 mai 1931), Paris, p. 153.

- Conference on uniform air laws.

Aero Digest, Vol. 18, No. 1 (Jan. 1931), New York, pp. 104-105, ills.

- Decisions on air law.

Aero Digest, Vol. 19, No. 3 (Sept. 1931), New York, p. 46.

- Enquiries into the economic, administrative and legal situation of International Air Navigation.

Boston, U.S. Agents, League of Nations, World Peace Foundation, pp. 207, diagrs., maps.

- De nieuwe luchtvaartregeling.

Het Vliegveld, 15de Jaarg., No. 3 (Maart 1931), Amsterdam, pp. 87-93, ills.

- A plea for uniform laws.

Western Flying, Vol. 9, No. 2 (Feb. 1931), Los Angeles, Cal., p. 43.

- Recours du passager à titre gratuit contre le pilote.

L'Aérophile, 39e année, No. 7 (15. juil. 1931), Paris, p. 215.

—— Responsabilité civile de l'exploitant comparée à celle de l'automobiliste. L'Aérophile, 39eannée, No. 8 (15 août 1931), Paris, pp. 251-252.

—■— La responsabilité des organisateurs de meetings.

L'Aérophile, 39e année, No. 6 (15 juin 1931), Paris, p. 187.

——• See Air lines: New rules for airlines.

- See Allen, William M.: Limitations of liability to passengers by air

carriers.

- See Allied and associated powers: Protocol amending articles 34 and 40 of

the Convention for the Regulation of Aerial Navigation of October 13, 1919. Paris, December 11, 1929. Irish ratification on April 9, 1930.

- See American Bar Association: Report of the standing committee on

aeronautical law. Presented at the meeting held at Atlantic City, New Jersey, September 17, 18, 19, 1931.

- See Austria: Oesterreich. Gesetzgebung. Zusammenstellung der in

Oesterreich geltenden Vorschriften für den Luftverkehr.

- See Belgium: Lufttüchtigkeit. Kgl. Erlass zur Regelung der Lufttüchtigkeit von Luftfahrzeugen vom 27. December 1930.

-' See Belgium: Verordnung. Kgl. Entschliessung vom 11. Mai 1931 zur

Aenderung der Belgsichen Luftfahrtverordnung vom 27. November 1919.

- See Bessière, P.-L.: A propos des accidents causes par les avions a la

surface du sol.

- See Bessière, P.-L.: La naissance d'un droit nouveau.

- See Bessière, P.-L.: La responsabilité du transporteur.

- See Bolivia. Bolivien. Verordnung. Luftfahrtverordnung vom 24.

Okt. 1930.

Laws and regulations. See Brown, Thad H.: State regulation of radio.

- See Bulgaria: Bulgarien. Sperrgebiete.

- See Canada: Exchange of notes (August 29, and October 22, 1929) recording an agreement between Canada and the United States of America regarding the admission of civil aircraft, the issuance of pilots' licenses and the acceptance of certificates of airworthiness for aircraft imported as merchandise.

-■ See Cogliolo, Pietro: Codice aeronáutico, con appendici di aggiornamento

a tutto il 1930.

- See Colegrove, Kenneth: The international aviation policy of the United

States.

- See Colegrove, Kenneth W.: International control of aviation.

-■ See Commercial aeronautics: Le statut de l'aviation marchande.

- See Congrès international de législation aérienne: Neuvième Congrès

international de législation aérienne du Comité Juridique international de l'Aviation, tenu à Budapest du 29 septembre au 3 octobre 1930. (9th Budapest, 1930).

- See Connecticut: Connecticut laws governing aeronautics. Revised to

July 1, 1931. Office of Commissioner of Aeronautics, Hartford.

- See Cooper, John Cobb: Rules of aircraft liability in the proposed federal

Merchant Airship Act.

-■ See Denmark: Instruks for bevsegelige radiostationer om bord i skibe eller

luftfart0jer. April 1930.

- See Denmark: Kopenhagen—Mellemfort, Luftfahrtfeuer. Kopenhagen,

Schiessübungen. Kjöge-Bucht, Schiessübungen. Fredericia, Schiessübungen. Ordup By, Funkmasten.

-■ See Donovan, William J.: Origin and development of radio law.

-■ See English, Joseph F.: Air freedom: The second battle of the books.

-■ See Enriques, G.: Lo spazio atmosférico nel diritto internazionale.

- See Fagg, Fred D.: The state aeronautical regulation of 1930.

- See Fixel, Rowland W.: The seadrome and international law.

- See Fixel, Rowland W.: Use of aircraft during martial law.

- See France. Frankreich. Verordnung über Sperrgebiete sowie Benutzung und Beförderung von Lichtbildgerät in den fransösischen Kolonien.

- See Freeman, William Marshall: Air and aviation law (civil aviation)

being an exposition of the statute and case law affecting air navigation.

- See Garcia, Gonzalo: Problemas jurídicos que la aviación plantea.

- See Germany: Deutschland. Darmstadt, Flughafen. Nürnberg-Fürth,

Flughafen. München-Oberwiesenfeld, Flughafen. Wilhelmshaven, Wasserflughafen. Warnemünde, Schiessübungen. Spreenhagen, Schiessübungen. Meppen, Schiessübungen. Kolberg, Schiessübungen. Tenkitten (Ostpr.), Schiessübungen. Nürnberg, Schiessübungen. Ungültigkeit einer Genehmigung. Ungültigkeit von Genehmigungen. Klasseneinteilung von Flugzeugen.

Laws and regulations. See Germany. Gesetz zu dem Abkommen zwischen dem Deutschen Reich und Grossbritannien über Aenderung des Luftverkehrsabkommens vom 29. Juni 1927. Vom 31. März 1931.

- See Giannini, Amedeo: La nazionalità degli aeromobili.

- See Giannini, Amedeo: Saggi di diritto aeronautico.

- See Gottscho, Ernst: Luftverkehrsrecht; luftverkehrsgesetz und luft-

verkehrsverordunng nebst ergänzendem anhang; mit einleitung, erlauterungen, tabellen und Sachverzeichnis.

- See Great Britian: Agreement between His Majesty in respect of the

United Kingdom and the President of the German Reich amending the agreement of June 29, 1927 relating to air navigation. Berlin, July 5, 1930. Ratifications exchanged at Berlin, May 6, 1931.

--See Great Britian: Exchange of notes between His Majesty's governments

in the United Kingdom, Canada, the Commonwealth of Australia, New Zealand, and the Union of South Africa and the Government of India, and the Italian government respecting documents of identity for aircraft personnel. London, April 13, 1931.

- See Great Britian: Grossbritannien. Ausführungsbestimmungen. Vom

20. Dezember 1930 zur britischen Luftfahrt Verordnung vom 19. Dezember 1923.

- See Great Britian: Nachtflugübungen. London, Flughafen. Zollfiug-

häfen. Verordnung.

- See Great Britian: Signale zwischen Luftfahrzeugen und Schiffen. Kairo-Kapstadt, Luftverkehr. Jersey, Verordnung.

- See Great Britain: Verordnung. Britische Luftfahrtverordnung vom 19.

Dezember 1923 unter Berücksichtigung der bis einschliesslich 1930 vorgenommenen Abänderungen.

- See Greece: Sperrgebiete. Verordnung vom 24. November 1930 betreffend

Festsetzung der für die Luftfahrt verbotenen Zonen.

- See Greece: Verordnung vom 24. November 1930 betreffend Benachrichtigung wegen Ueberfliegens oder Landung auf griechischem Staatsgebiet durch Privatflugzeuge.

- See Greece: Vorschriften betreffend den Besuch ausländischer Luftfahrzeuge in Griechenland.

- See Hahn, Kurt: Die deutschen luftVerkehrsabkommen.

- See Harriman, Edward A.: Federal and state jurisdiction with reference

to aircraft.

- See Honduras: Ley de aviación.

- See Idaho: Idaho aeronautics law, air navigation facilities, air marking,

licensing and regulation, miscellaneous information.

- See Illinois: Air traffic rules of the State of Illinois prescribed by the

Illinois Aeronautics Commission and effective November 23, 1931.

- See International Commission for Air Navigation: What the I.C.A.N, is.

Laws and regulations. See Ireland: Verordnung. Irische Luftfahrtverordnung vom. 6 März 1930.

- See Italy: Testo unico delle leggi e regolamento sulla requisizione dei

quadrupedi e veicoli per il r. esercito, per la r. marina e perla r. aeronautica.

- See Japan: Verkehrsvorschriften.

- See Jugoslavia; Jugoslawien. Belgrad, Verordnung.

- See Knauth, Arnold W., Allen J. Furlow, Henry J. Fulow, Henry G.

Hotchkiss and Emory H. Niles: 1930 United States aviation reports.

- See Kremlick, Kurt J.: A survey of aviation insurance law.

- See Lamont, Robert P: National conference on uniform aeronautic regulatory laws.

- See Langeluttig, Albert: Criminal violations of administrative regulations.

- See Lee, Blewett: Freedom of the air in the United States.

- See Lettland: Zollaufsicht. Verordnung vom 30. April 1931 über die

Zollaufsicht im Luftverkehr.

- See Lin, Wo-chiang: The development of aviation and aeronautical law

in China.

- See Logan, George B.: The present status and the development of aviation

law.

- See MacKenzie, Robert J.: The regulation of aerial common carriers.

- See Malay States: Malayen-Staaten. Verordnung.

- See Mexico: Mexiko. Gesetz. Mexicanisches Luftverkehrsgesetz vom 31.

December 1929.

- See Meyer, Alex: Das Neutralitätsrecht im Luftkriege.

- See Michigan: Laws relating to aeronautics.

- See National Conference on Uniform Aeronautic Regulatory Laws: Proceedings of the National Conference on Uniform Aeronautic Regulatory Laws, December 16 and 17, 1930, Washington, D.C.

- See New York State: Laws affecting aviation of the State of New York.

Published by the New York State Commission on Aviation.

- See Oregon: Oregon aeronautic laws regulating flying and registering

aviators.

- See Osterhout, Howard: The doctrine of res ipsa loquitur as applied to

aviation.

- See Palastine: Palätina. Verordnung.

- See Portugal: Verordnung.

- See Prochasson, Roger: Le risque de Pair.

:- See Quindry, Frank E.: Aerial bombardment of civilian and military

objectives.

Laws and regulations. See Rentschler, Frederick B.: Importance of uniform aeronautic regulatory laws to the aircraft industry.

- See Rhodesia: Nord-Rhodesien. Sperrgebiete.

- See Rhodesia: Süd-Rhodesien. Gestez.

- See Rohlfing, Charles Carroll: National regulation of aeronatucis.

- See Roper, Albert: La Convention internationale du 13 octobre 1919 portant réglementation de la navigation aérienne.

- See Segal, Paul M.: The regulation of amateur radio communication.

- See South Africa: Verordnung. Luftfahrtverordnung vom. 9 August 1939.

- See Spain: Verordnung betreffend den Betrieb der Hilsflughäfen Kap

Juby und Villa Cisneros.

- See Switzerland: Flughafengebühren. Reglement des Eigenössischen

Luftamtes vom 3. Dezember 1930 über die Flugplatztaxen, gütig ab 1. Januar 1931 für die Schweiz. Zollflugplätze.

- See Switzerland: Schweiz. Motorloser Flug. Reglement betreffend die

Organisation der Aufsicht über das motorlose Flugwesen vom 14. Dezember 1930.

- See Tauber, Ernst: Haftung des Luftfahrzeughalters und Reichs versiche-

rungsordung.

- See Turkey: Ueberflug.

- See Turner, Ellwood J.: Résumé of experience of Pennsylvania in state

regulation.

- See Tuttle, Alonzo Hubert, and Dale Elmer Bennett: Extent of power of

Congress over aviation.

- See United States Congress. House. Committee on Foreign Affairs:

International Technical Committee of Aerial Legal Experts. Report to accompany H.J. Resolution 299.

- See United States Department of Commerce. Aeronautics Branch: Air

commerce regulations. Effective December 31, 1926. Effective as amended September 1, 1929.

- See United States Department of Commerce. Aeronautics Branch: Air

commerce regulations. Effective as amended January 1,1931.

- See United States Department of Commerce. Aeronautics Branch: Air

commerce regulations governing alterations and repairs to licensed aircraft. Effective January 1,1931.

- See United States Department of Commerce. . Aeronautics Branch: Air

traffic rules. Extract from air commerce regulations December 1, 1929.

- See United States Department of Commerce. Aeronautics branch: Airworthiness requirements of air commerce regulations for aircraft. Effective January 1, 1931.

- See United States Department of Commerce. Aeronautics Branch: Airworthiness requirements of air commerce regulations for aircraft. Effective as amended January 1,1932.

Laws and regulations. See United States Department of Commerce. Aeronautics Branch: Department of Commerce regulations governing entry and clearance of aircraft effective as amended April 7, 1931, and United States airport of entry regulations effective November 1,1931.

- See United States Department of Commerce. Aeronautics Branch:

Regulations governing establishment and certification of aeronautical lights and instructions for marking obstructions to air navigation. August 1, 1930.

- See United States Department of Commerce. Aeronautics Branch:

School supplement of Air Commerce Regulations. Effective as amended January 1, 1931.

- See United States Department of Commerce. Aeronautics Branch. State

aeronautical legislation and compilation of State laws. Revised to September 1, 1929.

- See United States Department of State: Regulations to govern air navigation in the Canal Zone. Promulgated by the Secretary of State. September 22, 1931.

- See Veeder, Van Vechten: The legal relation between aviation and

admiralty.

- See Wenneman, Joseph H: Municipal airports; history, development and

legal aspect of municipal airports, text of federal acts and regulations, digests of State aviation laws and of the State enabling acts, ordinances of principal cities having airports on main airways, legal and business forms in use in the aviation industry.

- See Wingfield, Lawrence Arthur, and Reginald Brabant Sparks: The law

in relation to aircraft.

- See Wüstendörfer, Hans: Wege und ziele des kommenden weltluftrechts,

namentlich im hinblick auf den überseeischen luftverkehr.

Lawson, I. N., Jr., The business of running a flying school. Article I: Field operations, flight schedules, student appointments. Article II: Equipment, maintenance, shop practice.

Aero Digest, Vol. 18, No. 3, 4 (March April 1931), New York, pp. 48-49,126-128, 182-184, ills.

Lazazzera, Rocco. Finn Malmgren l'eroe polare. Roma-Foligno, F. Campitelli, 1931, pp. 368, ills.

Leblanc. Le prix Alfred Leblanc.

L'Aérophile, 39e armée, No. 8 (15 août 1931), Paris, p. 235.

Le Brocq, L. F. See Sutton, H., and L. F. Le Brocq: The protection of magnesium alloys against corrosion.

Lechéne, A. Les nouveaux brevets de pilote français et allemands. L'Aérophile, 39e année, No. 3 (15 mars 1931), Paris, pp. 67-69, ills.

Lederer, Jerome. What it costs to operate a business plane.

Western Flying, Vol. 9, No. 5 (May 1931), Los Angeles, Calf., 28-31, ill., tabls.

Lee, Blewett. Freedom of the air in the United States.

American Journal of International Law, Vol. 25, 1931, Concord, N.H., pp. 238-251.

Lee, John G. On the lift and drag of wings.

Airway Age, Vol. 12, No. 2 (Feb. 1931), New York, pp. 138-141, diagrs, tabls.

Legislation. See MacCracken, William P., Jr.: National conference on uniform aeronautic regulatory laws. Special problems in aeronautic legislation.

LéGLiSE, Pierre. The Bernard 120 seaplane (French). A 1400 hp single-seat monoplane racer.

National Advisory Committee for Aeronautics, Aircraft Circulars No. 139, March 17, 1931, Washington, March 1931, pp. 5, ills.

- Clerget 100 hp heavy-oil engine.

National Advisory Committee for Aeronautics, Technical Memorandums No. 603, Jan. 29, 1931, Washington, January 1931, pp. 10, ills.

- A French Diesel engine. The 100 h.p. compression ignition engine designed

by M. Clerget for the Service Technique.

Aircraft Engineering, Vol. 3, No. 25 (March 1931), London, pp. 53-5-1, ills.

- Les moteurs français du dernier Salon.

L'Aéronautique, 13me année, No. 140, Bulletin L'Aérotechnique, 9e année, No. 98 (Jan. 1931), Paris, pp. 49-58, ills.

- The new " Charles top " remote brake transmission and control.

National Advisory Committee for Aeronautics, Technical Memorandums No. 640, Oct. 1, 1931, Washington, October 1931, pp. 3, ills.

- Superchargers.

National Advisory Committee for Aeronautics, Technical Memorandums No. 631, July 31, 1931, Washington, July 1931, pp. 26, ills., diagrs., tabls.

Lehmann, G. D. See Jenkin, C. F., and G. D. Lehmann: High frequency fatigue.

Lehr, Ernst. Schwingungstechnik. 1. Band. Grundlagen. Die Eigenschwingungen eingliedriger Systeme.

Berlin, Verlag Julius Springer, 1930, pp. 295, ills.

Leipzig. See Bongenhielm, Folke: Flygplatsen halle—Leipzig.

Lemke, Hans. Ratgeber für deutsche Sportflieger bei Auslandsflügen; eine Zusammenstellung der luftverkehrsvorschriften der europäischen länder unter besonderer berücksichtigung der flugbestimmungen, einflugzonen und Sperrgebiete.

Berlin, Verlag und Druck Gebr. Radetzki, 1931, pp. 168.

Lemoing, C. Le premier vol sans moteur vers 1806 à Angoulême. Angouléme, Impr. de "La Charente", 1931, pp. 33, ills.

Leonardo da Vinci. See Verga, Ettore: Bibliografia vinciana, 1493-1930.

Lerat, J. Hydrodynamique.—Mouvement lent d'un fluide visqueux à deux dimensions limité par des parois fixés.

C. R. Acad.Sci., T. 193, No. 23 (7 dec. 1931), Paris, pp. 1165-1166.

Lettland. Zollaufsicht. Verordnung vom 30. April 1931 über die Zollaufsicht im Luftverkehr.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 44 (31.Okt.1931), Berlin, pp. 322-324.

Leva, Fattsto M. Le applicazioni del giroscopio sul mare e nell'aria. Riv. Aer., Anno 7, N. 9 (sett. 1931), Roma, pp. 393-402, ills.

Lewis, H. C. Aircraft finishing of today.

National Glider and Airplane News, Vol. 3, No. 2 (Sept. 1931), New York, pp. 13-14, 66, ills.

Let, Willy. Die fahrt ins weltall.

Leipzig, Hachmeister & Thai, 1929, pp. 83, ills., diagrs.

Liberty Engine. See Dayton Engineering Laboratories Co.: Service manual, covering the Delco system installed on the Liberty aviation engine.

Library of Congress. See Zahm, Albert Francis: Origin and progress of the Division of Aeronautics.

Licensing. Federal licensing of airman.

Aero Digest, Vol. 18, No. 5 (May 1931), New York, pp. 35-45,122, ills.

Liege. See Guider, John W.: The juridical congress on wireless telegraphy at Li6ge.

- See Guilder, John W.: The Liege congress of the international committee on

wireless telegraphy.

Lienesch, C. F. The handicap derby.

Western Flying, Vol. 10, No. 4 (Oct. 1931), Los Angeles, Cal., pp. 15-16.

Lift. See Alston, R. P.: Maximum lift coefficient of "Starling" with Clark YH wings.

- See Bradfield, F. B., K. W. Clark, and R. A. Fairthorne: Maximum lift

in closed and open jet tunnels.

- See Crouch, A.S.: Measurement of lift and drag of Southampton seaplane.

- See Fowler, Harlan D.: Variable lift.

- See Hartshorn, A. S.: The influence of a fuselage on the lift of a monoplane.

- See Lee, John G.: On the lift and drag of wings.

- See Lusk, Hilton F.: A philosophy of lift.

- See Münk, Max Michael: The creation of lift by a wing section.

- See Münk, Max Michael: The distribution of lift.

- See Münk, Max Michael: Means for increasing the lift.

- See Ormerod, A.: Full scale measurements of lift coefficients of a Bristol

fighter with R.A.F. 34 wings and slots.

- See Theodorsen, Theodore: On the theory of wing sections with particular

reference to the lift distribution.

- See Thompson, Floyd La Verne, and P. H. Keister: Lift and drag characteristics of a cabin monoplane determined in flight.

- See Töpfer, Carl: Lift distribution and longitudinal stability.

Light aeroplanes. See Bradbrooke, F. D.; The light aeroplane manual.

Lighting. Aga flygfyrar.

Flygning, Arg. 9, N:E 4 o. 5 (April-Maj 1931), Srockholm, pp. 90-92, ills.

- Ground lighting equipment. The fundamental considerations and detailed design of lights for airway and aerodrome use.

Aircraft Engineering, Vol. 3, No. 32 (Oct. 1931), London, pp. 255-260, ills., diagrs.

- See Cost, R. W.: Hangar lighting and safety.

- See Germany: Berlin-Hannover-Westgrenze, Luftfahrtfeuer.

- See Kjellson, Henry: Belysning av flyglinjer och flyghamnar.

- See Mackall, K. W.: U.S. aerodrome lighting. Details and characteristics

of the various types of aerodrome lights in current use.

Lighting. See Ritchie, H. C: New airport lighting development.

- See United States Department of Commerce. Aeronautics Branch:

Notes on airport lighting. April 15, 1929.

- See Young, D. C: The airplane's lighting problems.

Lightning. See Austin, A. 0.: Lightning investigation as applied to the airplane.

Lilienthal, Otto. See Schäffer, Ernest: Glück ab; bahnbrecher der lüfte.

Limhamn. Ab. flygindustri, Limhamn.

Flygning, Arg. 9, N:R 4 o. 5 (April-Maj 1931), Stockholm, pp. 80-81, ills.

Limits. See Rodger, R.: Limits, fits, and allowances.

Lin, Wo-chiang. The development of aviation and areonautical law in China. Journal of Air Law, Vol. 2, No. 2 (April 1931), Chicago, pp. 159-175.

Lindbergh, Charles Augustus. See Haines, Lynn: The Lindberghs.

- See Lockheed: Lindbergh's Lockheed seaplane.

- See Schäffer, Ernst: Glück ab; bahnbrecher der lüfte.

Lindbergh, H. A. Minneapolis municipal airport.

Aero Digest, Vol. 18, No. 5 (May 1931), New York, pp. 90-92, ill.

Lindner, C. J. Blindflygning och dess instrument.

Flygning, Arg. 9, N:R 1 (Jan. 1931), Stockholm, pp. 8-9, ills.

Lioy, Vincenzo. Cooperazione aero-terrestre.

Riv. Aer., Anno 7, n. 2 (feb. 1931), Roma, pp. 240-256.

Lippisch, Alexander. The development, design and construction of gliders and sailplanes.

Journ. Roy. Aer. Soc, Vol. 35, No. 247 (July 1931), London, pp. 532-578, ills.

—— The development, design, and construction of gliders and sailplanes.

National Advisory Committee for Aeronautics, Technical Memorandums No. 637, Sept. 12, 1931, Washington, September 1931, pp. 38, ills.

- See Stamer, Fritz, und A. Lippisch: Gleitflug und Gleitflugzeuge. Teil II.

Bauanweisungen und Bauzeichnungen.

Lippman, H. E. Design of municipal airports. Part one—Preliminary organization and selection of a site. Part two—Planning the airport and airport buildings. Part three—The Placing and construction of buildings are important.

Airway Age, Vol. 12, Nos. 4, 5, 10 (Apr., May, Jun., 1931), New York, pp. 359-361, 473-475, 586-587, ills.

Lipscomb, C. P. "Crusader" aircraft. Single-seater high-speed float seaplane. Constructional report.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, 1931, pp. 320-324, ills.

Liptrot, R. N. Modern development in the helicopter.

Journ, Roy. Aer. Soc, Vol. 35, No. 247 (July 1931), London, pp. 624-632.

Litten, Frederic Nelson. Brooks of the Valley Airways . . . Illustrated by Sven Elven.

New York, London, D. Appleton and Company, 1931, pp. 280, ills.

Little, Delbert M. Some effects of California mountain barriers on upper air winds and sea-level isobars.

Monthly Weather Review, Vol. 59, No. 10 (Oct. 1931), Washington, pp. 376-380, maps, diagrs.

Little Rock, Ark. See United States Congress. House. Committee on Military Affairs; Lease portions of Air Depot, Little Rock, Ark. . . . Report to accompany H.R. 15493.

Llave, Joaquín de la. La lucha entre el dirigible y el avión.

Ibérica, Año 18, Núm. 874 (18 abril 1931), Barcelona, pp. 246-247, ill.

- Travesía del océano por una escuadra de hidros italianos.

Ibérica, Año 18, Núm. 869 (14 marzo 1931), Barcelona, pp. 161, 165-166, ill.

- See Autogiro: El viaje más largo hecho en autogiro.

- See R. 101: El informe pericial sobre el accidente del "R. 101."

Load. Load factors.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, p. 58.

- More miles, more loads. A review of the progress of air transportation in

1930.

Western Flying, Vol. 9, No. 3 (March 1931), Los Angeles, Cal., pp. 36-37, diagrs.

- See Helmbold, H. B.: Über Flugleistungsstatistik.

- See Jones, E. T.: Measurement of landing loads.

- See Miller, Roy A.: A solution of the circular ring.

- See Rhode, Richard V., and Eugene E. Lundquist: Preliminary study of

applied load factors in bumpy air.

•- See Sänger, Eugen: Zur genauen Berechnung vielholmigparallelsteigiger,

ganz- und halbfreitragender, mittelbar und unmittelbar belasteter Flügelgerippe.

- See Schmeidler, Werner: Eine Formel für das Rollmoment bei Tragflügeln.

- See Taub, Josef: Load assumption for the landing impact of seplanes.

-- See Thalau, Karl: Zur Frage der Belastungsannahmen für Flugzeuge.

Loads and stresses. See Evans, F. G.: The method "least work" and the stressing of aeroplane structures.

Lock, C. N. H., and H. Bateman. Airscrews at negative torque.

Aer. Res. Comm., Rep. Mem., No. 1397 (Ae. 518-T. 3057), January 1931, London, 1931, pp. 5, diagrs., tabls.

Lock, C. N. H. The application of the theoretical velocity field around a spheroid to calculate the performance of an airscrew near the nose of a streamline body.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 415-418, diagrs. Rep. Mem. No. 1239. (Ae. 394.)

- The effect of body iterference on the efficiency of an airscrew.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 407-414, diagrs. Rep. Mem. No. 393 (Ae. 393.)

- The equations of motion of a viscous fluid in tensor notation.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 135-162, diagr. Rep. Mem. No. 1290 (Ae. 439).

Lock, C. N. H. The interference of a wind tunnel on a symmetrical body.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 615-634, diagrs., tabls. Rep. Mem. No. 1275. (Re. 421.)

Lock, C. N. H., and A. R. Collar. Exploration of the flow near the screw proposed for the N. P. L. compressed air tunnel.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 384-393, ill., diagrs., tabls. Rep. Mem. No. 1923 (Ae. 442.)

Lock, C. N. H., and F. C. Johansen. Pressure plotting a streamline body with tractor airscrew running. Part II.—Airscrew in the rear position.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 419-435, ills., diagrs., tabls. Rep. Mem. No. 1284. (Ae. 434.)

Lockheed. The installation of floats on Colonel Lindbergh's special Lockheed Sirius.

National Glider and Airplane News, Vol. 3, No. 2 (Sept. 1931), New York, pp. 9-10, ills.

- Lindbergh's Lockheed seaplane.

Aero Digest, Vol. 19, No. 1 (July 1931), New York, pp. 60-64, ills.

- The Lockheed "Vega".

Flight, No. 1162, Vol. 23, No. 14 (April 3,1931), London, pp. 288-289, ills.

Lockspeiser, B. Ventilation of 24-ft. wind tunnel.

Aer. Res. Comm., Rep. Mem., No. 1372 (Ae. 499-T.3096), February 1931, London, 1931, pp. 10, ills., diagrs.

- See Clark, K. W., and B. Lockspeiser: Wind tunnel tests on aerofoils at

negative incidences.

Lössl, E. v. Der Einfluss des Holmgewichtes auf die Bauspannweite und die Flugleistungen von Grossflugzeugen.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 6. Heft (28. Marz 1931), München und Berlin, pp. 157-161, diagrs.

Löwental. See Scharnow, C: Luftschiffhalle Löwental.

Logan, George B. The present status and the development of aviation law. Journal of Air Law, Vol. 2, No. 4 (Oct. 1931), Chicago, pp. 510-523.

Logan, Hub. Hospitality—Pueblo style.

Western Flying, Vol. 10, No. 6 (Dec. 1931), Los Angeles, pp. 30-32, ills.

Lohr, A. Cloud flights.

Monthly Weather Review, Vol. 59, No. 11 (Nov. 1931), Washington, pp. 430-431.

London. See McAdie, Alexander, and E. Gold: Meteorological conditions during the air raid on London, Oct. 19-20, 1917.

Long, M. A. Airports for seaboard cities.

Aero Digest, Vol. 19, No. 2 (Aug. 1931), New York, p. 74, ill.

Long Island. See Birnn, Roland: An aerial jaunt around Long Island.

Longitudinal control. See Jones, E. T., and R. P. Alston: Longitudinal control and stability when stalled.

Lorraine-Dietrich. See Peter, Franciszek, Stanislaw Olszewski, Jösef Zie-woriski, i Hubert Krasinski: Badania nad zastosowaniem mieszanki alkot-holowej do silnika Lorraine-Dietrich 450 KM.

Los Angeles. See Davidson, Walter V.: Winter flying from Denver to Los Angeles.

- See Dayhoff, Clancey: Los Angeles county airport plan.

Lost planes. See Steele, Dudley: Searching from the air.

Loth, William. See Ide, John Jay: The Loth system of navigation by rotating radio beacons.

Lötz, Irmgard. Berechnung der Auftriebsverteilung beliebig geformter Flügel.

Zeitschr. Flugt. Motorluftseh., 22. Jahrg., 7. Heft (14. April 1931), München und Berlin, pp. 189-195, diagrs.

Love, Francis H. Precedents to guide the aeronautical exporter.

Aero Digest, Vol. 18, No. 4 (April 1931), New York, pp. 36, 238-240, ill.

Lowell, James R. For business and pleasure, Martin uses a plane.

Western Flying, Vol. 10, No. 1 (July 1931), Los Angeles, Cal., pp. 30-31, ills.

Lower, J. H. Some notes on flying boats and seaplanes.

Journ. Roy. Aer. Soc, Vol. 35, No. 246 (June 1931), London, pp. 515-528, ills., diagrs.

Lubricants. See Costanzi, Giulio: II problema del lubrificante nazionale per i motori a scoppio e la coltivazione del ricino in Italia.

Lubricating oil. See King, R. 0., and H. Moss: Detonation and lubricating oil.

Lubrication. See Andriani, Oronzo: Lubrificazione appropriata dei motori d'aviazione a carratteristiche dei lubrificanti.

- See King, R. 0., and H. Moss: Detonation, mineral lubricating oils and

blended fuels.

- See Mielnikowa, Boleslawa: Charakterystyka smaröw lotniczych.

- See Oils: Aviation engine oil.

--See Wagner, Lawrence T.: Lubrication.

Luftfahrt. Luftfahrt. Politische eihflüsse. Luftfahrzeugbau. Luftschiffahrt. Motorenbau. Luftverkehr. Segelflug.

Zeitschr. Ver. deutscher Ing., Bd. 75, Nr. 1 (3. Jan. 1931), Berlin, pp. 28-29, ills.

LuNARDi, Vincenzo. See Morazzoni, Giuseppe: Un pioniere delPaeronautica, Vincenzo Lunardi; documenti inediti e saggio iconografico, raccolti da G. Morazzoni.

Lundborg, Einar. See Vitt, Leonard: Einar Lundborg.

Lundquist, Eugene E. See Rhode, Richard V., and Eugene E. Lundquist: Applied load factors in bumpy air. A preliminary study in the light of the meteorological data at present available.

- See Rhode, Richard V., and Eugene E. Lundquist: Preliminary study of

applied load factors in bumpy air.

>- See Rhode, Richard V., and Eugene E. Lundquist: The pressure distribution over a modified elliptical wing tip on a biplane in flight.

- See Rhode,; Richard V., and Eugene E. Lundquist: The pressure distribution over a semicircular wing tip on a biplane in flight.

- See Rhode, Richard V., and Eugene E. Lundquist: The pressure distribution over a square wing tip on a biplane in flight.

- See Rhode, Richard V., and Eugene E. Lundquist: Pressure distribution

over the fuselage of a PW-9 pursuit airplane in flight.

Lundquist, Eugene E. See Rhode, Richard V., and Eugene E. Lundquist: Strength tests on paper cylinders in compression, bending, and shear.

Lusk, Hilton F. A philosophy of lift.

U. S. Air Services, Vol. 16, No. 3 (March, 1931), Washington, pp. 15-18, ills.

Lynam, E. Notes on the flutter of airscrew blades.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 436-440, diagrs. Rep. Mem. No. 1258. (Ae. 407.)

Lynx. See Raffaelli, Italo: Apparecchio Ba/33 con [motore] Lynz suralimentato.

Lyon, Darwin O. Il razzo nella meteorologia e nella scienza.

L'Aerotecnica, Voi. 11, n. 11 (nov. 1931), Roma, pp. 1421-1431, diagrs. Abstract in English pp. 1490-1491.

Lyon, Edwin B. On duty with the Air Corps in Panama.

National Aeronautic Magazine, Vol. 9, No. 1 (Jan. 1931), Washington, pp. 9-12, ills.

M

Maas, H. J. van der. Bezoek aan Rossitten en wasserkuppe.

Het Vliegveld, 15de Jaarg., No. 12 (Dec. 1931), Amsterdam, pp. 427-429, ills.

McAdie, Alexander. Airgraphics.

Cambridge, Mass., Harvard University Press; London, Oxford University Press, 1931, pp. 377, ills.

Cambridge, Mass., Published by the Observatory, 1931, p. 37, diagrs., tabls.

McAdie, Alexander, and E. Gold. Meteorological conditions during the air raid on London, Oct. 19-20, 1917.

Nature, Vol. 127, No. 2197 (Feb. 7, 1931), London, p. 198.

McAlery, C. M. The air exercises.

Aeroplane, Vol. 41, No. 5 (July 29,1931), London, pp. 301-314, ills., map

- The annual dinner of the air league.

Aeroplane, Vol. 40, No. 17 (April 29,1931), London, pp. 758,760.

- At Calshot.

Aeroplane, Vol. 41, No. 12 (Sept. 16,1931), London, pp. 704-718, ills.

- The British team.

Aeroplane, Vol. 41, No. 11 (Sept. 9,1931), London, pp. 636-646a, ports.

- Compulsory piloting.

Aeroplane, Vol. 41, No. 9 (Aug. 26,1931), London, p. 514.

- The debate on airship policy.

Aeroplane, Vol. 40, No. 20 (May 20,1931), London, pp. 928, 930,932.

- The debate on the air estimates.

Aeroplane, Vol. 40, No. 12 (March 25,1931), London, pp. 501-502,504,506,508,510.

- The Royal Air Force in 1930.

Aeroplane, Vol. 40, No. 1 (Jan. 7,1931), London, pp. 12,14-15, ills.

—i— The Royal Air Force of to-day.

Aeroplane, Vol. 40, No. 25 (June 24, 1931), London, pp. 1182,1184-1184B, 1186,1188, ills.

- The twelfth Royal Air Force Display.

The Aeroplane, Vol. 41, No. 1 (July 1,1931), London, pp. 20-38, ills.

- The work and training of the Royal Air Force.

Aeroplane, Vol. 40, No. 9,16 (March 4, April 22, 1931), London, pp. 370, 372, 374, 376, 718, 720-721, ills.

McAlery, C. M. The work and training of the Royal Air Force. Ill— communications.

Aeroplane, Vol. 40, No. 22 (June 3,1931), London, pp. 1034,1036,1038-1039, ills.

McCaffery, Richard Stanislaus, and Daniel Edward Krause. Air discharge of circular tuyeres.

New York, American Institute of Mining and Metallurgical Engineers, inc., 1931, pp. 10, ills., tabls. Technical Publication No. 385, Class C, Iron and Steel, No. 64.

McClench, Marion H. On becoming air-minded.

U.S. Air Services, Vol. 16, No. 2 (Feb. 1931), Washington, pp. 52, 54.

MacCracken, William P., jr. National conference on uniform aeronautic regulatory laws. Special problems in aeronautic legislation. Air Law, Review, Vol. 2, No. 4 (Nov. 1931), New York, pp. 479-484.

MacCracken, William Patterson. See New York: Report of the fact-finding committee on suitable airport facilities for the New York metropolitan district.

MacCreadie, William Thomas. On the stability of the motion of a viscous fluid.

Proceedings of the National Academy of Sciences, Vol. 17, No. 6 (June 1931), Washington, D.C., pp. 381-388.

McCudden, James Thomas Byford. Flying fury. London, J. Hamilton ltd., 1930, pp. xvii, 270, ills. Introduction by O. G. Grey. Ulutsrated by Leonard Bridgman.

McCutcheon, W. W. Aircraft finishes.

Aero Digest, Vol. 19, No. 2 (Aug. 1931), New York, pp. 49,128, ills.

Macdonald, Austin F. Airport problems of American cities.

Annals of the American Academy of Political and Social Science, Vol. 151, Philadelphia, 1930, pp. 60.

McDonnell, J. S., Jr. Present status of transatlantic service. Airway Age, Vol. 12, No. 5 (May 2,1931), New York, pp. 460-461.

- Trans-Atlantic service. Parts 1, 2, and 3.

Airway Age, Vol. 12, Nos. 2, 3, 4 (Feb., Mar., Apr., 1931), New York, pp. 134-137, 242-244, 348-351, ills., tabls.

McDonnell airplane. See Soule, Hartley Akin.: The effect of slots and flaps on the lift and drag of the McDonnell airplane as determined in flight.

McDonough, John. Airmanship; a complete guide and flying course for student pilots including the operation of aircraft in the field, on wheels, skis and floats.

London, New York, Sir I. Pitman & Sons, ltd., 1931, pp. xiii, 108, ills.

McGirr, Mildred Patterson. Bank travel bureaus and air transport. Nat. Aer. Mag.. Vol. 9, No. 12 (Dec. 1931), Washington, pp. 23-26.

McGrane, Lawrence H. Eyes—How to correct them.

Western Flying, Vol. 9, No. 1 (Jan. 1931), Los Angeles, Cal., pp. 32-34, ills.

MacGregor, John D. Development of Inter-American air transport. u.S. Air Services, Vol. 16, No. 5 (May 1931), Washintgon, p. 54.

McGuinness, E. A. The airplane simply explained: for junior pupils of aircraft training schools.

London, Sir Isaac Pitman & Sons., pp. 65, ills.

Machine guns. See Great Britain: Increased armament for British military aeroplanes.

Mackall, K. W. U.S. aerodrome lighting. Details and characteristics of the various types of aerodrome lights in current use.

Aircraft Engineering Vol. 3, No. 33 (Nov. 1931), London, pp. 285-290, ills., diagrs., tabls.

MacKenzie, Robert J. The regulation of aerial common carriers. Aero Digest, Vol. 19, No. 5 (Nov. 1931), New York, pp. 27,100.

McLean, Sir Robert. Has Schneider racing been worth while. Aeroplane, Vol. 41, No. 13 (Sept. 23,1931), London, pp. 782-784, ill.

McNair, Malcolm Perrine. See Gragg, Charles Insco, and Malcolm Perrine McNair: Cases on marketing airplanes.

MacPherson, Harrt E. Society. A market for airplanes.

Western Flying, Vol. 9, No. 6 (June 1931), Los Angeles, Cal., p. 45, ill.

Macready, John R. Way way up!

Western Flying, Vol. 9, No. 3 (March 1931), Las Angeles, Cal., pp. 35, 93.

MacSweeney, E. F. Civil aviation in the Irish Free State. Aeroplane, Vol. 41, No. 7 (Aug. 1931), London, pp. 441-442.

Maddelena, U. Lotte e vittorie sul mare e nel cielo. Rome, 1931.

Magaldi, G. I progressi délia sicurezza aerea e il récente Congresso di Parigi. l'Aerotecnica, Vol. 11, N. 6-7 (giug-lugl. 1931), Roma, pp. 730-740. English abstract p. 893.

Magnan, A., et A. Sainte-Lague. Aérodynamique.—Sur la distribution des vitesses aérodynamiques autour d'un avion en vol.

C. R. Acad. Sei., T. 192, No. 13 (30 mars 1931), Paris, pp. 795-797, ill.

Magnesium. See Archbutt, S. L., and J. W. Jenkin: Mechanical properties of pure magnesium and certain magnesium alloys in the wrought condition— (continued).

- See Harvey, H. G.: Magnesium and its alloys in aircraft.

--See Sutton, H., and L. F. Le Brocq: The protection of magnesium

alloys against corrosion.

Magoun, Frederick Alexander, and Eric Hodgins. A history of aircraft.

New York and London, Whittlesey House, McGrow-Hill Book Company, inc., 1931, pp. xx, 495, ills.

Maguire, Charles Joseph. Aerology; a ground school manual in aeronautical meteorology.

New York and London, McGraw-Hill Book Company, 1931, pp. xii, 136, ills., maps, diagrs.

Mahachek, Ross. Flying.

London, Putnam, 1931.

Mahs, Frhr. von. See Ronde, Hans, und Frhr. von Mahs: Der Luftschutz, von Hans Ronde, Der Kollektivschutz der Bevöekerung gegen Luftangriffe und die Sicherung lebenswichtiger Betriebe, von Frhr. von Mahs.

Maidens, A. L. See Irving, H. B., A. S. Batson, and A. L. Maidens: Rolling and sideslip experiments on a model slotted biplane of R. A. F. 31 section.

Maidment, C. C. Servicing the exported engine.

Airway Age, Vol. 12, No. 10 (Jun. 6,1931), New York, pp. 591-592, ills.

Mail. $15,000,000 re-divided. What the redistribution of the air mail funds means to the contractors.

Western Flying, Vol. 9, No. 2 (Feb. 1931), Los Angeles, Calif., pp. 27-28.

Mail. Flygtekniska problem vid nattpostflygning.

Flygning, Arg. 9, N: R 3 (Mars 1931), Stockholm, pp. 53-55.

- Night flying and air mails.

Aeroplane, Vol. 40, No. 11 (March 18, 1931), London, pp. 467-468, 470, 472, 474, maps.

- Official awareness and mail-carriers—civil.

Aeroplane, Vol. 40, No. 15 (April 15,1931), London, pp. 656, 658, ills.

- On mail versus passenger transport.

Aeroplane, Vol. 41, No. 6, 7 (Aug. 5, 12, 1931), London, pp. 337-340, 393-398, ills.

- U.S. air mail and passenger transport.

Aviation, Vol. 30, No. 3 (March 1931), New York, pp. 151-156, diargrs., tabls., maps.

- See Africa: The troubles of the African mail service.

- See B., H.: La poste transatlantique et les accords internationaux deviation marchande.

- See Brown, Walter F.: Glancing back at 1930. Mail by air.

- See Courtney, Frank T.: Trans-Atlantic air mail.

- See Europe: Europeiskt nattpostflygnat.

- See Florman, Carl: Night air mails.

- See Glover, W. Irving; Contract air mail's future.

- See India: De luchtpostdienst met Indie.

- See India: De postvluchten op Indie.

- See India: Wat schort er aan den Holland-Indie luchtpostdienst?

- See Lawrance, Charles L.: Air transport. The air mail service—Its development and cost.

- See Lawrance, Charles L.: Air transport. The economic value of the air

mail system.

- See Manning, George H.: Mr. Brown sharpens his pencil and cuts air mail

rates.

-- See Montagnes, James: The Arctic air mail.

- See National Air Transport: N. A. T.-Ford wing mail compartments.

- See National Foreign Trade Council: Our air mail service with Latin

America.

- See Radcliffe, Frank: Technical features of the air mail.

- See Rocca, Carlo: Posta aerea.

- See Rocca, Carlo: Le tariffe di posta aerea e la convenienza della löro

moderazione.

- See Stephen, von: General postmeister Dr. von Stephen und die Luftfahrt.

- See United States Congress. Senate. Committee on Post Offices and

Post Roads: Establishment of air mail routes . . . Report to accompany H.R.11704.

- See United States Post Office Department: Air mail contracts.

69261—35-12

Maintenance. Conditioning floats and hulls.

Aviation, Vol. 30, No. 5 (May 1931), New York, pp. 295-298, ills.

- Field-testing altimeters and airspeed indicators.

Aviation, Vol. 30, No. 2 (Feb. 1931), New York, pp. 112-113, ills.

- Operations and maintenance on the Ludington line.

Aviation, Vol. 30, No. 1 (Jan. 1931), New York, pp. 54-55.

- Organizing airline maintenance.

Aviation, Vol. 30, No. 2 (Feb. 1931), New York, pp. 87-91, ills.

- Servicing Pratt & Whitney engines.

Aviation Engineering, Vol. 5, No. 4 (Nov. 1931), Washington, N.J., pp. 41-42, 44, 46, 48a ills.

- See Boedecker, Kenneth J.: Engine servicing and service organizations.

- See Boedecker, Kenneth J.: Overhaul of Wright aircraft engines.

- See Caldwell, Frank W.: Care of the detachable-blade, metal propeller.

- See Collins, Paul F.: Some points for economic operation.

- See Downey, H. C: How maintenance costs were lowered.

- See Froesch, Charles: Servicing for operators.

- See Harris, Luther: Airline maintenance.

- See Harris, Luther: Keeping track of the maintenance dollar.

- See Johnsqn, J. B.: Fatigue of aircraft parts.

- See Kramer, George N.: Repairing and service for airplanes.

- See Marsh, W. Lockwood: The care and maintenance of aircraft; a complete course of instruction for ground engineers and light aeroplane owners contributed by various authors.

- See Ross, Louis F.: Servicing shock absorber struts.

- See Seymour, L. D.: Maintenance of transport equipment.

- See Tate, George, Jr.: Servicing aircraft instruments.

- See Wines, James P.: Instrument maintenance.

Maiorca, Salvatore. Airplane landing gear.

National Advisory Committee for Aeronautics, Technical Memorandums No. 627, July 2, 1931, Washington, July 1931, pp. 23, ills., diagrs., tabls.

Maitland, C. E., and A. E. Woodward Nutt. Flight tests on the variation of the range of an aircraft with speed and height.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 521-527, diagrs'. Rep. Mem. No. 1317. (Ae. 454.) With an appendix by H. T. Tizard.

Maitland, C. E. See Jones, B. Melvill, and C. E. Maitland: Records of the lateral motions of a stalled Bristol fighter aeroplane with slots upon the upper wing tips. Experiments made in the Cambridge University Air Squadron.

- See Jones, E. T., and C. E. Maitland: Stalled flight tests of a Moth fitted

with auto control slots and interceptors.

Makhonine. L'avion Makhonine à surface variable.

L'Aérophile, 39« année, No. 9 (15 sept. 1931), Paris, p. 262, ills.

Malaparte, Curzio & Falqui. Vita di Pizzo Ferro detto ítalo Balbo.

Roma, Littorio, 1931.

Malay States. Malayen-Staaten. Verordnung.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 13-14 (4. April 1931), Berlin, p. 92.

Malvani, Pietro. La difesa aerea da terra. Roma, "Tiber", 1931-IX, pp. 187, ills.

Manly, G. Aviation from the ground up. Chicago, F. Drake & Co.

Manning, George H. Mr. Brown sharpens his pencil and cuts the air mail rates.

Western Flying, Vol. 9, No. 3 (March 1931), Los Angeles, Calif., pp. 24-25.

- What congress proposes.

Western Flying, Vol. 9, No. 1 (Jan. 1931), Los Angeles, Cal., pp. 22-23, 89.

Manning, LeRoy. Touring Europe by private plane.

Aviation, Vol. 30, No. 4 (April 1931), New York, pp. 232-235, ill., map.

Manning, W. O., and R. L. Preston. A register of civilian aircraft. London, Sir. Isaac Pitman & Sons, pp. 60.

Manometers. See Betz, Albert: Mikromanometer.

- See Noyes, Richard Woodman: An integrating manometer for use in wind

tunnel pressure distribution measurement.

- See Ower, E.: A micromanometer of high sensitivity.

Manufacturers Aircraft Association. See Patents: Patent digest; abridgments of current U.S. airplane patents.

Manzaneque Feltrer, Luis. El dominio del aire y la defensa nacional. Madrid, Agencia española de librería, 1931, pp. 271, ills. Biblioteca A. E. L. militar, T. 8. Aeronáutica, T. 1.

Mapping. See Baisley, H. K.: Aerial mapping in Central America.

- See Cochran-Patrick, C. K.: Aerial reconnaissance mapping in northern

Rhodesia.

- See Montagnes, James: Air-mapping the Canadian Northland.

- See Taylor, H. W.: Mapping Porto Rico from the sky.

- See Vest, J. R. W.: Charting Cuba's coastline from the sky.

Maps. Air mapping 13,000 square miles.

Western Flying, Vol. 9, No. 2 (Feb. 1931), Los Angeles, Cal., p. 26.

- Airway maps.

Aero Digest, Vol. 19, No. 3 (Sept. 1931) New York, p. 46.

Region covered northern Illinois, southern Wisconsin and southern Michigan.

- See Dupuy, P.: The "Kahn" system of map projection.

- See Grant, Hugh Duncan: Reading the weather map.

- See United States Department of Commerce. Aeronautics Branch: Air

navigation maps. July 1, 1931.

- See United States Department of Commerce, Aeronautics Branch: Airway map of the United States, August 1, 1931.

Maps. See United States Department of Commerce, Aeronautics Branch: Airway strip map list.

—*— See United States Department of Commerce. Aeronautics Branch: List of air navigation charts. October 15, 1929.

Marben, Rolf. Ritter der luft, Zeppelinabenteuer im weitkrieg, berichte von kriegsteilnehmern.

Hamburg, Broschek & Co., 1931, pp. 191, ills.

March, Herman William. See Trayer, George W., and H. W. March: Elastic instability of members having sections common in aircraft construction.

Marchetti. L'hélice à pas variable Marchett.

L'Aérophile, 39* année, No. 12 (15 dec. 1931), Paris, p. 371, ill.

Marcotte, E. Les moteurs à huile lourde dans l'aéronautique.

Revue des Combustibles Liquides, No. 79, suppl., Paris, pp. 29, ills.

Mardles, R. Oxidation characteristics of fuel vapours with regard to engine detonation.

Aer. Res. Comm., Rep. Mem., No. 1374 (E. 46-1. C. E. 789), November 1930, London, 1931, pp. 27, ills., diagrs., tabls.

Margoulis, W. Le prix de la stabilité longitudinale de l'avion et du "canard."

L'Aéronatique, 13me année, No. 144, Bulletin L'Aérotechnique, 9e année, No. 101 (mai 1931), Paris, pp. 169-171, diagrs.

Marie, Eugène Armand. Le Congo à six jours de Paris. Paris, Les Étincelles, 1931, pp. 242, ills., maps.

Mark I. A. See Jones, D. A.: The R. A. F. automatic observer Mark IA.

Marmonnier. See Automatic stability: Deux dispositifs de stabilisation automatique. Le dispositif de stabilité par gyroscopes Marmonnier. Les girouettes de stabilisation Constantin.

Marmonier, L. La stabilità e il comando automatico dei velivoli. Riv. Aer., Anno 7, N. 6 (giugno 1931), Roma, pp. 509-530, ills.

- La stabilité et al direction automatiques des avions.

Lyon, Bosc Frères, M. & L. Riou, 1930, pp. 30, ills.

Marolles, R. J. de. The 1930 Paris show . . . European and American practices.

Aviation, Vol. 30, No. 2 (Feb. 1931), New York, pp. 76-79, ills.

- The twelfth Paris aero show. Tendencies to design reviewed and some

of the more notable exhibits described.

Aircraft Engineering, Vol. 3, No. 23 (Jan. 1931), London, pp. 3-8, ills.

Marsh, E. T. See Gelalles, Achilles George, and E. T. Marsh: Effect of orifice length-diameter ratio on the coefficient of discharge of fuel-injection nozzles.

- See Rothrock, Addison M., and E. T. Marsh: The effect of injection-valve

opening pressure on spray-tip penetration.

- See Rothrock, Addison M., and E. T. Marsh: Penetration and duration

of fuel sprays from a pump injection system.

Marsh, W. Lockwood. The care and maintenance of aircraft; a complete course of instruction for ground engineers and light aeroplane owners contributed by various authors.

London, Airways Publications, ltd., 1931, pp. 108, ills, diagrs. 2d. edition. "This book is a reprint of a series of articles that were published in the first 15 issues of Aircraft Engineering."

Marshall, Fred F. The airplane—how and why it flies.

U.S. Air Services, Vol. 16, No. 1 (Jan. 1931), Washington, pp. 42-44.

Martelloni, Giovanni F. Orazione non detta per il volo atlantico dell'aquile

di Roma.

Firenze, stab. tip. G. Spinelli e C, 1931, pp. 41.

Martial law. See Fixel, Rowland W.: Use of aircraft during martial law.

Martin. See Lowell, James R.: For business and pleasure, Martin uses a plane.

Martin, Eugene. Randy Starr after an air prize; or, the sky flyers in a dash down the states . . . illustrated by Howard L. Hastings. Philadelphia, Henry Alternas Company, 1931, iv, 5-212, ills. His Sky flyers series.

Martin, Glenn L. The development of aircraft manufacture.

Aviation Engineering, Vol. 5, No. 5 (Dec. 1931), Washington, N.J., pp. 28-35, ills. Journ. Roy. Aer. Soc, Vol. 35, No. 250 (Oct. 1931), London, pp. 894-927, ills. Wilbur Wright Memorial Lecture.

- See Wilbur Wright Memorial Lecture: The Wilbur Wright Memorial

Lecture. [Glenn L. Martin, The Development of air craft manufacturing.]

Martin, Harald. King's Cup under 10 âr.

Flygning, Ârg. 9, N:R 9 (Sept. 1931), Stockholm, pp. 170-171, 185, ills.

- Tiger moth—De Havillands senaste skapelse ett universal—ovningsplan

for militart bruk.

Flygning, Arg. 9, N:R 11 (Nov. 1931), Stockholm, pp. 218, 223, ills.

- Världens längsta luftfartslinje.

Flygning, Arg. 9, N:R 7 (Juli 1931), Stockholm, pp. 138-139, map., diagr.

Marvin, Charles F. See Miller, James Nevin: Newest aids for the "Sky . Climbers."

Marvin, Charles Frederick, Jr., and Robert D. Best. Flame movement and pressure development in an engine cylinder.

National Advisory Committee for Aeronautics, Report No. 399, Oct. 17, 1931, Washington, U.S. Government Printing Office, 1931, pp. 12, ills., diagrs., tabls.

Marvingt, Marie. L'aviation sanitaire coloniale aux derniers congrès d'aéronautique.

L'Aérophile, 39e année, No. 11 (15 nov. 1931), Paris, p. 322.

Materials. See American Society for Testing Materials: Symposium on aircraft materials.

- See Brenner, Paul: Baustoffragen bei der Konstruktion von Flugzeugen.

- See Johnson, J. B.: Progress in aircraft material development.

- See Pearson, John B.: Materials in 1930.

- See Rechtlich, Arved: Grundlagen für die Konstructive Anwendung und

Ausführung von Stahlrohrschweissungen im Flugzeugbau.

Mathias, Gotthold. Einfluss der Flügelumrissform und der Querruderabmessungen auf die Quersteuerbarkeit beim Eindecker.

Jahrbuch 1931 der Deutschen Versuchsantalt für luftfahrt, E. V., München und Berlin, 1931, pp. 712-726, diagrs.

Matricardi, Attilio. Particolari forme di impiego dell'armata aerea. Riv. Aer., Anno 7, n. 12 (die. 1931), Roma, pp. 434-451.

Mattei, Pietro. L'armata aerea a l'aviazione da bombardamento. Riv. Aer., Anno. 7, n. 6 (giugno 1931), Roma, pp. 413-423.

- L'armata aerea e l'aviazione de ricogniziöne strategica.

Riv. Aer., Anno 7, n. 12 (die. 1931), Roma, pp. 456-462.

Matthias, Joachim. Das neue Segelfluglager Borkum. Segelflieger auch über der Nordsee.

Luftschau, 4. Jahrg., Nr. 14 (24. Juli 1931), Berlin, p. 17.

Matthaes, Kurt. Statische und dynamische Festigkeitseigenschaften einiger Leichtmetalle.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt* E. V., München und Berlin, 1931, pp. 439-484, ills., diagrs., tabK

Mauboussin. The Mauboussin Mil touring airplane (French). A two-place high-wing monoplane.

National Advisory Committee for Aeronautics, Aircraft Circulars No. 145, May 22, 1931, Washington, May 1931, pp. 3, ills.

Maugeri, Franco. Note sulFimpiego del siluro.

Riv. Aer., Anno. 7, n. 2 (feb. 1931), Roma, pp. 229-239, diagrs.

Mayer, Herbert C. The changing emphasis on flight training. u.S. Air Services, Vol. 16, No. 5 (May 1931), Washington, pp. 28-29.

- The flying school and aeronautic expansion.

U.S. Air Services, Vol. 16, No. 1 (Jan. 1931), Washington, pp. 38-39.

Mayo, William B., and Anthony H. G. Fokker. Metal vs. wood. Large metal airplanes, by William B. Mayo. An answer to Mr. Mayo, by Anthony H. G. Fokker.

Western Flying, Vol. 10, No. 4 (Oct. 1931), Los Angeles, Cal., pp. 30-31, 54, ports.

Mazuir, P. Traité de télémétrie.

1931, pp. xx, 329, ills.

Mechanical testing. See Gerard, I. J.: The primary importance of mechanical testing in aircraft construction.

Mechanics. See Gernsback, Hugo, and Emanuel Stieri: Aviation mechanics.

Medicine. Aviation medicine. . . .

Army Medical Bulletin, No. 26. Carlisle Barracks, Pa., Published at the Medical Field Service School, Sept. 1931, pp. 139, ills., tabl.

- L'aviation sanitaire devant la XIVe Conférence internationale de la Croix

rouge Bruxelles 6-11 octobre 1931 par Ch. L. Julliot avec un preface de M. Etienne Riche.

Paris, Chez A. Pedone.

- See Fombeure, G.: L'altération du sens des couleurs.

- See Garsaux, Paul: Les examens médicaux et la navigation.

- See Great Britain. Air Ministry: Manual for medical officers of the

Royal Air Force . . . 2nd edition 1931.

- See Làmari, Vittorio: Sul mal degli aviatori . . .

- See United States Department of Commerce, Aeronautics Branch: Medical examiners of the aeronautics branch. June 1, 1931.

Menasco Motors, inc. Engine handbook for Menasco B-4 pirate. Los Angeles, California, Menasco Motors, 1931, pp. 92, ills.

Mendoza, Saverio Laredo de Gabriele d'Annunzio aviatore di guerra.

Milano, 1931, pp. 550.

Meopham. The Meopham accident. Technical report by the accidents investigation sub-committee of the Aeronautical Research Committee.

Flight, No. 1153, Vol. 23, No. 5 (Jan. 30, 1931), London, p. 104.

- On the Meopham accident.

Aeroplane, Vol. 40, No. 4 (Jan. 28, 1931), London, pp. 138, 140, 14?, ill.

Meredith, F. W. Air transport in fog.

Journ. Roy. Aer. Soc., Vol. 35, No. 242 (Feb. 1931), London, pp. 75-95, ills.

Merrill, Albert A. The stagger-decalage biplane.

Mech. Eng., Vol. 53, No. 5 (May 1931), New York, pp. 350-352, ills., diagrs.

Metal construction. See Fritsche, Carl B.: The metalclad airship.

- See Gabrielli, G.: Problemi moderni nella costruzione metallica degli

aeroplani.

- See Guzzoni, G., e E. Nardi: La saldatura dei materiali metallici, le sue

applicazioni nelle costruzioni aeronautiche.

- See Koppenhöf er, A.: Versuchsentwicklung im Metallgerüstbau.

- See Mayo, William B., and Anthony H. G. Fokker: Metal vs. wood.

Large metal airplanes, by William B. Mayo. An answer to Mr. Mayo, by Anthony H. G. Fokker.

- See Southern Aircraft: The metal " Martlette."

Metalclad airship. See Fritsche, Carl B.: The metalclad airship. Metallurgy. See Johnson, J. B.: Dependence of aviation on metallurgy.

- See Labò, Adelaide: La chimica metallurgica nell'industria aeronautica.

Metals. Sheet metal work for aircraft.

Flight, No. 1188, Vol. 23, No. 40 (Oct. 2, 1931), London, pp. 1000-1001, ills.

- See Archbutt, S. L., and J. W. Jenkin: Mechanical properties of pure

magnesium and certain magnesium alloys in the wrought condition— (continued)

- See Brenner, Paul: Ergebnisse von Korrosions- und Oberflächen-schutzversuchen mit Aluminium-Walzlegierungen.

- See Gambioli, Mario: Apparecchi per prove pratiche di corrosione dei

metalli.

- See Gough, H. J., and H. L. Cox: The behaviour of a single crystal of antimony subjected to alternating torsional stresses.

- See Gough, H. J., and H. L. Cox: Further experiments on the behaviour

of single crystals of zinc subjected to alternating torsional stresses.

- See Grogan, J. D., and T. H. Schofield: Report on some properties of alloys

of aluminium with thorium and silicon.

- See Horn, Hans A. und Karl Tewes: Die Schweissung von JSlektronmetall

im Flugzeugbau.

- See Jenkin, C. F., and G. D. Lehmann: High frequency fatigue.

Metals; See Matthaes, Kurt: Statische und dynamische Festigkeitseigenschaften einiger Leichtmetalle.

-—— " See Ridder, E. I. de: The use of elektron metal in airplane construction.

- See Schmidt, Erich K. O.: Seewasserbeständigkeit galvanischer Uberzüge

auf Eisen und Leichtmetallen.

- See Schraivogel, K.: Einfluss der Probestabform auf Zugfestigkeit und

Bruchdehnung von dünnen Leichtmetallblechen.

- See Silvestri, Armando: I metalli leggeri all'esposizione e Congresso

Internationale di Fonderia.

- See Wright, S. J.: The elasticity of pintsch crystals of tungsten.

Meteorology. Anleitung zur Ausführung meteorologischer Beobachtungen auf Flugwetterposten.

Weimar, Selbstverlag, pp. 26, ills. Herausgegeben von der Thüringischen Landeswetterwarte. Zweite Ausgabe 1930.

- Betriebsordnung für den internationalen fiugwetterdienst mit deutschen

ausführungsbestimmungen.

Berlin, Verlag Gebr. Radetzki, 1931, pp. 20.

- Meteorology and air navigation.

. Flight, No. 1159, Vol. 23, No. 11 (March 13,1931), London, p. 239.

- Physics of the earth—III, Meteorology.

Bulletin National Research Council, No. 79, Feb. 1931, Washington, 1931, pp. 289, ills., diagrs., tabls.

- See Bolla, Filippo: La frequenza del vento al suolo e a quote a Palermo.

- See Bossolasco: La Meteorologia e il volo a vela.

—— ' See Bryant, L. W.: Note on change of wind with height.

- See Cannegieter, H. G.: Het Internationale Polljaar 1932-1933.

- See Clover, Willis H.: The weather and the pilot.

- See Dobson, G. M. B.: Ozone in the upper atmosphere and its relation

to meteorology.

- See Entwistle, F.: The meteorological aspects of gliding.

- See Eredia, Filippo: Sulla meteorologia delle rotte aeree.

- See Eredia, Filippo: Sulla meteorologia radiotelegrafica.

—— See Fatuzzo, Giacomo: Su una legge periodica delle precipitazioni mensili a tripoli.

-- See Grant, Hugh Duncan: Reading the weather map.

- See Hildebrandt: Meteorologische Forschung für den Luftverkehr in

Innerasien..

- See Italy: I principali tipi isobarici interessanti l'Italia.

—— See Küssner, Hans Georg: Beanspruchung von Flugzeugflügeln durch Böen.

- See. Lange, K. O,: Ergebnisse von Messungen vertikaler Windgeschwindigkeiten in der Atmosphäre.

Meteorology. See Little, Delbert M.: Some effects of California mountain barriers on upper air winds and sea-level isobars.

- See Lyon, Darwin O.: Il razzo nella meteorologia e nella scienza.

- See McAdie, Alexander: Airgraphics.

- See McAdie, Alexander, and E. Gold: Meteorological conditions during

the air raid on London, Oct. 19-20, 1917.

- See Maguire, Charles Joseph: Aerology; a ground school manual in aeronautical meteorology.

- See Miller, James Nevin: Newest aids for the "Sky Climbers."

- See Montanari, D.: Sulla determinazione di correnti verticali per mezzo

di paloni piloti.

- See Musella, Francesco: Anemometrografo Fascianelli modello 1930.

- See Musella, Francesco: Sul regime anemologico a quote a napoli. (Frequenza.—Vento prevalente.—Vento medio.—Tendenza.)

- See Palumbo, L.: Meteorologia e navigazione aerea.

- See Potter, Leslie S.: The navigation of the air and meteorology.

- See Rhode, Richard V., and Eugene E. Lundquist: Applied load factors in

bumpy air. A preliminary study in the light of the meteorological data at present available.

- See Selga, Miguel: The velocity of the wind at Manila, Baguio, Iloilo

and Cebu.

- See Shaw, Sir Napier: Manual of meteorology: Vol. IV: Meteorological

calculus: Pressure and wind.

- See Sherlock, R. H., and M. B. Stout: An anemometer for a study of

wind gusts.

- See United States Department of Agriculture. Weather Bureau: Tables

for computing horizontal distance of pilot balloons. Aerological Division.

- See Van Orman, Ward T.: A preliminary meteorological survey for airship

bases on the middle atlantic seaboard.

- See Weather vane: Een neiuwe windwijzer voor het nachtluchtverkeer.

- See Yancey, Lewis A.: Aerial navigation and meteorology.

Mettam, H. A. Meccanica semplice del volo circolare.

Eiv. Aer., Anno 7, N. 7 (luglio 1931), Roma, pp. 102-105, ill., diagr.

- Performance requirements for airworthiness in Great Britain and the

U.S.A.

Aeronautical Engineering, suppl. to the Aeroplane, Vol. 40, No. 12 (March 25,1931), London, pp. 519-520, 522, 524, diagrs.

- Simple mechanics of circling flight.

Aeronautical Engineering, supplement to the Aeroplane, Vol. 40, No. 17 (April 29, 1931), London, pp. 783-784, ill., diagr., tabi.

Meunier, Èmile Marie. Une nouvelle voie à l'avenir de l'aviation . . . ouvrage posthume de Èmile-Marie Meunier.

Paris, Les Presses TJniversitaires de France, 1931, pp. xxxi, 223, diagrs.

Mexico. Mexiko. Gesetz. Mexikanisches Luft Verkehrsgesetz vom 31. Dezember 1929.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 51 (19. Dez. 1931), Berlin, pp. 366-368.

- See Cooper, Mabel C: The airlines of Mexico.

- See Cooper, Mabel C: Airports of Mexico.

Meyer, Alex. Das Neutralitätsrecht im Luftkriege. Berlin, Carl Heymanns Verlag, 1931, pp. 105.

Meyer, Louis A. Simplified engineering and its application.

National Glider and Airplane News, Vol. 3, No. 2 (Sept. 1931), New York, pp. 25-26, ills., diagr.

Meyer, Willy. Der Kampf um Nobile.

Berlin, Verlag Gebrüder Radetzki, 1931, pp. 360.

- Luftreiseführer für Mitteleuropa.

Leipzig, Verlag Bibliographisches Institut A.G., 1931, pp. 556.

- Verkehrsflieger berichten.

Berlin, Verlag Richard Carl Schmidt & Co., 1931, pp. 120, ills.

Meyers. Meyers Luftreisebücher. Mitteleuropa. Primera gina para viajes aéreos. Publicada en cooperación con la Luft Hansa, a.g. Leipzig, Bibliographisches Institut a.g., 1931, pp. 556, maps.

Michael, Franz. Experiments with airplane brakes.

National Advisory Committee for Aeronautics, Technical Memorandums No. 636, Sept. 3, 1931, Washington, September 1931, pp. 28, ills., diagrs., tabls.

- Versuche mit Flugzeugbremsen.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 10.11. Heft (28. Mai 15. Juni 1931), München und Berlin, pp. 302-312, 338-344, ills., diagrs., tabls.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 125-141, ills., diagrs., tabls.

Michigan. Laws relating to aeronautics. Compiled under the supervision of Frank D. Fitzgerald, Secretary of State, By authority 1931.

Lansing, 1931, pp. 24.

- See Evans, Floyd E.: The Michigan Board of Aeronautics.

- See Fairbanks, Rollin J.: An American windtunnel. A description, with

a historical introduction of the 8-ft. tunnel at the University of Michigan.

Micromanometer. See Ower, E.: A micromanometer of high sensitivity.

Mielnikowa, Boleslawa. Charakterystyka smarów lotniczych.

Instytut Badañ Technicznych Lotnictwa, Sprawozdanie kwartalne Nr. 5, (Nr. 24), War-szawa, 1931, pp. 79-85, diagrs., tabls.

Milch, Erhard. See Deutsche Luft Hansa a.g.: Mitteleuropa, unter mitwirkung der Deutschen Luft Hansa a.g., mit einem geleitwort von Erhard Milch.

Military aeronautics. On the Army and the Air Force.

Aeroplane, Vol. 40, No. 2 (Jan. 14, 1931), London, pp. 49-50, 52, 54, 56, ills.

- Two new military aircraft.

Flight, No. 1190,1191, Vol. 23, No. 42, 43 (Oct. 16, 23, 1931), London, pp. 1033-1036, 1057-1061, ills.

- See Air Corps: The Air Corps' mass migration.

- See Air Corps: Plans for the Air Corps maneuvers.

Military aeronautics. See Birnn, Roland: Such was the 1st provisional air division.

- See Boone, Andrew R.: What the Air Corps learned.

- See Cantoni, Alberto: L'aviazione civile e la difesa nazionale.

- See Davison, F. Trubee: The Air Corps.

- See Fairey, M. C. R.: Considerations sur avions de records et avions

militaires.

- See Faure, Pierre: Vers un nouveau Charleroi (la guerre aérienne de

demain).

- See Fucini, Mario: Alcuni aspetti del problema degli armamenti aerei.

- See Genzini, Carlo: L'aeroplano da caccia offensiva.

- See Giannini, Amedeo: Gli aeromobili militari.

- See Great Britain: Anti-aircraft gun and instrument drills (mobile and

semi-mobile) 1931. The War Office.

- See Great Britain: Increased armament for military aeroplanes.

- See Great Britain: Instructions for practice, anti-aircraft artillery. 1931

. . . The War Office, 28th February, 1931.

- See Guerritore, Carlo: Alcune predisposizioni ed alcune norme da osservarsi per l'occultamento all'indagine ed alla offesa aerea dell'organizzazione e dell funzionamento logistico di un'armata in linea.

- See Guerritore, Carlo: L'aviazione ausiliaria per il R. Esercito.

- See Hegener, Henri: Uit de eerste jaren der militaire luchtvaart.

- See Howard, Clinton W.: Development of military airplanes.

- See Italy: Rome to Rio in formation.

- See Lawrence, Charles L.: Commercial aviation—Its relation to national

defense.

- See Lawrence, Charles L.: Linking aircraft problems to Navy treaty

strength.

- See Manzaneaue Feltrer, Luis: El dominio del aire y la defensa nacional.

- See Matricardi, Attilio: Particolari forme di impiego dell'armata aerea.

- See Mattei Pietro: L'armata aerea a l'aviazione da bombardamento.

- See Mattei, Pietro: L'armata aerea e l'aviazione de ricognizione strategica.

- See Moffett, W. A.: The Progress of Naval Aviation.

- See Nistri, Umberto: Un metodo per l'addestramento del bombardiere e

per il controllo sperimentale del tiro dall'alto.

- See Ord., J. Garesché: Cooperative training for air and ground troops.

- See Pynches, T. le G.: Aircraft armaments.

- See Ritter, Hans: Post-war fighter progress.

- See Robertson, F. A. de V.: The air exercises.

Military aeronautics. See Robertson, F. A. de V.: No. 101 (Bomber) squadron.

- See Rowell, Ross E.: Expeditionary movements of aircraft.

- See Russell, Frank H.: The design and production of militay aircraft.

- See Sarfatti, Gualtiero: Principi fondamentali della condotta della guerra

aerea.

- See Sbernadori, Paolo: An aerial navy goes to sea.

- See Snowden Gamble, Charles Ferderick: The air weapon, being some

account of the growth of British military aeronautics from the beginnings in the year 1783 until the end of the year 1929.

- See Stewart, Oliver: Single or twin-engined day bombers.

- See Studley, Barrett: Learning to fly for the Navy.

- See United States: The American naval airships.

- See United States Department of the Navy: Flight manual. Training

seaplanes.

- See Voss: Militärflugzeuge von heute.

- See Webb, L. D.: The flying fleet heads south.

- See Wells, G. M.: Development of anti-aircraft matériel.

Miller, Howell W. Determining the horsepower.

Airway Age, Vol. 12, No. 4 (Apr. 1931), New York, pp. 352-353, diagrs.

Miller, Ivan W. The aircraft mechanics' handbook.

New York and London, McGraw-Hill Book Company, inc., 1931, pp. vii, 174, ills.

Miller, James Nevin. Newest aids for the "Sky Climbers."

The Sunday Star (Magazine), Oct. 26, 1930, Washington, p. 10, ill., port.

Miller, J. W. Has the airplane a future? A challenge to the aviation industry. Western Flying, Vol. 10, No. 1 (July 1931), Los Angeles, Calif., pp. 21-25, ills.

Miller, Marvel P., and Hartley A. Soulé. Moments of inertia of several airplanes.

National Advisory Committee for Aeronautics, Technical Notes No. 375, May 5,1931, Washington, May 1931, pp. 6, diagr., tabls.

Miller, O. M. Planetabling from the air.

Geographical Review, Vol. 21,1931, New York, pp. 201-212.

Miller, Paul A. Airplane landings in gusty surface winds.

Monthly Weather Review, Vol. 59, No. 1 (Jan. 1931), Washington, pp. 33-34.

Miller, Roy A. A solution of the circular ring.

Airway Age, Vol. 12, No. 5 (May 2,1931), New York, pp. 465-468, ills.

Mills, P. W. F. Angles on practical flying.

London, C. Lockwood and son, 1931, pp. xi, 75, ills.

Minelli, Carlo. Le ali dei velivoli e le loro strutture.

L'Aerotecnica, Vol. 11, N. 9 (sett. 1931), Roma, pp. 1091-1118, ills. Abstract in English, p. 1169.

- Moderni problemi sulle strutture aeronautiche.

Riv. Aer., Anno 7, N. 5 (mag. 1931), Roma, pp. 253-259.

Minelli, Carlo. Sull'equilibrio longitudinale del velivolo ad ala deformabile.

L'Aerotecnica, Vol. 11, N. 5 (mag. 1931), Roma, pp. 507-532, diagrs. English abstract, pp. 692-693.

Minneapolis. See Lindbergh, H. A.: Minneapolis municipal airport.

Mirgtjet, H. À propos d'essais en vol.

L'Aérophile, 39e année, No. 7 (15 juil. 1931), Paris, p. 197.

Mises, R. von. See Lamb, H.: Lehrbuch der Hydrodynamik.

MiszTAL, Franciszek. Doéwiadczalne sprawdzenie teorji belek prostych o przekrojach wiotkich.

Instytut Badan Technicznych Lotnictwa, Sprawozdanie kwartalne Nr. 5 (Nr. 21),Warszawa, 1931, pp. 23-28, ills., diagrs.

Mitchell, R. J. Essais de maquettes d'hydravions au bassin des carènes.

L'Aéronautique, 13 me année, No. 142, L'Aérotechnique, 9e année, No. 99 (mars. 1931), Paris, pp. 96-98, diagrs.

Mitteleuropa. See Deutsche Luft Hansa A. G.: Mitteleuropa, unter mitwirkung der Detuschen Luft Hansa A. G.

Mock, Richard M. Heinkel plane on the S. S. Europa.

Aero Digest, Vol. 18, No. 1 (Jan. 1931), New York, p. 74.

Mockler, Don. Frank Goldsborough.

U.S. Air Services, Vol. 16, No. 6 (June 1931), Washington, p. 33.

- The National Air Races for 1931.

U.S. Air Services, Vol. 16, No. 10 (Oct. 1931), Washington, pp. 13-16, ills.

- What price airports? The pro and con of the landing fee situation and a

suggested compromise.

U.S. Air Services, Vol. 16, No. 12 (Dec. 1931), Washington, D.C., pp. 39-40.

Models. Concorso nazionale per modelli volanti.

Riv. Aer., Anno 7, n. 8 (agosto 1931), Roma, pp. 339-351.

- See Camm, F. J.: Model aeroplanes and airships, with special chapters on

gliders, helicopters, wing-flapping models, kites, and full-size gliding.

- See Claudy, Carl Harry: Prize winners' book of model airplanes.

- See Fraser, Chelsea Curtis: The model aircraft builder.

- See Heibig, Hans: Das Jungfliegertreffen und der Mo dell Wettbewerb für

Segelflugmodelle Pfingsten 1931 auf der Wasserkuppe.

- See Ott, Joseph S.: Model airplanes; building and flying.

- See Winkler, Horst: Das hochleistungs- Segelflugmodell, im auftrage des

Jugendausschusses des Deutschen Luftfahrt-Verbandes e.v.

Möller, W. Der flugmotor. Teil III, Moderne Flugmotoren. Charlottenburg, Verlag C. J. E. Volkmann, 1931, pp. 89, ills. Heft 9 der Sammlung: Plugzeugbau und Luftfahrt.

Moffett, William A. Aviation has become an indispensable part of the fleet. U.S. Air Services, Vol. 16, No. 2 (Feb. 1931), Washington, pp. 43-44.

- Five progressive years in naval aviation.

Aero Digest, Vol. 18, No. 3 (March 1931), New York, pp. 35-37,124-128, ills.

- Glancing back at 1930. Naval aviation.

Western Flying, Vol. 9, No. 1 (Jan. 1931), Los Angeles, Cal., pp. 39.

Moffet, William A. The Progress of Naval Aviation.

Airway Age, Vol. 12, No. 1 (Jan. 1931), New York, pp. 52-55, ills.

- The Schneider Seaplane Trophy—symbol of speed supremacy in the air.

Nat. Aen Mag., Vol. 9, No. 3 (March 1931), Washington, pp. 45-48, ills.

Möhr, Adrian. 33 Jahre verschollen im packeis. Leipzig, Verlag Qretlein & Co.

Moisil, Gr. C. Sur le mouvement d'un fil sur une surface. Mathematica, Vol. 3, 1930, Cluj, pp. 144-150.

Mokrzycki, Gustaw Andrezj. Aviation.—Détermination du combustible nécessaire pour atteindre le plafond pratique.

C. R. Acad. Sci., T. 192, No. 16 (20 avril 1931), Paris, pp. 925-926.

- Pewne zagadnienie lotu na wysokoâc.

Instytut Badan Technicznych Lotnictwa, Sprawozdanie kwartalne Nr. 2, Warszawa, 1930, pp. 5-7.

■—— Pomiar spólczynników wyczynów.

Instytut Badan Technicznych Lotnictwa, Sprawozdanie kwartalne, Nr. 4, Warszawa, 1930, pp. 20-22.

- Rozbieg startuj^cych samolotów.

Instytut Badan Technicznych Lotnictwa, Sprawozdanie kwartalne, Nr. 3, Warszawa, 1930, pp. 26-30, ill.

- Sur les plus grandes distances franchissables en avion.

L'Aérophile, 39e année, No. 2 (15 fév. 1931), Paris, pp. 50-51, diagrs.

Molcanov Aerologija.

1931.

Moleyns, A. F. de. Round Britain in the "Graf Zeppelin."

Aeroplane, Vol. 41, No. 12 (Sept. 16, 1931), London, pp. 726-726b, ills.

Moltschanoff, P. Polarfahrt im Nebel. Wolkenstudien während der Polarfahrt des Luftschiffs "Graf Zeppelin."

Die Umschau, 35. Jahrg., Heft 36 (5. Sept. 1931), Frankfurt a.M., pp. 714-715, ill.

Monish, Byron Harold. Effect of variation of chord and span of ailerons on hinge moments at several angles of pitch.

National Advisory Committee for Aeronautics, Report No. 370, March 6,1931, Washington, U.S. Government Printing Office, 1930, [1931], pp. 15, ills., diagrs., tabls.

Mono-spar. The first mono-spar monoplane.

Aeroplane, Vol. 41, No. 2 (July 8, 1931), London, pp. 122-126, ills.

—î— An interesting experiment.

Flight, No. 1176, Vol. 23, No. 28 (July 10,1931), London, pp. 667-670, ills.

- The mono-spar Fokker.

Aeroplane, Vol. 41, No. 25 (Dec. 16,1931), London, p. 1375, ills.

- The Mono-Spar light airplane (British). A twin-engined low-wing cabin

monoplane.

National Advisory Committee for Aeronautics, Aircraft Circulars No. 148, July 28, 1931, Washington, July 1931, pp. 7, ills.

- The Monospar wing flies.

Flight, No. 1199, Vol. 23, No. 51 (Dec. 18, 1931), London, p. 1234, ills.

- Monospar wing for Fokker F. VII-3M.

Flight, No. 1173, 1177, Vol. 23, No. 25, 29 (June 19, July 17,1931), London, p. 550,693-696, ills.

Montagnes, James. Air-mapping the Canadian Northland.

U.S. Air Services, Vol. 16, No. 8 (Aug. 1931), Washington, pp. 40-41.

Montagnes, James. The Arctic air mail.

U.S. Air Services, Vol. 16, No. 12 (Dec. 1931), Washington, D.C., p. 25.

- Canada's aviation industry.

Western Flying, Vol. 10, No. 1 (July 1931), Los Angeles, Cai., p. 25.

- Largest short-wave operator in Canada.

U.S. Air Services, Vol. 16, No. 10 (Oct. 1931), Washington, pp. 29-30.

- Patrol operation.

Airway Age, Vol. 13, No. 10 (Sept. 5, 1931), New York, pp. 202-204.

- Plane parking in the Arctic.

Western Flying, Vol. 10, No. 6 (Dec. 1931), Los Angeles, Cai., pp. 28-29, ill.

- Transport fish by airplane.

U.S. Air Services, Vol. 16, No. 11 (Nov. 1931), Washington, D.C., p. 42.

Montanari, D. Contributo allo studio del regime anemologico a Venezia.

L'Aerotecnica, Vol. 11, n. 6-7 (giug.-lugl. 1931), Roma, pp. 741-759, diagrs., tabls. English abstract, pp. 894-895.

- Sulla determinazione di correnti verticali per mezzo di palloni piloti.

L'Aerotecnica, Voi. 11, n. 3 (marzo 1931), Roma, pp. 318-325, diagrs. English abstract, p. 391.

Montelucci, G. La detonazione nei motori a scoppio.

L'Aerotecnica, Voi. 11, No. 6-7 (giug-lugl. 1931), Roma, pp. 781-788.

Moodie, Edmund L. Reaching a private market with flying clubs. Aviation, Vol. 30, No. 8 (Aug. 1931), New York, pp. 470-472.

Moore, C. S. See Spanogle, J. A., and C. S. Moore: Performance of a compression-ignition engine with precombustion chamber having high-velocity air flow.

Mooring. See Pitman, Ernest: A docking device for airships.

Mooring mast. See Pickett, Charles: The Empire State building mooring mast.

Moraczewska, Marja. Doczulanie emulsyj krajowych na czerwien i podczer-wien. (Sensibilisation des emulsions du pays pour le rouge et l'infrarouge). Instytut Badaii Technicznych Lotnictwa, Sprawozdanie, Bulletin No. 7 (Nr. 38), Warszawa, 1931, pp. 79-84, ills., tabls.

Moraczewska, Marja, i Wlodzimierz Daniewski. O oéwietleniu ciemni foto-graficznej. (De Téclairage de la schambre obscure photographique.)

Instytut Bada nTachnicznych Lotnictwa, Sprawozdanie, Bulletin No. 6 (Nr. 30), Warszawa, 1931, pp. 93-96.

Morazzoni, Giuseppe. Un pioniere dell'aeronautica, Vincenzo Lunardi; documenti inediti e saggio iconografico, raccolti da G. Morazzoni. Milano, Antiquariato W. Toscanini, 1931, pp. 157, ills.

Morelli, Ercole. L'aeronautica italiana nella battaglia di Vittorio Veneto (24 ottobre-4 novembre 1918).

Riv. Aer., Anno 7, N. 10 (ott. 1931), Roma, pp. 106-124.

Mortane, Jacques. Leur dernier vol. Paris, Baudinière, 1931, pp. 250.

Moss, H. See King, R. O., and H. Moss: Detonation and lubricating oil.

- See King, R. O., and H. Moss: Detonation, mineral lubricating oils and

blended fuels.

Moss, H. * See King, R. O., and H. Moss: Detonation, spark-plug position, and engine speed.

Moth. The new "Tiger Moth."

Flight, No. 1194, Vol. 23, No. 46 (Nov. 13,1931), London, pp. 1121-1124, ills.

- Moth trainer.

Flight, No. 1175, Vol. 23, No. 27 (July 3,1931), London, pp. 649-651, ills.

- See Great Britain. Air Ministry: The Moth two-seater light aeroplane.

Gipsy Mark I engine.

- See Jones, E. T., and C. E. Maitland: Stalled flight tests of a Moth fitted

with auto control slots and interceptors.

Mounier, P. J. J. De Amerikaansche vliegbalans over 1930.

Het Vliegveld, 15de Jaarg., No. 5 (Mei 1931), Amsterdam, pp. 159-160.

- Igor Sikorsky en zijn amphibievliegtuigen.

Het Vliegveld, 15de Jaarg., No. 1 (Jan. 1931), Amsterdam, pp. 25-28, ills.

- Mistbestrijding.

Het Vliegveld, 15de Jaarg., No. 8 (Aug. 1931), Amsterdam, p. 274, ills.

- Vliegende windmolens.

Het Vliegveld, 15de Jaarg., No. 10 (Oct. 1931), Amsterdam, pp. 350-354, ills.

Mount Batten. On the accident at Mount Batten.

Aeroplane, Vol. 40, No. 8 (Fed. 25, 1931), London, pp. 309-310.

Mountains. See Pinna, Pietro: L'aviazione in montagna.

Moynaham, George B. Methods of testing welds. Survey of methods available for determining ability of welders and quality of welded products. Metals & Alloys, Vol. 1, No. 13 (July 1930), New York, pp. 607-612, ill.

Mueller, H., und H. Peters. Geschwindigkeits- und Mengenmessungen von Flüssigkeiten.

Wien, W., und F. Harms: Handbuch der Experimentalphysik, Bd. 4,1. Teil. Hydro- und aerodynamik, Leipzig, Akademische Verlagsgesseilschaft m.b.H., 1931, pp. 553-634, ills.

Muir, N. S. See Carter, B. C, and N. S. Muir: Torsional vibration of crankshafts. Beardmore "Tornado" airship engine investigations.

Muir, N. S., and A. Terry. A harmonic analysis of the torque curves of a single cylinder electric ignition engine when throttled to various mean indicated pressures, with an appendix on the estimation of forcing torques in multi-cylinder engines.

Aer. Res. Comm., Rep. Mem., No. 1305, (E. 41), March 1930, London, 1931, pp. 14, diagrs., tabls.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 1104-1117, diagra., tabls.

Muller, Charles G. Business speaks up about flying.

Nat. Aer. Mag., Vol. 9, No. 11 (Nov. 1931), Washington, pp. 23-25, ills.

- Uses of aircraft in industry.

Nat. Aer. Mag., Vol. 9, No. 6 (June 1931), Washington, pp. 25-29, ills.

Mumey, Nolie. Evolution of flight; stories based on legendary and historical data.

Denver, The Kendrick-Bellamy Co., 1931, pp. xiii, 123, ills.

- See Chase, John Samson, and Nolie Mumey: Physical requirements for

commercial flyers.

Münk, Max Michael. The aspect ratio. Article thirteen on the principles of aerodynamics.

Aero Digest, Vol. 19, No. 1 (July 1931), New York, pp. 49, 131.

- The center of pressure. Article eight on the principles of aerodynamics.

Aero Digest, Vol. 18, No. 2 (Feb. 1931), New York, pp. 54-55, 122, ills.

- The choice of a wing section. Article fifteen on the principles of aerodynamics.

Aero Digest, Vol. 19, No. 3 (Sept. 1931), New York, pp. 47, 116, diagr.

- The composite wing air flow.

Aero Digest, Vol. 18, No. 6 (June 1931), New York, pp. 54-55, 81, ill.

- The creation of lift by a wing section.

Aero Digest, Vol. 18, No. 1 (Jan. 1931), New York, pp. 56, 142, diagrs.

- The distribution of lift. Dr. Max M. Munk's seventeenth article on the

principles of aerodynamics.

Aero Digest, Vol. 19, No. 5 (Nov. 1931), New York, pp. 32, 97, diagr.

- The induced drag.

Aero Digest, Vol. 18, No. 5 (May 1931), New York, pp. 60-61.

- The "M" wing sections. Article ten on the principles of aerodynamics.

Aero Digest, Vol. 18, No. 4 (April 1931), New York, pp. 56-57, ills.

- Mathematical wing sections. Dr. Max M. Munk's ninth article on the

principles of aerodynamics.

Aero Digest, Vol. 18, No. 3 (March 1931), New York, pp. 51, 122-124, diagr.

- Means for increasing the lift. Dr. Max M. Munk's eighteenth article on

the principles of aerodynamics.

Aero Digest, Vol. 19, No. 6 (Dec. 1931), New York, pp. 39, 97-98, ills.

- The measured lift of airfoils. Dr. Max M. Munk's sixteenth article on the

principles of aerodynamics.

Aero Digest, Vol. 19, No. 4 (Oct. 1931), New York, pp. 46-47, 114-115, diagrs.

- Plotting wing characteristics. Article fourteen on the principles of aerodynamics.

Aero Digest, Vol. 19, No. 2 (Aug. 1931), New York, pp. 45, 54-56, diagrs.

Munro, William. Hull design of flying boats.

Aircraft Engineer, Flight Engineering Section, Suppl. to No. 1170, Vol. 23, No. 22 (May 29, 1931), London, pp. 478a-478d (33-36), diagrs., tabl.

Mtjreatjx. The Mureaux 111 R. 2 military airplane (French). A long-distance all-metal observation monoplane.

National Advisory Committee for Aeronautics, Aircraft Circulars No. 142, April 25, 1931, Washington, April 1931, pp. 6, ills.

Murphy, Pat. Grandstand observations at the air races.

Aero Digest, Vol. 19, No. 4 (Oct. 1931), New York, pp. 36-37.

Murphy, Paul. Armadas of the sky; the problem of armaments . . . foreword by Sir Max Pemberton, preface by Major-General Nealson G. Anderson. . . .

London, The Houghton Publishing Co., 1931, p. 120.

Murray, R. Stuart. From hangar to boulevard.

Aviation, Vol. 30, No. 2 (Feb. 1931), New York, pp. 92-93.

Musella, Francesco. Anemometrografo Fascianelli modello 1930.

Riv. Aer., Anno 7, N. 5 (mag. 1931), Roma, pp. 260-278, ills., diagr. 69261—35-13

Musella, Francesco. Disciplina delle radiocomunicazioni nella navigazione aerea.

Riv. Aer., Anno 7, N. 3 (marzo 1931), Roma, pp. 472-482, map.

- La radiogoniometria nella navigazione aerea.

Riv. Aer., Anno 7, N. 8 (agosto 1931), Roma, pp. 259-280, diagrs.

- Rete radiotelegrafica terrestre per la navigazione aerea.

Riv. Aer., Anno 7, N. 4 (aprile 1931), Roma, pp. 90-99, map.

- Sul regime anemologico a quote a napoli. (Frequenza.—Vento prevalente.—Vento medio.—Tendenza).

Riv. Aer., Anno 7, N. 12 (die. 1931), Roma, pp. 514-537, diagrs., tabls.

Mutchler, W. H. See Buzzard, R. W., and W. H. Mutchler: Advantages of oxide films as bases for aluminum pigmented surface coating for aluminum alloys.

Muttray, Ii. Widerstand und Kühl Wirkung eines Flugzeugrumpfes mit verschieden angeordnetem Kühler.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 3. Heft (14. Feb. 1931), München und Berlin, pp. 65-71, ills., diagrs.

Muzii, Vittorino. Cenni di meccanica, aerologia e topografia. Corso allievi piloti anno 1931.

Roma, tip. lit. A. Sampaolesi, 1931, pp. 83.

Mystery, S. See Raffaelli, Italo: L'autonomia del Mystery S."

Mystery ship. The "Mystery ship" revealed. The fastest commercial plane yet flown, it has outperformed the best planes of the Army and Navy. Scient. Amer., Vol. 144, No. 2 (Feb. 1931), New York, pp. 96-98, ills.

N

Nacelle. See Ower, E., and C. T. Button: Interference of a streamline nacelle on a monoplane wing.

Nagal, Tenji. See Alloys: Über die Herstellung und die mechanischen Eigenschaften der Al-Cu-Si Legierungen.

Nakanishi, Fujio. On the yield point of mild steel.

Report of the Aeronautical Research Institute, Tokyo Imperial University, No. 72 (Vol. 6, 6), (June 1931), Tokyo, pp. 83-140, ills., diagrs., tabls.

Napier. See Wilkinson, G. S.: Napier Lion series VIIB engine for 1927 Schneider Trophy.

Napier, Montague. Montague Napier.

' Aeroplane, Vol. 40, No. 4 (Jan. 28, 1931), London, p. 142.

Nardi, E. See Guzzoni, G., e E. Nardi: La corrosione dei metalli e leghe usati in aeronautica.

- See Guzzoni, G., e E. Nardi: La saldatura dei materiali metallici, le sue

applicazioni nelle costruzioni aeronautiche.

National Advisory Committee for Aeronautics. Aeronautic progress and the N.A.C.A.

Aviation, Vol. 30, No. 7 (July 1931), New York, pp. 405-407, ills.

National Advisory Committee for Aeronautics. Aeronautics. Sixteenth annual report of the National Advisory Committee for Aeronautics, 1930, including Technical Reports Nos. 337-364.

Washington, United States Government Printing Office, 1931, pp. 787, ills., diagrs., tabls. Technical Reports. No. 337. The gaseous explosive reaction at constant pressure. The reaction order and reaction rate, by F. W. Stevens, pp. 67-82. No. 338. The effect of reduction gearing on propsller-body interference as shown by full scale wind tunnel tests, by Fred E Weick, pp. 83-103. No. 339. Full scale wind tunnel tests with a series of propellers of different diameters on a single fuselage, by Fred E. Weick, pp. 105-120. No. 340. Full scale wind tunnel tests on several metal propellers having different blade forms, by Fred E. Weick, pp. 121-133. No. 341. The design and development of an automatic injection valve with an annular orifice of varying area, by William F. Joachim, Chester W. Hicks, and Hampton H. Foster, pp. 135-144. No. 342. Effect of turbulence in wind tunnel measurements, by H. L. Dryden and A. M. Kuethe, pp. 145-170. No. 343. Effect of variation of cord and span of ailerons on rolling and yawing moments at several angles of pitch, by R. H. Heald, D. H. Strother, and B. H. Monish, pp. 171-199. No. 344. The design of plywood webs for airplane wing beams, by George W. Trayer, pp. 201-217. No. 345. The design of airplane wing ribs, by J. A. Newlin and George W. Trayer, pp. 219-272. No. 346. Water pressure distribution on a flying boat hull, by F. L. Thompson, pp. 273-290. No. 347. A method of calculating the ultimate strength of continuous beams, by J. A. Newlin and George W. Trayer, pp. 291-318. No. 348. Strength of welded joints in tubular members for aircraft, by H. L. Whittemore and W. C. Brueggeman, pp. 319-359. No. 349. A proof of the theorem regarding the distribution of lift over the span for minimum induced drag, by W. F. Durand, pp. 361-375. No. 350. Working charts for the selection of aluminum alloy propellers of a standard form to operate with various aircraft engines and bodies, by Fred E. Weick, pp. 377-392. No. 351. Full scale wind tunnel tests of a propeller with the diameter changed by cutting off the blade tips, by Donald H. Wood, pp. 393-417. No. 352. Large-scale aerodynamic characteristics of airfoils as tested in the variable density wind tunnel, by Eastman N. Jacobs and Raymond F. Anderson, pp. 419-450. No. 353. Airfoil pressure distribution investigation in the variable density wind tunnel, by Eastman N. Jacobs, John Stack, and Robert M. Pinkerton, pp. 451-466. No. 354. Aircraft woods: Their properties, selection, and characteristics, by L. J. Markwardt, pp. 467500. No. 355. Comparative flight performance with an N.A.C.A. Roots supercharger and a turbocentrifugal supercharger, by Oscar W. Schey and Alfred W. Young, pp. 501-514. No. 356. Strength of rectangular flat plates under edge compression, by Louis Schuman and Goldie Black, pp. 515-538. No. 357. Aircraft accidents. Method of analysis, by Committee on Aircraft Accidents of the National Advisory Committee for Aeronautics, pp. 539-555. No. 358. Temperature coefficient of the modulus of rigidity of aircraft instrument diaphragm and spring materials, by W. G. Brombacher and E. R. Melton, pp. 557-572. No. 359. An investigation of the effectiveness of ignition sparks, by Melville F. Peters, Wayne L. Summerville, and Merlin Davis, pp. 573-585. No. 360. Pressure distribution over a symmetrical airfoil section with trailing edge flap, by Eastman N. Jacobs and Robert M. Pinkerton, pp. 587-605. No. 361. Experimental determination of jet boundary corrections for airfoil tests in four open wind tunnel jets of different shapes, by Montgomery Knight and Thomas A. Harris, pp. 607633. No. 362. An extended theory of thin airfoils and its application to the biplane problem, by Clark B. Millikan, pp. 635-667. No. 363. Pressure fluctuations in a common-rail fuel injection system, by A. M. Rothrock, pp. 669-684. No. 364. The pressure distribution over the wings and tail surfaces of a PW-9 pursuit airplane in flight, by Richard V. Rhode, pp. 685-787.

- Aircraft Circulars No. 132. Focke-Wulf F 19a "Ente" commercial airplane (German). A tail-first high-wing monoplane.

National Advisory Committee for Aeronautics, Jan. 23, 1931 (mimeographed), Washington, January 1931, pp. 9, ills.

- Aircraft Circulars No. 133. The Hanriot H 431 military airplane (French).

A general purpose biplane.

National Advisory Committee for Aeronautics, Jan. 31, 1931 (mimeographed), Washington, January 1931, pp. 12, ills., tabl.

- Aircraft Circulars No. 134. The Amiot 140 M military airplane (French).

An all-metal multiplace high-wing monoplane.

National Advisory Committee for Aeronautics, Feb. 13,1931 (mimeographed), Washington, February 1931, pp. 7, ills.

- Aircraft Circulars No. 135. The Dewoitine D.30 commercial airplane

(French). A high-wing cantilever monoplane.

National Advisory Committee for Aeronautics, Feb. 20,1931 (mimeographed), Washington, February 1931, pp. 8, ills.

National Advisory Committee for Aeronautics. Aircraft Circulars No. 136. Latecoere 38-0 flying boat (French). A long-range sesquiplane for carrying mail.

National Advisory Committee for Aeronautics, Feb. 27, 1931 (mimeographed), Washington, February 1931, pp. 5, ills.

- Aircraft Circulars No. 137. Polish P type single-seat fighters. All-metal Gull-type wing monoplane.

National Advisory Committee for Aeronautics, March 3,1931 (mimeographed), Washington, March 1931, pp. 10, ills.

- Aircraft Circulars No. 138. The Bleriot 110 airplane (French). Along-

distance high-wing monoplane.

National Advisory Committee for Aeronautics, March 10,1931 (mimeographed), Washington, March 1931, pp. 9, ills.

--Aircraft Circulars No. 139. The Bernard 120 seaplane (French). A

1,400 hp single-seat monoplane racer by Pierre Leglise.

National Advisory Committee for Aeronautics, March 17, 1931 (mimeographed), Washington, March 1931, pp. 5, ills.

- Aircraft Circulars No. 140. The Wibault 280 T. 10 commercial airplane

(French). An all-metal, cantilever, low-wing monoplane.

National Advisory Committee for Aeronautics, March 24, 1931 (mimeographed), Washington, March 1931, pp. 5, ills.

- Aircraft Circulars No. 141. The C.A.M.S. 60 seaplane (French). A

twin-engine bombing and torpedo monoplane.

National Advisory Committee for Aeronautics, March 31, 1931 (mimeographed), Washington, April 1931, pp. 8, ills.

- Aircraft Circulars No. 142. The Mureaux 111 R.2 military airplane

(French). A long-distance all-metal observation monoplane.

National Advisory Committee for Aeronautics, April 25,1931 (mimeographed), Washington, April 1931, pp. 6, ills.

- Aircraft Circulars No. 143. The S.P.C.A. 40 T commercial airplane

(French). An all-metal cantilever monoplane.

National Advisory Committee for Aeronautics, April 30,1931 (mimeographed), Washington, April 1931, pp. 3, ills.

--Aircraft Circulars No. 144. The "I.A.R." pursuit airplane (Roumanian).

A one-place cantilever low-wing monoplane.

National Advisory Committee for Aeronautics, May 15, 1931 (mimeographed), Washington, May 1931, pp. 3, ills.

- Aircraft Circulars No. 145. The Mauboussin M 11 touring airplane

(French). A two-place high-wing monoplane.

National Advisory Committee for Aeronautics, May 22, 1931 (mimeographed), Washington, May 1931, pp. 3, ills.

- Aircraft Circulars No. 146. The Dewoitine D 33 commercial airplane

(French). A low-wing cantilever monoplane.

National Advisory Committee for Aeronautics, June 16, 1931 (mimeographed), Washington, June 1931, pp. 9, ills.

- Aircraft Circulars No. 147. The Bernard 80 G.R. long-distance airplane

(French). A two-place cantilever monoplane.

National Advisory Committee for Aeronautics, July 11, 1931 (mimeographed), Washington, July 1931, pp. 6, ills.

- Aircraft Circulars No. 148. The Mono-Spar light airplane (British).

A twin-engined low-wing cabin monoplane.

National Advisory Committee for Aeronautics, July 28, 1931 (mimeographed), Washington, July 1931, pp. 7, ills.

National Advisory Committee for Aeronautics. Aircraft Circulars No. 149. Breguet 390 T commercial airplane (French). A ten-seat all-steel sesquiplane. National Advisory Committee for Aeronautics, Aug. 11,1931 (mimeographed), Washington, August 1931, p. 4, ills.

- Aircraft Circulars No. 150. The Avrò 627 "Mailplane" (English). A

single-seat biplane.

National Advisory Committee for Aeronautics, Aug. 31, 1931 (mimeographed), Washington, August 1931, pp. 8, ills.

- Aircraft Circulars No. 151. Breguet military airplane, Type 33. A two-place long-distance sesquiplane for observation and bombing.

National Advisory Committee for Aeronautics, Sept. 25,1931 (mimeographed), Washington, September 1931, pp. 16, ills.

- Aircraft Circulars No. 152. Potez 37R2 military airplane. A two-place

long-distance observation monoplane.

National Advisory Committee for Aeronautics, Sept. 30,1931 (mimeographed), Washington, September 1931, pp. 5, ills.

- Aircraft Circulars No. 153. The Guillemin J.G.10 (French). A two-place touring low-wing monoplane.

National Advisory Committee for Aeronautics, Nov. 12,1931 (mimeographed), Washington, November 1931, pp. 4, ills.

- Aircraft Circulars No. 154. The Supermarine S.6.3. racing seaplane

(British). A low-wing twin-float monoplane.

National Advisory Committee for Aeronautics, Dec. 30,1931 (mimeographed), Washington, December 1931, pp. 6, ills.

- America's new water tank.

Flight, No. 1200, Vol. 23, No. 52 (Dec. 25, 1931), London, p. 1270, ill.

- Bibliography of aeronautics 1929, by Paul Brockett.

Washington, United States Government Printing Office, 1930, pp. vi, 242.

- The design of injection nozzles. A summary of five N.A.C.A. reports on

systematic investigations of practical use for engineers.

Aircraft Engineering, Vol. 3, No. 33 (Nov. 1931), London, pp. 281-284, ills., diagrs.

- Les nouvelles installations de recherche du N.A.C.A.

L'Aéronautique, 13me année, No. 150 (nov. 1931), Paris, pp. 390-391, ills.

- Recente attività di recerche nel campo aeronautico.

Riv. Aer., Anno 7, N. 12 (die. 1931), Roma, pp. 580-585, ills.

- Recherches américaines sur la formation de la glace à bord des avions en

vol.

L'Aéronautique, 13me année, No. 149 (oct. 1931), Paris, pp. 367-368, ills.

- Report No. 364. The pressure distribution over the wings and tail surfaces of a PW-9 pursuit airplane in flight, by Richard V. Rhode.

National Advisory Committee for Aeronautics, Jan. 26, 1931, Washington, U.S. Government Printing Office, 1930 [1931], pp. 103, ills., diagrs., tabls.

- Report No. 365. Aerodynamic characteristics of circular-arc airfoils at

high speeds, by L. J. Briggs and H. L. Dryden.

National Advisory Committee for Aeronautics, Jan. 12,1931, Washington, U.S. Government Printing Office, 1930, pp. 14, ills., diagrs., tabi.

- Report No. 366. Dynamic and flight tests on rubber-cord and oleo-

rubber-disk landing gears for an F6C-4 airplane, by William C. Peck.

National Advisory Committee for Aeronautics, Feb. 16,1931, Washington, U.S. Government Printing Office, 1930 [19311, pp. 19, ills., diagrs., tabls.

National Advisory Committee for Aeronautics. Report No. 367. Pressure distribution over a thick, tapered and twisted monoplane wing model—N. A.C.A. 81-J, by Carl J. Wenzinger.

National Advisory Committee for Aeronautics, Feb. 24, 1931, Washington, U.S. Govern ment Printing Office, 1930, [1931], pp. 16, ills., diagrs., tabls.

- Report No. 368. A new chart for estimating the absolute ceiling of an

airplane, by Walter S. Diehl.

National Advisory Committee for Aeronautics, Mar. 6,1931, Washington, U.S. Government Printing Office, 1930, [1931], pp. 7, diagrs., tabls.

- Report No. 369. Maneuverability investigation of the F6C-3 airplane

with special flight instruments, by C. H. Dearborn, and H. W. Kirschbaum.

National Advisory Committee for Aeronautics, March 11, 1931, Washington, U.S. Government Printing Office, 1930, [1931], pp. 21, ills., diagrs., tabl.

- Report No. 370. Effect of variation of chord and span of ailerons on

hinge moments at several angles of pitch, by B. H. Monish.

National Advisory Committee for Aeronautics, March 6, 1931, Washington, U.S. Government Printing Office, 1930, [1931], pp. 15, ills., diagrs., tabls.

- Report No. 371. Present status of aircraft instruments. Report prepared by the subcommittee on instruments.

National Advisory Committee for Aeronautics, Jan. 31, 1931, Washington, U.S. Government Printing Office, 1930, [1931], pp. 26.

- Report No. 372. The gaseous explosive reaction—the effect of pressure on

the rate of propagation of the reaction zone and upon the rate of molecular transformation, by F. W. Stevens.

National Advisory Committee for Aeronautics, Feb. 28, 1931, Washington, U.S. Government Printing Office, 1930, [1931], pp. 19, ills., diagrs.

- Report No. 373. Coefficients of discharge of fuel injection nozzles for

compression-ignition engines, by A. G. Gelalles.

National Advisory Committee for Aeronautics, March 31, 1931, Washington, U.S. Government Printing Office, 1931, pp. 19, ills., diagrs.

- Report No. 374. The automotive ignition coil, by T. H. Darnell.

National Advisory Committee for Aeronautics, April 20, 1931, Washington, U.S. Government Printing Office, 1931, pp. 28, ills., diagrs., tabls.

- Report No. 375. Full-scale tests of metal propellers at high tip speeds, by

Donald H. Wood.

National Advisory Committee for Aeronautics, June 22, 1931, Washington, U.S. Government Printing Office, 1931, pp. 22, ills., diagrs., tabls.

- Report No. 376. Some approximate equations for the standard atmosphere, by Walter S. Diehl.

National Advisory Committee for Aeronautics, March 21, 1931, Washington, U.S. Government Printing Office, 1931, pp. 12, diagrs., tabls.

- Report No. 377. A method of flight measurement of spins, by Hartley A.

Soulé and Nathan F. Scudder.

National Advisory Committee for Aeronautics, May 23, 1931, Washington, U.S. Government Printing Office, 1931, pp. 18, ills., diagrs., tabls.

- Report No. 378. Comparison of full-scale propellers having R.A.F.-6

and Clark Y airfoil sections, by Hugh B. Freeman.

National Advisory Committee for Aeronautics, June 17, 1931, Washington, U.S. Government Printing Office, 1931, pp. 20, ills., diagrs., tabls.

- Report No. 379. Rolling moments due to rolling and yaw for four wing

models in rotation, by Montgomery Knight and Carl J. Wenzinger.

National Advisory Committee for Aeronautics, May 9,1931, Washington, U.S. Government Printing Office, 1931, pp. 27, ills., diagrs., tabls.

National Advisory Committee for Aeronautics. Report No. 380. Pressure distribution over the fuselage of a PW-9 pur suit airplane in flight, by RichardV. Rhode and Eugene E. Lundquist.

National Advisory Committee for Aeronautics, May 16,1931, Washington, U.S. Government Printing Office, 1931, pp. 29, ills., diagrs., tabls.

- Report No. 381. Static, drop, and flight tests on Musselman type air-wheels, by William C. Peck and Albert P. Beard.

National Advisory Committee for Aeronautics, June 26,1931, Washington, U.S. Government Printing Office, 1931, pp. 20, ills., diagrs., tabls.

- Report No. 382. Elastic instability of members having sections common

in aircraft construction, by George W. Trayer and H. W. March.

National Advisory Committee for Aeronautics, Aug. 12,1931,Washington, U.S. Government Printing Office, 1931, pp. 42, ills., diagrs., tabls.

- Report No. 383. On the theory of wing sections with particular reference

to the lift distribution, by Theodore Theodorsen.

National Advisory Committee for Aeronautics, Aug. 22, 1931, Washington, U.S. Government Printing Office, 1931, pp. 16, ills., diagrs., tabls.

--Report No. 384. The comparative performance of superchargers, by

Oscar W. Schey.

National Advisory Committee for Aeronautics, April 15, 1931, Washington, U.S. Government Printing Office, 1931, pp. 15, ills., diagrs., tabls.

- Report No. 385. Wind tunnel tests on airfoil boundary layer control

using a backward-opening slot, by Millard J. Bamber.

National Advisory Committee for Aeronautics, Sept. 8,1931, Washington, U.S., Government Printing Office, 1931, pp. 38, ills., diagrs., tabls.

- Report No. 386. Maneuverability investigation of an F6C-4 fighting

airplane, by C. H. Dearborn and H. W. Kirschbaum.

National Advisory Committee for Aeronautics, Aug. 8,1931, Washington, U.S. Government Printing Office, 1931, pp. 25, ills., diagrs., tabls.

- Report No. 387. The vertical wind tunnel of the National Advisory Committee for Aeronautics, by Carl J. Wenzinger and Thomas A. Harris.

National Advisory Committee for Aeronautics, July 15,1931, Washington, U.S. Government Printing Office, 1931, pp. 10, ills., diagrs.

- Report No. 388. Investigation of the diaphragm-type pressure cell.

National Advisory Committee for Aeronautics, July 9, 1931, Washington, U.S. Government Printing Office, 1931, pp. 18, ills., diagrs., tabls.

- Report No. 389. The effect of small angles of yaw and pitch on the

characteristics of airplane propellers, by Hugh B. Freeman.

National Advisory Committee for Aeronautics, July 29,1931, Washington, U.S. Government Printing Office, 1931, pp. 11, ills., tabls., diagrs.

- Report No. 390. The effect of valve timing upon the performance of a

supercharged engine at altitude and an unsupercharged engine at sea level, by Oscar W. Schey and Arnold E. Biermann.

National Advisory Committee for Aeronautics, Aug. 14,1931,Washington, U.S. Government Printing Office, 1931, pp. 13, ills., diagrs.

- Report No. 391. The aerodynamic characteristics of eight very thick airfoils from tests in the variable density wind tunnel, by Eastman N. Jacobs.

National Advisory Committee for Aeronautics, July 30,1931, Washington, U.S. Government Printing Office, 1931, pp. 14, ills., diagrs., tabls.

--Report No. 392. Reduction of turbulence in wind tunnels, by Hugh L.

Dryden.

National Advisory Committee for Aeronautics, Aug. 19,1931, Washington, U.S. Government Printing Office, 1931, pp. 11, ills., diagrs., tabl.

National Advisory Committee for Aeronautics. Report No. 393. Span-load distribution as a factor in stability in roll, by Montgomery Knight and Richard W. Noyes.

National Advisory Committee for Aeronautics, Nov. 10, 1931, Washington, U.S. Government Printing Office, 1931, pp. 17, ills., diagrs., tabls.

--Report No. 394. Airship model tests in the variable density wind tunnel,

by Ira H. Abbott.

National Advisory Committee for Aeronautics, Sept. 30, 1931, Washington, U.S. Government Printing Office, 1931, pp. 24, ills., diagrs., tabls.

- Report No. 395. A new principle of sound frequency analysis, by Theodore Theodorsen.

National Advisory Committee for Aeronautics, Oct. 7,1931, Washington, U.S. Government Printing Office, 1931, pp. 15, ills., diagrs.

- Report No. 396. Hydraulics of fuel injection pumps for compression-ignition engines, by A. M. Rothrock.

National Advisory Committee for Aeronautics, Nov. 28, 1931, Washington, U.S. Government Printing Office, 1931, pp. 48, ills., diagrs., tabls.

- Report No. 397. The drag characteristics of several airships determined

by deceleration tests, by F. L. Thompson and H. W. Kirschbaum.

National Advisory Committee for Aeronautics, Oct. 12,1931, Washington, U.S. Government Printing office, 1931, pp. 15, diagrs., tabls.

- Report No. 398. Investigation of damping liquids for aircraft instruments—II, by M. R. Houseman and G. H. Keulegan.

National Advisory Committee for Aeronautics, Nov. 17, 1931, Washington, U.S. Government Printing Office, 1931, pp. 19, ills., diagrs., tabls.

-- Report No. 399. Flame movement and pressure development in an engine

cylinder, by Charles F. Marvin, jr., and Robert D. Best.

National Advisory Committee for Aeronautics, Oct. 17,1931, Washington, U.S. Government Printing Office, 1931, pp. 12, ills., diagrs., tabls.

- Report No. 400. The aerodynamic characteristics of the slotted Clark Y

wing as affected by the auxiliary airfoil position, by Carl J. Wenzinger, and Joseph A. Shortal.

National Advisory Committee for Aeronautics, Nov. 21, 1931, Washington, U.S. Government Printing Office, 1931, pp. 16, ills., diagrs., tabls.

- Report No. 401. Combustion in a high-speed compression-ignition

engine, by A. M. Rothrock.

National Advisory Committee for Aeronautics, Jan. 16,1932, Washington, U.S. Government Printing Office, 1931, pp. 17, ills., diagrs.

- Report No. 402. Effect of orifice length-diameter ratio on fuel sprays for

compression-ignition engines, by A. G. Gelalles.

National Advisory Committee for Aeronautics, Jan. 20,1932, Washington, U.S. Government Printing Office, 1931, pp. 14, ills., diagrs., tabi.

- Report No. 403. Ice prevention on aircraft by means of engine exhaust

heat and a technical study of heat transmission from a Clark Y airfoil, by Theodore Theodorsen and William C. Clay.

National Advisory Committee for Aeronautics, Feb. 13,1932, Washington, U.S. Government Printing Office, 1931, pp. 24, ills., diagrs.

- Report No. 404. The effect of increased carburetor pressure on engine

performance at several compression ratios, by Oscar W. Schey and Vern G. Rollin.

National Advisory Committee for Aeronautics, Jan. 25, 1932, Washington, U.S. Government Printing Office, 1931, pp. 12, ills., diagrs., tabi.

National Advisory Committee for Aeronautics. Report of proceedings of sixth annual Aircraft Engineering Research Conference under the auspices of the National Advisory Committee for Aeronautics, Langley Field, Virginia, May 27, 1930.

[Washington, 1931] (mimeographed), pp. 52, ill.

- Sailing down the Chesapeake Bay.

U.S. Air Services, Vol. 16, No. 7 (July 1931), Washington, pp. 27-28.

- Technical Memorandums No. 600. Resistance of plates and pipes at

high Reynolds numbers, by L. Schiller and R. Herman.

National Advisory Committee for Aeronautics, Jan. 8, 1931 (mimeographed), Washington, January 1931, pp. 13, diagrs. From Ingenieur-Archiv, September 1930.

- Technical Memorandums No. 601. Wrinkling phenomena of thin flat

plates subjected to shear stresses, by F. Bollenrath.

National Advisory Committee for Aeronautics, Jan. 19, 1931 (mimeograph), Washington, January 1931, pp. 34, ills., diagrs., tabls.

From Jahrbuch 1930 der Deutschen Versuchsanstalt für Luftfahrt E. V., München-Berlin, 1930.

- Technical Memorandums No. 602. Wrinkling of reinforced plates subjected to shear stresses, by Edgar Seydel.

National Advisory Committee for Aeronautics, Jan. 26,1931 (mimeographed), Washington, January 1931, pp. 59, diagrs., tabls.

From Jahrbuch 1930 der Deutschen Versuchsanstalt für Luftfahrt E. V., München-Berlin, 1930.

- Technical Memorandums No. 603. Clerget 100 hp heavy-oil engine, by

Pierre Léglise.

National Advisory Committee for Aeronautics, Jan. 29, 1931 (mimeographed), Washington, January 1931, pp. 10, ills. From L'Aéronautique, November 1930.

- Technical Memorandums Nos. 604, 605, 606. Flat sheet metal girder

with very thin metal web, by Herbert Wagner. Part I. General theories and assumptions. Part II. Sheet metal girders with spars resistant to bending—oblique uprights—stiffness. Part III. Sheet metal girders with spars resistant to bending—the stress in uprights—diagonal tension fields.

National Advisory Committee for Aeronautics, Feb. 5, 12, 19, 1931 (mimeographed), Washington, February 1931, pp. 38, 38, 39, diagrs.

From Zeitschrift für Flugtechnik und Motorluftschiffahrt, Vol. 20, Nos. 8, 9, 10, 11, 12, April 29, and May 14, 28, June 14, 28,1929, München-Berlin.

- Technical Memorandums No. 607. The aerodynamic wind vane and the

inherent stability of airplanes, by A. Lapresle.

National Advisory Committee for Aeronautics, Feb. 26,1931 (mimeographed), Washington, February 1931, pp. 16, ills., diagrs.

From Bulletin Technique of the Services Technique de l'Aéronautique, No. 66, February 1930.

- Technical Memorandums No. 608. The use of elektron metal in airplane

construction, by E. I. de Ridder.

National Advisory Committee for Aeronautics, Feb. 28,1931 (mimeographed), Washington, February 1931, pp. 22, ills., tabls. From Jahrbuch 1929 der Wissenschaftlichen Gesellschaft für Luftfahrt.

- Technical Memorandums No. 609. The production of turbulence, by W.

Tollmien.

National Advisory Committee for Aeronautics, March 5, 1931 (mimeographed), Washington, March 1931, pp. 32, diagrs.

Aus den Nachrichten der Gesellschaft der Wissenschaften zu Göttingen, Mathematisch-Physikalische Klasse, 1929.

National Advisory Committee for Aeronautics. Technical Memorandums No. 610. Optico-photographic measurements of airplane deformations, by Hans Georg Küssner.

National Advisory Committee for Aeronautics, March 12, 1931 (mimeographed), Washington, March 1931, pp. 16, ills., diagrs. From Zeitschrift für Flugtechnik und Motorluftschiffahrt, Vol. 21, No. 17, Sept. 15, 1930.

- Technical Memorandums No. 611. Mechanical similitude and turbulence,

by Th. v. Karman.

National Advisory Committee for Aeronautics, March 19, 1931 (mimeographed), Washington, March 1931, pp. 19, diagrs. From Nachrichten von der Gesellschaft der Wissenschaften zu Göttingen, 1930.

- Technical Memorandums No. 612. Static longitudinal stability of "Ente"

airplanes, by Heinrich Georg Kiel.

National Advisory Committee for Aeronautics, March 26, 1931, (mimeographed) Washington, March 1931, pp. 27, diagrs. From Zeitschrift für Flugtechnik und Motorluftschiffahrt, December 15, 1930.

- Technical Memorandums No. 613. Elmira soaring contest, 1930, by

Wolfram K. E. Hirth, Martin H. Schempp, and Jack Herrick.

National Advisory Committee for Aeronautics, March 31, 1931 (mimeographed), Washington, March 1931, pp. 15, tabls., maps. Prepared originally for and at the request of the National Glider Association.

- Technical Memorandums No. 614. The transference of heat from a hot

plate to an air stream, by Franz Éliâs.

National Advisory Committee for Aeronautics, April 2, 1931 (mimeographed), Washington, April 1931, pp. 25, ills., diagrs.

From Abhandlungen aus dem Aerodynamischen Institut an der Technischen Hochschule Aachen, No. 9, 1930.

- Technical Memorandums No. 615. A study of curvilinear flight, by

Helmuth Kruse.

National Advisory Committee for Aeronatuics, April 9,1931 (mimeographed), Washington, April 1931, pp. 22 ills., diagrs., tabls.

From Zeitschrift für Flugtechnik und Motorluftschiffahrt, January 28,1931, Vol. 22, No. 2, München und Berlin.

- Technical Memorandums No. 616. Aeronautical education and research,

at the Swiss Institute of Technology in Zurich, by L. Karner and J. Ackeret.

National Advisory Committee for Aeronautics, April 16, 1931 (mimeographed) Washington, April 1931, pp. 8, ills. Aero-Revue, November 15, 1930.

- Technical Memorandums No. 617. Investigation of certain wing shapes

with sections varying progressively along the span, by L. Arsandaux.

National Advisory Committee for Aeronautics, April 23, 1931 (mimeographed), Washington, April 1931, pp. 44, diagrs. Aéronautique, March, April, and May 1928.

- Technical Memorandums No. 618. Relative economy of different methods

of airplane construction, by H. Herrmann.

National Advisory Committee for Aeronautics, April 30, 1931 (mimeographed), Washington, April 1931, pp. 43, ills., diagrs.

From Zeitschrift für Flugtechnik und Motorluftschiffart, Nov. 14 and 28, 1930, München und Berlin.

- Technical Memorandums No. 619. Determination of resistance and

trimming moment of planing water craft, by P. Schröder.

National Advisory Committee for Aeronautics, May 7, 1931 (mimeographed), Washington, May 1931, pp. 8, diagrs.

From Zeitschrift für Flugtechnik und Motorluftschiffahrt, Nov. 28, 1930, München und Berlin.

National Advisory Committee for Aeronautics. Technical Memorandums No. 620. Combined pitching and yawing motion of airplanes, by A. v.

Baranoff and L. Hopf.

National Advisory Committee for Aeronautics, May 14,1931 (mimeographed), Washington, May 1931, pp. 29, diagrs. From Luftfahrtforschung, Vol. 3, No. 2, March 20, 1929, München und Berlin.

- Technical Memorandums No. 621. The take-off of seaplanes, based on a

new hydrodynamic reduction theory, by Paul Schröder.

National Advisory Committee for Aeronautics, May 21,1931 (mimeographed), Washington, May 1930, pp. 8, diagrs.

From Zeitschrift für Flugtechnik und Motorluftschiffahrt, Vol. 22, No. 1, Jan. 14, 1931, München und Berlin.

- Technical Memorandums No. 622. Landing of seaplanes, by Herbert

Wagner.

National Advisory Committee for Aeronautics, May 28,1931 (mimeographed), Washington, May 1931, pp. 15, diagrs.

From Zeitschrift für Flugtechnik und Motorluftschiffahrt, Vol. 22, No. 1, Jan. 14, 1931, München und Berlin.

- Technical Memorandums No. 623. Eleventh Rhön soaring-flight contest,

1930, by Walter Georgii.

National Advisory Committee for Aeronautics, June 4, 1931 (mimeographed), Washington, June 1931, pp. 16, diagrs., maps, tabls.

From Zeitschrift für Flugtechnik und Motorluftschiffahrt, Vol. 22, No. 5, March 14, 1931, München und Berlin.

- Technical Memorandums No. 624. Landing impact of seaplanes, by

Wilhelm Pabst.

National Advisory Committee for Aeronautics, June 11,1931 (mimeographed), Washington, June 1931, pp. 29, ills., diagrs., tabls. From Zeitschrift für Flugtechnik und Motorluftschiffahrt, Jan. 14,1931, Vol. 22, No. 1.

- Technical Memorandums No. 625. Effect of stabilizing forces of turbulence, by L. Prandtl.

National Advisory Committee for Aeronautics, June 18,1931 (mimeographed), Washington, June 1931, pp. 11, diagrs.

Sonderdruck aus Vorträge aus dem Gebiete der Aerodynamik und verwandter Gebiete, Aachen, 1929.

- Technical Memorandums No. 626. The frictionless flow in the region

around two circles, by M. Lagally.

National Advisory Committee for Aeronautics, June 25, 1931 (mimeographed), Washington, June 1931, pp. 11, diagrs. From Zeitschrift für angewandte Mathematik und Mechanik, Vol. 9, No. 4, Aug. 1929.

-1--Technical Memorandums No. 627. Airplane landing gear, by Salvatore

Maiorca.

National Advisory Committee for Aeronautics, July 2, 1931 (mimeographed), Washington, July 1931, pp. 23, ills., diagrs., tabls. From L'Aerotecnica, Vol. 10, Nos. 9 and 10, Sept.-Oct. 1930.

- Technical Memorandums No. 628. Fire prevention on aircraft, by Fritz

Kühn.

National Advisory Committee for Aeronautics, July 9, 1931 (mimeographed), Washington, July 1931, pp. 23, ills., tabls.

From Zeitschrift für Flugtechnik und Motorluftschiffahrt, Vol. 22, Nos. 7 and 8, April 14 and 28, 1931, München und Berlin.

- Technical Memorandums No. 629. The dangerous flat spin and the

factors affecting it, by Richard Fuchs and Wilhelm Schmidt.

National Advisory Committee for Aeronautics, July 16, 1931 (mimeographed), Washington, July 1931, pp. 39, ills., diagrs.

From Zeitschrift für Flugtechnik und Motorluftschiffahrt, Vol. 21, Nos. 13 and 14, July 14 and 28, 1930, München und Berlin.

National Advisory Committee for Aeronautics. Technical Memorandums No. 630. The steady spin, by Richard Fuchs and Wilhelm Schmidt.

National Advisory Committee for Aeronautics, July 23, 1931 (mimeographed), Washington, July 1931, pp. 27, ills., diagrs. From Luftfahrtforschung, Vol. 3, No. 1, Feb. 27, 1929, München und Berlin.

--Technical Memorandums No. 631. Superchargers, by Pierre Léglise.

National Advisory Committee for Aeronautics, July 31, 1931 (mimeographed), Washington, July 1931, pp. 26, ills., diagrs., tabls. From L'Aéronautique, March and April 1931.

- Technical Memorandums No. 632. Downwash measurements behind

wings with detached flow, by E. Petersohn.

National Advisory Committee for Aeronautics, Aug. 6, 1931 (mimeographed), Washington, August 1931, pp. 6, ills., diagrs.

From Zeitschrift für Flugtechnik und Motorluftschiffahrt, Vol. 10, No. 22, May 28, 1931, München und Berlin.

--Technical Memorandums No. 633. Effect of viscosity in speed measurements with double-throat venturi tubes, by H. Peters.

National Advisory Committee for Aeronautics, Aug. 13, 1931 (mimeographed), Washington, August 1931, pp. 5, diagrs.

From Zeitschrift für Flugtechnik und Motorluftschiffahrt, Vol. 22, No. 11, June 15, 1931, München und Berlin.

- Technical Memorandums No. 634. Experiments with a wing from which

the boundary layer is removed by suction, by Oskar Schrenk.

National Advisory Committee for Aeronautics, Aug. 20,1931 (mimeographed), Washington, August 1931, pp. 12, diagrs.

From Zeitschrift für Flugtechnik und Motorluftschiffahrt, Vol. 22, No. 9, May 15, 1931, München und Berlin.

- Technical Memorandums No. 635. The use of slots for increasing the

lift of airplane wings, by Fr. Haus.

National Advisory Committee for Aeronautics, Aug. 27,1931 (mimeographed), Washington, August 1931, pp. 15, diagrs. From L'Aéronautique, June 1931.

- Technical Memorandums No. 636. Experiments with airplane brakes,

by Franz Michael.

National Advisory Committee for Aeronautics, Sept. 3, 1931 (mimeographed), Washington, September 1931, pp. 28, ills., diagrs., tabls.

From Zeitschrift für Flugtechnik und Motorluftschiffahrt, Vol. 22, Nos. 10 and 11, May 28, and June 15, 1931, München und Berlin.

- Technical Memorandums No. 637. The development, design and construction of gliders and sailplanes, by A. Lippisch.

National Advisory Committee for Aeronautics, Sept. 12,1931 (mimeographed), Washington, September 1931, pp. 38, ills., diagrs. From The Journal of the Royal Aeronautical Society, July 1931.

- Technical Memorandums No. 638. The dangerous sideslip of a stalled

airplane and its prevention, by Richard Fuchs and Wilhelm Schmidt.

National Advisory Committee for Aeronautics, Sept. 17,1931 (mimeographed), Washington, September 1931, pp. 16, diagrs.

From Zeitschrift für Flugtechnik und Motorluftschiffahrt, Vol. 22, No. 13, July 14, 1931, München und Berlin.

- Technical Memorandums No. 639. On floats and float tests, by Friederich

Seewald.

National Advisory Committee for Aeronautics, Sept. 24,1931 (mimeographed), Washington, September 1931, pp. 25, diagrs.

From Zeitschrift für Flugtechnik und motorluftschiffahrt, Vol. 22, No. 9, May 15, 1931, München und Berlin.

National Advisory Committee for Aeronautics. Technical Memorandums No. 640. The new "Charlestop" remote brake transmission and control, by Pierre Léglise.

National Advisory Committee for Aeronautics, Oct. 1, 1931 (mimeographed), Washington, October 1931, pp. 3, ills. From L'Aéronautique, No. 146, July 1931.

- Technical Memorandums No. 641. Lift distribution and longitudinal

stability, by Carl Töpfer.

National Advisory Committee for Aeronautics, Oct. 8, 1931 (mimeographed), Washington, October 1931, pp. 7, diagrs.

From Zeitschrift für Flugtechnik und Motorluftschiffahrt, Vol. 22, No. 12, June 29, 1931, München und Berlin.

- Technical Memorandums No. 642. Flutter in propeller blades, by Friedrich Seewald.

National Advisory Committee for Aeronautics, Oct. 15,1931 (mimeographed), October 1931, pp. 15, diagrs.

From Zeitschrift für Flugtechnik und Motorluftschiffart, Vol. 22, Nö. 12, June 29, 1931, München und Berlin.

- Technical Memorandums No. 643. Load assumptions for the landing

impact of seaplanes, by Josef Taub.

National Advisory Committee for Aeronautics, Oct. 22, 1931 (mimeographed), Washington, October 1931, pp. 29, diagrs.

From Zeitschrift für Flugtechnik und Motorluftschifl'ahrt, Vol. 22, No. 14, July 28, 1931, München und Berlin.

- Technical Memorandums No. 644. On atomization in carburetors, by

F. N. Scheubel.

National Advisory Committee for Aeronautics, Nov. 29, 1931 (mimeographed), Washington, October 1931, pp. 10, ills., diagrs. From Jahrbuch der Wissenschaftlichen Gesellschaft für Luftfahrt, 1927.

- Technical Memorandums No. 645. Relations between ship design and

seaplane design, by Georg Schnadel.

National Advisory Committee for Aeronautics, Nov. 5, 1931 (mimiographed), Washington, November 1931, pp. 10, diagrs.

From Zeitschrift für Flugtechnik und Motorluftschiffahrt, Vol. 22, No. 15, August 14, 1931, München und Berlin.

- Technical Memorandums No. 646. Measurement of visibility from the

pilot's cockpit on different airplane types, by Gerhard Kurz.

National Advisory Committee for Aeronautics, Nov. 12,1931 (mimeographed), Washington, November 1931, pp. 17, ills., diagrs.

From Zeitschrift für Flugtechnik und Motorluftschiffahrt, Vol. 22, No. 6, March 28, 1931, München und Berlin.

- Technical Memorandums No. 647. Spatial buckling of various types of

airplane strut systems, by Alfred Teichmann.

National Advisory Committee for Aeronautics, Nov. 19,1931 (mimeographed), Washington, November 1931, pp. 8, tabls.

From Zeitschrift für Flugtechnik und Motorluftschiffahrt, Vol. 22, No. 17, Sept. 14, 1931, München und Berlin.

- Technical Memorandums No. 648. Measurements of vertical air currents

in the atmosphere, by K. O. Lange.

National Advisory Committee for Aeronautics, Nov. 25, 1931 (mimeographed), Washington, November 1931, pp. 9, ills., diagrs.

From Zeitschrift für Flugtechnik und Motorluftschiffahrt, Vol. 22, No. 17, Sept. 14, 1931, München und Berlin.

- Technical Memorandums No. 649. Liquid cooling of aircraft engines, by

Hanns Weidinger.

National Advisory Committee for Aeronautics, Dec. 3, 1931 (mimeographed), Washington, December 1931, pp. 11, ills., diagrs.

From Zeitschrift für Flugtechnik und Motorluftschiffahrt, Vol. 22, No. 18, Sept. 28, 1931, München und Berlin.

National Advisory Committee for Aeronautics. Technical Memorandums No. 650. Development of a non-autorotative airplane capable of steep landing, by Wilhelm Schmidt.

National Advisory Committee for Aeronautics, Dec. 10, 1931 (mimeographed), Washington, December 1931, pp. 26, ills., diagrs.

From Zeitschrift für Flugtechnik und Motorluftschiffahrt, Vol. 22, Nos. 18, 19, Sept. 28, and Oct. 14,1931, München und Berlin.

- Technical Memorandums No. 651. Wind tunnel of the Bucharest Polytechnic Institute.

National Advisory Committee for Aeronautics, Dec. 17, 1931 (mimeographed), Washington, December 1931, pp. 2, ills.

- Technical Memorandums No. 652. Goldstein's solution of the problem

of the aircraft propeller with a finite number of blades, by H. B. Helmbold.

National Advisory Committee for Aeronautics, Dec. 23,1931 (mimeographed), Washington, December 1931, pp. 7, diagrs. From Zeitschrift für Flugtechnik und Motorluftschiffahrt, Vol. 22, No. 14, July 28,1931.

- Technical Notes No. 360. The pressure distribution over a square wing

tip on a biplane in flight, by Richard V. Rhode and Eugene E. Lundquist.

National Advisory Committee for Aeronautics, Jan. 13, 1931 (mimeographed), Washington, January 1931, pp. 22, diagrs., tabls.

- Technical Notes No. 361. The effect of small variations in profile of airfoils, by Kenneth E. Ward.

National Advisory Committee for Aeronautics, Jan. 20, 1931 (mimeographed), Washington, January 1931, pp. 9, diagrs., tabl.

- Technical Notes No. 362. Lift and drag characteristics of a cabin monoplane determined in flight, by F. L. Thompson and P. H. Keister.

National Advisory Committee for Meronautics, Jan. 27,1931 (mimeographed), Washington, January 1931, pp. 11, ills., diagrs., tabls.

- Technical Notes No. 363. The behavior of conventional airplanes in

situations thought to lead to most crashes, by Fred E. Weick.

National Advisory Committee for Aeronautics, Feb. 3, 1931 (mimeographed), Washington, February 1931, pp. 13, ill., diagrs.

—:— Technical Notes No. 364. Tests in the variable density wind tunnel to investigate the effects of scale and turbulence on airfoil characteristics, by John Stack.

National Advisory Committee for Aeronautics, Feb. 10, 1931 (mimeographed), Washington, February 1931, pp. 15, ill., diagrs.

- Technical Notes No. 365. Interference effects and drag of struts on a

monoplane wing, by Kenneth E. Ward.

National Advisory Committee for Aeronautics, Feb. 17,1931 (mimeographed), Washington, February 1931, pp. 12, ills., diagrs., tabls.

- Technical Notes No. 366. Torsion in box wings, by John B. Wheatley.

National Advisory Committee for Aeronautics, Feb. 24, 1931 (mimeographed), Washington, February 1931, pp. 44, diagrs.

- Technical Notes No. 367. The aerodynamic characteristics of three

tapered airfoils tested in the variable density wind tunnel, by Raymond F. Anderson.

National Advisory Committee for Aeronautics, Feb. 28, 1931 (mimeographed), Washington, February 1931, pp. 12, ill., diagrs., tabls.

- Technical Notes No. 368. The variation in pressure in the cabin of an

airplane in flight, by Melvin N. Gough.

National Advisory Committee for Aeronautics, March 24, 1931 (mimeographed), Washington, March 1931, pp. 6, ills., diagrs.

National Advisory Committee for Aeronautics. Technical Notes No. 309. Effect of orifice length-diameter ratio on the coefficient of discharge of fuel-injection nozzles, by A. G. Galalles and E. T. Marsh.

National Advisory Committee for Aeronautics, March 31, 1931 (mimeographed), Washington, March 1931, pp. 15, diagrs., tabl.

- Technical Notes No. 370. Strength tests on paper cylinders in compression, bending, and shear, by Richard V. Rhode and Eugene E. Lundquist.

National Advisory Committee for Aeronautics, April 7, 1931 (mimeographed), Washington, April 1931, pp. 14, ills., diagrs., tabls.

- Technical Notes No. 371. Experiments with an airfoil model on which

the boundary layer is controlled without the use of supplementary equipment, by 1. H. Abbott-National Advisory Committee for Aeronautics, April 14,1931 (mimeographed), Washington,

April 1931, pp. 6, ill., diagrs.

- Technical Notes No. 372. Development of an impinging-jet fuel-injection

valve nozzle, by J. A. Spanogle and G. T. Hemmeter.

National Advisory Committee for Aeronautics, April 21,1931 (mimeographed), Washington, April 1931, pp. 9, ills., diagrs.

- Technical Notes No. 373. Investigation of the discharge rate of a fuel-injection system, by Harold C. Gerrish and Fred Voss.

National Advisory Committee for Aeronautics, April 25,1931 (mimeographed), Washington, April 1931, pp. 11, ills., diagrs., tabl.

- Technical Notes No. 374. Preliminary study of applied load factors in

bumpy air, by Richard V. Rhode and Eugene E. Lundquist.

National Advisory Committee for Aeronautics, April 30,1931 (mimeographed), Washington April 1931, pp. 30, diagrs., tabls.

- Technical Notes No. 375. Moments of inertia of several airplanes, by

Marvel P. Miller and Hartley A. Soule\

National Advisory Committee for Aeronautics, May 5, 1931 (mimeographed), Washington, May 1931, pp. 6, diagr., tabls.

- Technical Notes No. 376. Effect of high air velocities on the distribution

and penetration of a fuel spray, by A. M. Rothrock.

National Advisory Committee for Aeronautics, May 9, 1931 (mimeographed), Washington, May 1931, pp. 10, ills., diagrs.

- Technical Notes No. 377. An integrating manometer for use in wind

tunnel pressure distribution measurements, by Richard W. Noyes.

National Advisory Committee for Aeronautics, May 12,1931 (mimeographed), Washington, May 1931, pp. 6, ills., tabl.

'- Technical Notes No. 378. Comparison of weights of 17ST and steel

tubular structural members used in aircraft construction, by E. C. Hartmann. National Advisory Committee for Aeronautics, May 19,1931 (mimeographed), Washington, May 1931, pp. 17, diagrs.

—:— Technical Notes No. 379. The pressure distribution over a semicircular wing tip on a biplane in flight, by Richard V. Rhode and Eugene E. Lundquist.

National Advisory Committee for Aeronautics, May 26,1931 (mimeographed), Washington, May 1931, pp. 14, diagrs., tabls.

- Technical Notes No. 380. A suggested method for measuring turbulence,

by C. Fayette Taylor.

National Advisory Committee for Aeronautics, June 22,1931 (mimeographed), Washington, June 1931, pp. 7, diagrs.

National Advisory Committee for Aeronautics. Technical Notes No. 381. Endurance and other properties at low temperatures of some alloys for aircraft use, by H. W. Russell and W. A. Welcker, jr.

National Advisory Committee for Aeronautics, June 12,1931 (mimeographed), Washington, June 1931, pp. 16, ills., diagrs., tabls.

- Technical Notes No. 382. Basic requirements of fuel-injection nozzles

for quiescent combustion chambers, by J. A. Spanogle and H. H. Foster.

National Advisory Committee for Aeronautics, June 23,1931 (mimeographed), Washington, June 1931, pp. 6, diagrs.

- Technical Notes No. 383. Metal-truss wing spars, by Andrew E. Swick-

ard.

National Advisory Committee for Aeronautics, July 24, 1931 (mimeographed), Washington, July 1931, pp. 31, diagrs., tabls.

- Technical Notes No. 384. The effect of injection-valve opening pressure

on spray-tip penetration, by A. M. Rothrock and E. T. Marsh.

National Advisory Committee for Aeronautics, July 27, 1931 (mimeographed), Washington, July 1931, pp. 4, diagrs.

- Technical Notes No. 385. Tests of six symmetrical airfoils in the variable

density wind tunnel, by Eastman N. Jacobs.

National Advisory Committee for Aeronautics, July 31,1931 (mimeographed), Washington, July 1931, pp. IS, ill., diagrs., tabl.

- Technical Notes No. 386. Effect of nose shape on the characteristics of

symmetrical airfoils, by Robert M. Pinkerton.

National Advisory Committee for Aeronautics, Aug. 14,1931 (mimeographed), Washington, August 1931, pp. 16, diagrs., tabls. .*

- Technical Notes No. 387. The pressure distribution over a modified

elliptical wing tip on a biplane in flight, by Richard V. Rhode and Eugene E. Lundquist.

National Advisory Committee for Aeronautics, Aug. 23, 1931 (mimeographed), Washington, August 1931, pp. 14, diagrs., tabls.

- Technical Notes No. 388. A comparison of the aerodynamic characteristics of three normal and three reflexed airfoils in the variable density wind tunnel, by George L. Defoe.

National Advisory Committee for Aeronautics, Aug. 31,1931 (mimeographed), Washington, August 1931, pp. 12, ills., tabls.

---Technical Notes No. 389. The N.A.C.A. apparatus for studying the

formation and combustion of fuel sprays and the results from preliminary tests, by A. M. Rothrock.

National Advisory Committee for Aeronautics, Sept. 2, 1931 (mimeographed), Washington, September 1931, pp. 22, ills., diagrs., tabls.

--Technical Notes No. 390. A method for reducing the temperature of

exhaust manifolds, by Oscar W. Schey and Alfred W. Young.

National Advisory Committee for Aeronautics, Sept. 8,1931 (mimeographed), Washington, September 1931, pp. 9, ills., diagr., tabl.

- Technical Notes No. 391. Tests of N.A.C.A. airfoils in the variable-density wind tunnel. Series 43 and 63, by Eastman N. Jacobs and Robert M. Pinkerton.

National Advisory Committee for Aeronautics, Sept. 15,1931 (mimeographed), Washington, September 1931, pp. 32, diagrs., tabls.

--Technical Notes No. 392. Tests of N.A.C.A. airfoils in the variable-density wind tunnel. Series 45 and 65, by Eastman N. Jacobs and Robert M. Pinkerton.

National Advisory Committee for Aeronautics, Sept. 22,1931 (mimeographed), Washington.-September 1931, pp. 30, diagrs., tabls.

National Advisory Committee for Aeronautics. Technical Notes No. 393. An investigation of cotton for parachute cloth, by Wm. D. Appel and R. K. Worner.

National Advisory Committee for Aeronautics, Sept. 29,1931 (mimeographed), Washington, September 1931, pp. 21, tabls.

- Technical Notes No. 394. The prevention of ice formation on gasoline

tank vents, by Theodore Theodorsen and William C. Clay.

National Advisory Committee for Aeronautics, Oct. 6, 1931 (mimeographed), Washington, October 1931, pp. 7, ills., diagrs., tabls.

- Technical Notes No. 395. Penetration and duration of fuel sprays from

a pump injection system, by A. M. Rothrock and E. T. Marsh.

National Advisory Committee for Aeronautics, Oct. 20,1931 (mimeographed), Washington, October 1931, pp. 16, ills., diagrs.

--Technical Notes No. 396. Performance of a compression-ignition engine

with a precombustion chamber having high-velocity air flow, by J. A.

Spanogle and C. S. Moore.

National Advisory Committee for Aeronautics, Nov. 14,1931 (mimeographed), Washington, October 1931, pp. 15, ills., diagrs.

- Technical 'Notes No. 397. The aerodynamic characteristics of six commonly used airfoils over a large range of positive and negative angles of attack, by Raymond F. Anderson.

National Advisory Committee for Aeronautics, Nov. 3,1931 (mimeographed), Washington, November 1931, pp. 5, diags., tabl.

- Technical Notes No. 398. The effect of slots and flaps on the lift and drag

of the McDonnell airplane as determined in flight, by Hartley A. Soule\

National Advisory Committee for Aeronautics, Nov. 10,1931 (mimeographed), Washington, November 1931, pp. 12, ills., diagrs., tabls.

--Technical Notes No. 399. Some characteristics of fuel sprays at low-injection pressures, by A. M. Rothrock and C. D. Waldon.

National Advisory Committee for Aeronautics, Nov. 17,1931 (mimeographed), Washington, November 1931, pp. 6, ills., diagrs.

- Technical Notes No. 400. Advantages of oxide films as bases for aluminum pigmented surface coating for aluminum alloys, by R. W. Buzzard and W. H. Mutchler.

National Advisory Committee for Aeronautics, Nov. 24,1931 (mimeographed), Washington, November 1931, pp. 16, ills., diagrs.

- Technical Notes No. 401. Tests of N.A.C.A. airfoils in the variable

density wind tunnel. Series 44 and 64, by Eastman N. Jacobs and Robert M. Pinkerton.

National Advisory Committee for Aeronautics, Dec. 1, 1931 (mimeographed), Washington, December 1931, pp. 31, diagrs., tabls.

- Technical Notes No. 402. The effectiveness of a double-stem injection

valve in controlling combustion in a compression-ignition engine, by J. A. Spanogle and E. G. Whitney.

National Advisory Committee for Aeronautics, Dec. 15,1931 (mimeographed), Washington, December 1931, pp. 19, diagrs.

■- Technical Notes No. 403. The interference effects on an airfoil of a flat

plate at mid-span position, by Kenneth E. Ward.

National Advisory Committee for Aeronautics, Dec. 22,1931 (mimeographed), Washington, December 1931, pp. 16, ills., diagrs., tabls.

--II tunnel aerodinamico per ricerche sui propulsori del Comitato Nazionale

Consultivo per l'Aeronautica (N.A.C.A.).

Riv. Aer., Anno 7, N. 2 (feb.1931). Roma, pp. 331-343, ills., diagrs. 69261—35-14

National Advisory Committee for Aeronautics. See Ames, Joseph Sweet-man: Glancing back at 1930. Scientific progress.

- See Klemin, Alexander: Recent aircraft engineering research.

- See Schey, Oscar William: Superchargers and supercharging. A summary

of the data obtained during an important series of experiments carried out by the N.A.C.A.

- See Tichenor, Frank A.: Air—hot and otherwise. The N.A.C.A. counters.

National Air Races. Complete and official results of the 1931 National Air Races.

Western Flying, Vol. 10, No. 4 (Oct. 1931), Los Angeles, Calif., pp. 18-19, ports.

- Complete list of events at the National Air Races.

Aero Digest, Vol. 19, No. 3 (Sept. 1931), New York, pp. 36-37, 102.

- National Air Race results.

Aero Digest, Vol. 19, No. 4 (Oct. 1931), New York, pp. 38-39, 112, ills.

--National Air Races.

Aero Digest, Vol. 19, No. 3 (Sept. 1931), New York, pp. 35, 116.

- National Air Races at Cleveland this month.

U.S. Air Services, Vol. 16, No. 8 (Aug. 1931), Washington, pp. 38-39.

- National race program.

Airway Age, Vol. 13, No. 5 (Aug. 1, 1931), New York, pp. 122-125.

- The 1931 air races.

Airway Age, Vol. 13, No. 10 (Sept. 5, 1931), New York, pp. 192,198.

- $100,000 in prizes.

Western Flying, Vol. 9, No. 6 (June 1931), Los Angeles, Calif., p. 39.

- Setting the stage for the races.

Aviation, Vol. 30, No. 9 (Sept. 1931), New York, pp. 516-517, ills.

- 236 M.P.H.

Western Flying, Vol. 10, No. 4 (Oct. 1931), Los Angeles, Calif., pp. 14-19, ills., ports.

- The U.S. National Air Races.

Aeroplane, Vol. 41, No. 14 (Sept. 30, 1931), London, pp. 822-824.

k - World aviation passes in review at 1931 National air races.

Nat. Aer. Mag., Vol. 9, No. 9 (Sept. 1931), Washington, pp. 24-29, ills.

- See Cleveland: Die grossen amerikanischen Luftspiele in Cleveland.

"National air Races."

- See Cleveland: National Races go to Cleveland.

- See Mockler, Don: The National Air Races for 1931.

-- See Murphy, Pat: Grandstand observations at the air races.

- See Tichenor, Frank A.: Air—hot and otherwise.

National Air Transport. N.A.T.—Ford wing mail compartments. Aero Digest, Vol. 18, No. 1 (Jan. 1931), New York, p. 94, ill.

National Aircraft Show. National Aircraft Show. Detroit city airport, Detroit, Michigan, April 11 to 19, 1931.

Aero Digest, Vol. 18, No. 4 (April 1931), New York, pp. 39-41, ills.

National Board of Fire Underwriters. See Blee, Harry H.: Protección de hangeres de aeroplanos. Resumen del informe del comité de investigaciones sobre el control de hangeres para aeroplanos por applicación automática del agua.

National Conference on Uniform Aeronautic Regulatory Laws. Proceedings of the National Conference on Uniform Aeronatuic Regulatory Laws, December 16 and 17, 1930, Washington, D.C.

Washington, U.S. Government Printing Office, 1931, pp. 126. United States Department of Commerce, Aeronautics Branch. Two editions; second edition revised.

National Foreign Trade Council. Our air mail service with Lation America. New York, The National Foreign Trade Council, 1931, pp. 32, map, tabls. Fact Finding Pamphlets in Foreign Trade, No. 10.

National Guard. See Everson, William G.: Our National Guard Air Corps.

National Physical Laboratory. National Physical Laboratory. Aerodynamics Department. Wind tunnel design. Fluid motion. Engineering, Vol. 132, No. 3420 (July 31, 1931), London, pp. 142-143, ill.

- The National Physical Laboratory. Racing seaplanes and new aircraft.

Airscrews. Thrust integrating tubes.

Engineering, Vol. 132, No. 3422 (Aug. 14, 1931), London, pp. 209-210, diagrs.

- Report for the year 1930.

London, Published by His Majesty's Stationery Office for the Department of Scientific and Industrial Research, 1931, pp. 295, ills., diagrs.

For the Research Department and the aeronautical Research Committee, pp. 197-209. Report on the Aerodynamics Department: Apparatus and equipment, pp. 220-226: Aerodynamic researches, pp. 227-248.

- See Lock, C. N. H., and A. R. Collar: Exploration of the flow near the

screw proposed for the N.P.L. compressed air tunnel.

- See R. 101: Cause of the loss of R. 101. Conclusions of the Court and a

summary of investigations made at the National Physical Laboratory. Experiments and calculations carried out at the National Physical Laboratory (Prepared by Professor C. E. Inglis).

Nautilus. See Derstroff, Hanns: Die polarfahrt des "Graf Zeppelin." "SOS Nautilus" kein "Stop Zeppelin."

- See Kohrs, W.: Nautilus und Zeppelin.

Navarro. The Navarro "Chief." A low-powered three-engined monoplane three-seater.

Flight, No. 1158, Vol. 23, No. 10 (March 6,1931), London, 198-200, ills.

Navigation. See Barbieri, Fortunato: Navigazione aerea; corso allievi piloti— anno 1931.

- See Block, Walter: Die Prüfung von Objektiven auf Verzeichnungsfehler.

- See Connor, Harry P.: Crossing the North Atlantic.

- See Dreisonstok, Joseph Young: Navigation tables for mariners and

aviators.

- See Dreisonstok, Joseph Young: Rapid air navigation.

- See Everitt, P. F.: Tables for use in aero navigation by astronomical

methods.

208 NATIONAL ADVISORY COMMITTEE FOR AERONAUTICS Navigation. See Fauvel, Ch.: La naviregle.

- See Gingrich, John Edward: Aerial and marine navigation tables.

- See Hawks, Frank: Navigation ä la slide rule.

—— See Holland, Harvey Hodges: Avigation.

- See Ide, John Jay: The Loth system of navigation by rotating radio

beacons.

- See Jones, Bradley: Avigation.

- See Lacmann, Otto: Entzerrungsgerat für nicht ebenes Gelände.

- See Potter, Leslie S.: Navigation in ground schools.

- See Potter, Leslie S.: The navigation of the air and meteorology.

- See Radio: Jämförelse mellan olika system for navigation av flygplan

medelst radio.

-—=— See Severino, Giuseppe: Sulle determenazioni di posizione con una sola osservazione d'altezza.

--See Stewart, C. J.: Determination of position in high latitudes, with

particular reference to aircraft observation.

- See Swoffer, Frank Arthur: Air navigation for the private owner; a course

of elementary aerial navigation.

- See Tenani, M.: Un nuovo tipo di sestante per aeronautica.

- See Trojani, F.: Aviazione; lezioni tenute agli allievi piloti di aeroplano

1931.

- See United States Department of Commerce. Aeronautics Branch: Air

navigation maps. July 1. 1931.

- See United States Department of Commerce. Aeronautics Branch:

List of air navigation charts. October 15, 1929.

- See United States Hydrographie Office; Position tables for aerial and

surface navigation.

- See Weems, Philip Van Horn: Air navigation.

Naviregle. See Fauvel, Ch.: La naviregle.

Navy. See Army-Navy: A N standards conference.

Nayler, J. L., and E. Ower. Aviation of to-day; its history and development;

with a chapter on aircraft engines by W. J. Stern. ' ' Wayside and Woodland Series, New York, Frederick Warner & Co., 1931, pp. 510, ills.

N B trainer. See Whitaker, Jack: Demonstration flights of the new N B trainer.

■•• Nebesar, Robert J. Supercharging the aeroplane engine and increasing speed with altitude.

Aircraft Engineer, Flight Engineering Section, Suppl. to No. 1200, Vo. 23, No. 52 (Dec. 25, 1931), London, pp. 1264a-1264e (89-93), diagrs., tabls.

•Neerlandia. Ballonvaart "Neerlandia" op 17 November 1930. Het Vliegveld, 15 de Jaarg., No. 1 (Jan. 1931), Amsterdam, p. 10.

Netherlands. Opgave van in Nederland ingeschreven vliegtuigen. Departement van Waterstaat. Luchtvaartdienst.

Het Vliegveld, 15 de Jaarg., No. 11 (Nov. 1931), Amsterdam, pp. 390-391.

- See Austria: Oesterreich. Vertrag zwischen der Republik ' Oesterreich

und dem Königreich der Niederlande über den Luftverkehr.

- See Franquinet, E.: Is binnenlandsch luchtverkeer in Ncderland in de

naaste toekomst mogelijk?

- See Congrès International de la Navigation Aérienne; Cinquième Congrès

International de la Navigation Aérienne. Organisé sous les auspices du Gouvernement Néerlandais par l'Aéro-Club Royal des Pays-Bas. La Haye, 1-6, Septembre 1930.

- See Snijders, C. J.: Nederland's plaats in het wereldluchtverkeer.

Neue Augsburger Zeitung. Professor Piccards forschungsflug in die Stratosphäre; verlauf des stratosphärenfluges und dessen wissenschaftliches ergebnis. Mit Beiträgen von Professor Dr. A. Piccard, ingénieur P. Kipfer und anderen sachverständigen, hrsg. von der Neuen Augsburger Zeitung. Augsburg, Literar. Institut von Haas & Grabber, 1931, pp. 128, ills.

Neumark, Stefan. Badanie wolnego spadku z uwzglçdnieniem oporu powietrza o zmiennej gçstoéci.

Instytut Badan Technicznych Lotnictwa, Sprawozdanie kwartalne Nr. 5 (Nr. 20), War-szawa, 1921, pp. 5-22, ill., diagrs., tabls.

- Badanie wolnego spadku z uwzglednieniem oporu powietrza o zmiennej

gestosci.

1931, pp. 19. Odbitka ze spraw ozdania kwartalnego Nr. 5 Instytutu Daban technicznych. Lotnictwa, 1931.

- Dalsze uwagi o hamowaniu köl l^duj^cego samolotu. (Remarques

supplémentaires sur le freinage des roues de l'avion pendant l'atterrissage).

Instytut Badan Technicznych Lotnictwa, Sprawozdanie, Bulletin No. 7, Nr. 35, Warszawa, 1931, pp. 23-24.

- Hamowanie köl l^duj^cego samolotu. (Le freinage des roues de l'avion

pendant l'atterrissage).

Instytut Badan Technicznych Lotnictwa, Sprawozdanie, Bulletin No. 6 (Nr. 27),: Warszawa, 1931, pp. 15-32, ills., diagrs.

- Les profils d'aviation à centre de poussée fixe.

Prace Instytutu Aerodynamicznego w Warszawie prowadzone pod kierunkiem prof. O. Witoszynskiego, Zeszyt III, Warszawa, 1930, pp. 1-69, ills., diagrs., tabls.

- Sur les formes diverses du potentiel servant a calculer les forces qui

agissent sur les profils d'aviation.

Prace Instytutu Aerodynamicznego w Warszawie, Zeszyt I, Warszawa, 1927, pp. 37-84, ills., diagrs., tabls.

Nevill, John T. The national aircraft show of 1931.

Aviation, Vol. 30, No. 4 (April 1931), New York, pp. 210-212, ill.

New Guinea. See Brandes, E. W.: Prospecting by air over Papuan jungles.

N ew York. Municipal airport at New York.

Airway Age, Vol. 12, No. 10 (June 6,1931), New York, pp. 581-582, ills.

- New York City dedicates its airport.

Aviation, Vol. 30, No. 6 (June 1931), New York, pp. 342-343, ills.

New York. Report of the fact-finding committee on suitable airport facilities for the New York metropolitan district. New York, 1927, pp. 10, maps.

- See Allen, C. B.: Aerial police of New York City.

New York State. Laws affecting aviation of the State of New York. Published by the New York State Commission on Aviation. Albany, N.Y., J. B. Lyon Company, printers, 1931, pp. 21.

--See Roth, B.: Air branch of New York state police.

New York University. Technical notes of the Daniel Guggenheim School'of Aeronautics, College of Engineering, New York University, No. 1— New York, 1931, ills., diagrs.

Newcomb, J. Arthur. Transatlantic flights, 1931.

U.S. Air Services, Vol. 16, No. 11 (Nov. 1931), Washington, D.C., pp. 29-30.

N ewell, Joseph S. Structural design progress in 1930.

Airway Age, Vol. 12, No. 1 (Jan. 1931), New York, pp. 48-49, ill.

Newspaper Work. See Piersol, James V.: Adapting the airplane to the newspaper. A report covering an experiment conducted by the Detroit News.

Newton, Byron R. One of the greatest achievements in the story of the human race.

U.S. Air Services, Vol. 16, No. 12 (Dec. 1931), Washington, D.C., pp. 19-24, ills.

N iccoLiNi, Pietro. La conquista del volo. Poesia e realta. Ferrara, Induatrie Grafiche, 1931, pp. 36.

N iCHOLLs, Palmer. Serving aviation in the west.

Aero Digest, Vol. 19, No. 6 (Dec. 1931), New York, pp. 86-87, ills.

Nichols, P. W. The Alexander Flyabout.

National Glider and Airplane News, Vol. 3, No. 2 (Sept. 1931), p. 18, ill.

Night Flying. See Croydon: Night flying at Croydon.

- See Mail: Night flying and air mails.

Niles, Alfred S. Analysis of shallow truss spars. Parts 1, 2, and 3.

Airway Age, Vol. 13, Nos. 5, 10, 14 (Aug. 1, Sept. 5, Oct. 3, 1931), New York, pp. 114-116, 199-201,224,267-270,304, ills., tabls.

- West coast progress in 1930. Transportation, airports, and design

discussed.

Airway Age, Vol. 12, No. 1 (Jan. 1931), New York, p. 47.

1930. L'année aéronautique 1930.

L'Aérophile, 39e année, No. 5 (15 mai 1931), Paris, pp. 131-134, ills.

- See Airports: Airport construction in 1930.

- See Besançon, Georges: L'année aéronautique.

- See Bowen, R. Sidney, Jr.: Trends of the industry during 1930.

- See Chenoweth, Opie: Engines in 1930.

- See Design: 1930 airplane design.

- See Doane, R. R.: Aeronautical finance in 1930.

- See Hanson, Earl: Canadian Aviation—1930.

1930. See McAlery, C. M.: The Royal Air Force in 1930.

- See Marolles, R. J. de: The 1930 Paris show—European and American

practices.

- See Newell, Joseph S.: Structural design progress in 1930.

- See Niles, Alfred S.: West coast progress in 1930.

- See Pearson, John B.: Materials in 1930.

- See Roché, J. A.: Engineering, 1930-31.

- See Weather: Notes on the weather of 1930.

1930-1931. Zur Jahreswende!

Luftschau, 4. Jahrg., Nr. 1 (10. Jan. 1931), Berlin, pp. 1-2.

1931. Aeronautical diary 1931.

London, Gale and Polden, ltd.

- See Bigelow, A. A.: Airport growth in 1930-31.

- See Buenos Aires: The British Empire exhibition, Buenos Aires, 1931.

- See Clephane, Douglas W.: Light planes and 1931.

- See Deming, William C: Shattering world's records in 1931.

- See Detroit: The Detroit aircraft exhibition.

- See Detroit: Looking at the 1931 show.

- See Grey, Charles Grey: Europe in 1930-31.

- See National air races: National race program.

- See National air races: The 1931 air races.

- See National air races: World aviation passes in review at 1931 National

air races.

- See Nevill, John T.: The national aircraft show of 1931.

- See Warner, Edward Pearson: What of the year to come.

Nishimtjra, Genrokuro. See Sezawa, Katsutada, and Genrokuro Nishimura: Stresses under tension in a plate with a heterogeneous insertion.

Nistri, Umberto. Un método por l'addestramento del bombardiere e per il controllo sperimentale del tiro dall'alto.

Riv. Aer., Anno 7, N. 9 (sett. 1931), Roma, pp. 447-477, ills.

Nixon, Laurence A. Airline rates and routes. Vols. 1-2; Oct. 1929-July 1930. East Stroudsburg, Penna., Air Transportation, inc., 1929-30, ills., maps.

Nobile, Umberto. II voló alia conquesta del segreto Polare. Milano, A. Mondadori.

- With the "Italia" to the North Pole.

New York, Dodd, Mead, 1931, pp. 358, ills. Translated by Frank Fleetwood.

- See Schaff er, Ernst: Glück ab; bahnbrecher der lüfte.

Noise. Aircraft noise.

Aeronautics, Techn. Rep. Aero. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 62-65.

Noise.

Aeroplane, Vol. 40, No. 16 (April 22, 1931), London, pp. 725-726, 728, tabls.

- On noise in aeroplanes.

Aeroplane, Vol. 40, No. 16 (April 22, 1931), London, pp. 701-702. 704, 706, 708, ills.

- See Davis, A. H.: Noise.

Nomenclature. Nomenclatore del materiale speciale d'aeronautica. Volume 3°, categoria la fascicolo 15: Catalogo nomenclatore delle aggiunte e varianti da apportare al nomenclatore del velivolo A 300-4, trasformato in A 300-6, con motore A 20. (Ministero dell'aeronautica; Direzione generale delle costruzioni e degli approvvigionamenti).

Torino, tip. Quartara, 1930, pp. 51.

- See Hegener, Henri: Taalzuivering.

- See Thorpe, Leslie Aaron: Simplified definitions and nomenclature for

aeronautics.

Noordung, Hermann. Das problem der befahrung des weltraums; der raketenmotor.

Berlin, R. C. Schmidt & Co., 1929, pp. 188, ills., diagrs. North Pole. See Polar exploration.

Norway, N. S. R. 100 Canadian flight, 1930. Journal written on board the ship. Nothing has been added since.

Journ. Roy. Aer. Soc, Vol. 35, No. 245 (May 1931), London, pp. 401-414.

Nosari, Adone. Ali e vele sull'Atlantico.

Milano, Casa editrice Ceschina, 1931, pp. 283, ills.

Noto, Hisashi. Electric oscillations in the atmosphere.

Japanese Journal of Astronomy and Geophysics, Vol. 8, No. 3, Tokyo, 1931, pp. 187-207, ills., tabls.

Noville, George O. Ice on the wings.

National Glider and Airplane News, Vol. 3, No. 2 (Sept. 1931), New York, pp. 20, 70.

Noyes, Richard Woodman. An integrating manometer for use in wind tunnel pressure distribution measurements.

National Advisory Committee for Aeronautics, Technical Notes No. 377, May 12, 1931, Washington, May 1931, pp. 6, ills., tabi.

- See Knight, Montgomery, and Richard W. Noyes: Span-load distribution

as a factor in stability in roll.

Nozzles. See Gelalles, Achilles George: Coefficients of discharge of fuel injection nozzles for compression-ignition engines.

- See Gelalles, Achilles George, and E. T. Marsh: Effect of orifice length-diameter ratio on the coefficient of discharge of fuel-injection nozzles.

- See National Advisory Committee for Aeronautics: The design of injection

nozzles. A summary of five N.A.C.A. reports on systematic investigations of practical use for engineers.

- See Spanogle, J. A., and G. T. Hemmeter: Development of an impinging-

jet fuel-injection valve nozzle.

Numachi, Fukusaburó. Aerofoil theory of propeller turbines and propeller pumps with special reference to the effects of blade interference upon the lift and cavitation.

The Technology Report of the Tokoku Imperial University, Vol. 8, No. 3, 1929, Sendai, Japan.

Nungebser, Charles. See Calembert, Baron Louis de: Nungesser—as I knew him.

Nutt, Arthur. The cooling of engines. Experiments undertaken to show the possibilities of high temperature liquid cooling.

Aircraft Engineering, Vol. 3, No. 29 (July 1931), London, pp. 172-173, ills.

- Installing the engine.

Western Flying, Vol. 9, No. 6 (June 1931), Los Angeles, Calif., pp. 26-29, ills.

Nutt, A. E. Woodward, A. F. Scroggs, and E. Finn. Range of aircraft with

air-cooled radial engine using altitude control.

Aer. Res. Comm., Rep. Mem., No. 1399 (Ae. 520-T. 3090), November 1930, London, 1931, pp. 8, diagrs.

Nutt, A. E. Woodward. See Finn, E., and A. E. Woodward Nutt: Accelerations on aircraft during manœuvres.

- See Maitland, C. E., and A. E. Woodward Nutt: Flight tests on the

variation of the range of an aircraft with speed and height.

- See Stevens, H. L., and A. E. Woodward Nutt: Charts for aircraft performance reduction.

O

Oberbeck. See Banarji and Barave: On Oberbeck's vortices.

Ocean. See Dijk, Evert van: Over den oceaan, onze oost-west vlucht Europa-Amerika, met talrijke foto's van den tocht; inleiding van A.H.G. Fokker; voorwoord van Kingsford Smith.

«- See Italy: De eskader-oceaanvlucht der Italianen.

- See Orlovius, Heinz: Deutsche Tränsozeanplane.

Oehmichen. L'hélicostat Oehmichen.

L'Aérophile, 39e année, No. 10 (15 oct. 1931), Paris, pp. 308-311, ills.

- De Oehmichen helicostat.

flet Vliegveld, 15de Jaarg., No. 6 (Juni 1931), Amsterdam, pp. 213-214, ills.

Österreichischen Aëro-Club. 30 jähre Österreichischer Aéro-Club 1901-31. Wien, Verlag des Österreichischer Aero-Club, 1931, pp. 199, ills.

Oestrich, Hermann. Die Aussichten des Strahlantriebs für Flugzeuge unter besonderer Berücksichtigung des Abgas-Strahlantriebs.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 316-328, ills., diagrs.

- Theoretische Untersuchung über die Möglichkeiten des Nachladeverfahrens als Mittel zur Aufrechterhaltung der Leistung von Viertakt-Motoren in grösseren Höhen.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 337-342, ill., diagrs., tabls.

- Untersuchung eines Flugmotoren-Geblases, Bauart Argus-Roots.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 329-336, ills, diagrs.

Oils. Aviation engine oil.

Air Corps Information Circular, Vol. 7, No. 661 (Aug. 25, 1931), Washington, United States Government Printing Office, 1931, pp. 2. Air Corps Technical Report No. 3493.

Oils. See King, R. 0., and H. Moss: Detonation, mineral lubricating oils and blended fuels.

- See Wright, Milton: Flying to find oil.

- See Yamaguchi, Bunnosuke: Action of antioxygens in the oxidation of

unsaturated fatty oils.

Oldeeman, Howard C. Trouble shooting on aviation engines. Detroit, Aidas Printing Co., 1931, pp. 15.

Oleo strut. Dynamic test of long stroke oleo strut with compensating valve.

Air Corps Information Circular, Vol. 7, No. 658 (April 1, 1931), Washington, united States Government Printing Office, 1931, pp. 3, diagrs. Air Corps Technical Report No. 3352.

Olshevsky, Dimitry. A machine for automatic generation of airfoils.

Physical Review, Vol. 37, No. 4 (Feb. 15, 1931), Minneapolis, pp. 401-404, ills.

Olshevsky, Dimitry E. A new vertical wind tunnel.

Aero Digest, Vol. 18, No. 1 (Jan. 1931), New York, pp. 54-55, ills.

Olszewski, Stanislaw. Dynamometr powietrzny Heenan-Fell zainstalowany w Stacji Silnikowej I.B.T.L.

Instytut Badan Technicznych Lotnictwa, Sprawozdanie kwartalne Nr. 4, Warszawa, 1930, pp. 28-30, ills., diagr.

- See Peter, Franciszek, Stanislaw Olszewski, Jozef Dziewonski, i Hubert

Krasiñski: Badania nad zastosowaniem mieszanki alkoholowej do silnika Lorraine-Dietrich 450 KM.

O'Meara, J. K. (Jack). The 1931 Rhoen soaring contest at the Wasserkuppe. Aero Digest, Vol. 19, No. 4 (Oct. 1931), New York, pp. 48-49, 120, ills.

Oranges, L. C. Profits from a small-city airport.

Airport Section, Western Flying, Vol. 9, No. 3 (March 1931), Los Angeles, Calif., pp. 87-88, ill.

Ord, J. Garesché. Cooperative training for air and ground troops.

U.S. Air Services, Vol. 16, No. 4 (April 1931) »Washington, pp. 18, 20-22.

Oregon. Oregon aeronautic laws regulating flying and registering aviators. Salem, Published by the Oregon State Board of Aeronautics, 1931, pp. 15.

Oregon trail. See Johnson, Robert: The new "Oregon trail."

Orientation. See Ebert: Ortsbezeichnung zur Luft-orientierung.

Orlovius, Heinz. Deutsche Transozeanpläne.

Luftschau, 4, Jahrg., Nr. 11 (10. Juni 1931), Berlin, p. 86.

- See Supf, Peter, und Heinz Orlovius: Die Welt der Flieger.

Ormerod, A. Full scale measurements of lift coefficients of a Bristol fighter with R.A.F. 34 wings and slots.

Aer. Res. Comm., Rep. Mem., No. 1351, (Ae. 482-T. 3012), September 1930, London, 1931, pp. 9, ills., diagrs., tabls.

- See Jennings, W. G., and A. Ormerod: Full scale experiments on high tip

speed airscrews. The effect of thickness of section on airscrew performance

Orozco, I. G. Estereofotogrametria terrestre operaciones de campo. Reconocimiento, elección, localización y orientación de las bases. Bases dobles o combinadas. Trabajos en una estación.

Ingeniera, Vol. 5, No. 6 (junio 1931), Mexico, pp. 203-211.

Orr, George W. Flying instruction as it should be.

Scient. Amer., Vol. 145, No. 3 (Sept. 1931), New York, pp. 160-162, ills.

Orr, James. Several cases of non-circular torsion solved by analysis and direct test.

Aer. Res. Comm., Rep. Mem., No. 1393 (Ae. 514-T. 3003), September 1930, London, 1931, pp. 21, ills., diagrs., tabls.

Orsatti, Louis A. See Henderson, John C., and Louis A. Orsatti: Official miniature aircraft instruction manual, written for Los Angeles Times—Playground Aircraft League.

Osborn, Robert R. Buffalo plant of Curtiss Aeroplane & Motor Co. u.S. Air Services, Vol. 16, No. 6 (June 1931), Washington, pp. 36-38, ills.

Oscillations. See Capetti, A.: Sul calcólo dei periodi di oscillazione torsionale libera degli alberi.

- See Parker, A. E.: Wing oscillation.

Osswald, Emmy. Zur rationalisierung der innerdeutschen handelsluftfahrt. Heildelberg, Weiss, 1930, pp. 95.

Heidelberger Studien aus dem Institut fur Sozial und Staatswissenschaften, Bd. 1, Heft 1.

Osterhout, Howard. The doctrine of res ipsa loquitur as applied to aviation. Air Law Review, Vol. 2, No. 1 (Jan. 1931), New York, pp. 9-28.

Ott, Joseph S. Model airplanes; building and flying.

Chicago, The Goodheart-Willcox Company, inc., 1931, pp. xiv, 358, ills., diagrs.

Ower, E. A micromanometer of high sensitivity.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 1353-1359, diagrs. Rep. Mem. No. 1308 (Ae. 448).

- See Nayler, J. L., and E. Ower: Aviation of to-day; its history and development; with a chapter on aircraft engines by W. J. Stern.

Ower, E., and C. T. Hutton. The drag of small streamline bodies.

Aer. Res. Comm., Rep. Mem., No. 1409 (Ae. 530-T. 3135), June 1931, London, 1931, pp. 7, diagrs., tabls.

- Interference of a streamline nacelle on a monoplane wing.

Aer. Res. Comm., Rep. Mem., No. 1395 (Ae. 516-T. 3038 and "a"), December 1930, London, 1931, pp. 17, ill., diagrs., tabls.

- Investigation of the boundary layers and the drags of two streamline

bodies.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, pp. 205-223, ills., diagrs., tabls. Rep. Mem. No. 1271 (Ae. 417).

Oxford University. Oxford University air squadron.

Flight, No. 1180, Vol. 23, No. 32 (Aug. 7, 1931), London, pp. 784-787, ills.

Oxidation. See Mardles, R.: Oxidation characteristics of fuel vapours with regard to engine detonation.

Oxygen. See Binnie, A. M.: The influence of oxygen on corrosion fatigue.

Ozone. See Dobson, G. M. B.: Ozone in the upper atmosphere and its relation to meteorology.

p

P. De ontvangst van Van Tijen.

Het Vliegveld, 15de Jaarg., No. 4 (April 1931), Amsterdam, pp. 116-117, ills.

P.B. See Deviators: P.B. Deviators. A new type of instrument showing deviation from set course in all directions.

Pabst, Wilhelm. Landing impact of seaplanes.

National Advisory Committee for Aeronautics, Technical Memorandums No. 624, June 11, 1931, Washington, June 1931, pp. 29, ills., diagrs., tabls.

- Über den Landestoss von Seeflugzeugen.

Zeitschr. Flugt. Motorluftschr., 22. Jahrg., 1. Heft (14. Jan. 1931), München und Berlin, pp. 13-28, ills., tabls., diagrs.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 43-58, ills., diagrs., tabls.

Pacific. See Standard Oil Company of California: Landing fields of the Pacific west.

Page, Victor W. Aviation engine examiner.

New York, Norman W. Henley Publishing Co., 1931, pp. 440, ills.

Palastine. Palästina. Verordnung.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 13-14 (4. April 1931), Berlin, p. 92.

Palermo. See Bolla, Filippo: La frequenza del vento al suolo e a quote a Palermo.

Palumbo, Luisa. Meteorologia e navigazione aerea.

Riv. Aer., Anno 7, N. 6 (giugno 1931), Roma, pp. 488-493, ills.

Pan America. See Duke, Donald: Procedure and personnel of the Pan American airways system.

- See Latin America.

- See Rochford, Daniel: Twenty thousand memorable miles over Pan

American skyways.

Panana. La flotte Américaine et la défense aéronavale de Panama. L'Illustration, 89e année, No. 4593 (14 mars 1931), Paris, p. 308, ill.

Panama Canal. See United States Department of State: Regulations to govern air navigation in the Canal Zone. Promulgated by the Secretary of State. September 22, 1931.

Parachutes. Het Aviolanda-Robur valscherm.

Het Vliegveld, 15de Jaarg., No. 7 (Juli 1931), Amsterdam, pp. 240-241, ills.

- On parachutes.

Aeroplane, Vol. 40, No. 20 (May 20,1931), London, p. 934.

- Le parachute "Salvator."

Roma, anon. Innovaz. aeronautiche (tip. C. Colombo), 1930, pp. 48.

- Le rallye-parachute féminin.

L'Illustration, 89e année, No. 4607 (20 juin 1931), Paris, p. 299, ill.

- Safety parachute for airplane.

United States Daily, Tuesday, June June 23, 1931, Washington, D.C., p. 4, ill.

- What's next in chutes.

Western Flying, Vol. 10, No. 6 (Dec. 1931), Los Angeles, Cal., p. 29.

- See Appel, Wm. D., and R. K. Worner: An investigation of cotton for

parachute cloth.

- See Diard, Ennemonde: Coups d'ailes de l'oiseau à l'avoin. Préface de

M. Laurent Eynac, Ministre de l'Air.

- See Ducout, Marcel-S.: Le rallye-parachutes de l'Aéro-club.

Parachutes. See Flying: Fallschirm, Flugzeug, Zeppelin.

- See Freri, Prospero: L'impiego del paracadute nelle guerre future.

- See Great Britian. Air Ministry: Parachute manual.

- See Hegener, Henri: Uit de valschermwereld.

- See Irvin: The Irvin air chute.

- See Irvin: Some Irvin airchute statistics.

- See Irving Air chute Co., inc., and Floyd Smith Aerial Equipment Co.:

Claims of patents for parachute are adjudged valid and infringed.

- See K., A.: A convenient parachute attachment.

- See K., A.: Photography during a parachute jump.

- See Robur: Den Svenska fallskärmen "Robur."

- See Stanley, Charles M.: Modern parachutes.

- See Steiner, Hans: Der fallschirm als rettungsmittel, zum lastenabwurf

und seine Verwendung als flugzeugsicherung.

- See Stryk, Heinrich von: Rigging lines for parachutes. A suggested

alternative to silk or hemp.

- See United States Department of Commerce. Aeronautics Branch:

Parachute supplement. Air commerce regulations. Effective July 1, 1930.

- See White, Bert: 27,000 feet down.—By chute.

Paris. Die Internationale Luftfahrtausstellung in Paris, November bis Dezember 1930.

Zeitschr. Ver. deutscher Ing., Bd. 75, Nr. 16 (18. April 1931), Berlin, pp. 473-480, ills.

- De luchtvaart-salon te Parijs.

Het Vliegveld, 15de Jaarg., No. 1 (Jan. 1931), Amsterdam, pp. 28-31, ills.

- See Christian, Manfred: Rückblick auf die Motorenschau des 12.

Pariser Salons, Dezember 1930.

- See Cooper, Mabel C: An early bird goes to Paris.

- See Lamarche, Paul E.: The Paris Salon de 1'Aviation.

- See Marolles, R. J. de: The twelfth Paris aero show.

- See Pollard, H. J.: The Paris aero show, 1930.

- See Swan, Andrew: The progress of aero engine design at the Paris show.

Parker, A. E. Horsepower at speed of sound.

Aircraft Engineer, Flight Engineering Section, Suppl. to No. 1187, Vol. 23, No. 39 (Sept. 25, 1931), London, pp. 970d-970f, (68-70), diagrs.

- Wing oscillation.

Aircraft Engineer, Flight Enginering Section, Suppl. to No. 1196, Vol. 23, No. 48 (Nov. 27, 1931), London, pp. 1174a-1174c, (81-83), diagrs.

Parkinson, H. Strut fairing.

Aircraft Engineer, Flight Engineering Section, Suppl. to No. 1196, Vol. 23, No. 48 (Nov. 27, 1931), London, pp. 1174d-1174e, (84-85), diagrs.

Parkinson, Leslie R. Technical description of the Jacobs L-3 aircraft engine.

Aviation Engineering, Vol. 5, No. 5 (Dec. 1931), Washington, N.J., pp. 23-25, ills., diagr., tabi.

Parnall. The Parnall Parasol monoplane.

Flight, No. 1164, Vol. 23, No. 16 (April 17,1931), London, pp. 329-331, ills.

Parrott, R. J. Air Force training. Some constructional considerations of the ideal military training aeroplane.

Flight, No. 1175, Vol. 23, No. 27 (July 3,1931), London, pp. xxxxi-xxxv, ills.

- Some constructional considerations of the ideal military training aeroplane.

Aeroplane, Vol. 41, No. 1 (July 1,1931), London, pp. 44-45, ills.

Parseval, August von. Major a. D. August von Parseval.

Die Umschau, 35. Jahrg., Heft 5 (31. Jan. 1931), Frankfurt, a.M., p. 98, port.

Pascale, Renato. La cooperazione aereo-terrestre. La defesa antiaerea. Bologna, tip. P. Neri, 1931, pp. 28.

Pasqualini, Clodoveo. La resistenza dell'aria per corpi sferici rotanti a velocità prossima a quella del suono.

Riv. Aer., Anno 7, N. 3 (marzo 1931), Roma, pp. 443-457, ills, diagrs.

Patents. Patent digest; abridgments of current U.S. airplane patents. Vol. 1. Jan. 15, 1930.

New York, Manufacturers Aircraft Association, inc., 1930, diagrs. Semimonthly.

Paterson, Huntley. See Treusch von Buttlar-Brandenfels, Horst: Zeppelins over England. Translated from the German by Huntley Paterson.

Paterson, Robert. Safety.

Western Flying, Vol. 9, No. 6 (June 1931), Los Angeles, Cai., pp. 37-38, diagrs.

Patrick trophy. See Richardson, Phil: Lieut. Westley wins Patrick trophy race.

Patterson, H. S. See Whytlaw-Gray, R., and H. S. Patterson: Smoke. A study of aerial disperse systems.

Patterson, John McClure. At the famous Wasserkuppe.

Nat. Aer. Mag., Vol. 9, No. 11 (Nov. 1931), Washington, pp. 6-11, ills.

Pearson, John B. Materials in 1930.

Airway Age, Vol. 12, No. 1 (Jan. 1931), New York, pp. 40-43, ills.

Peck, William Cecil. Dynamic and flight tests on rubber-cord and oleo-rubber-disk landing gears for an F6C-4 airplane.

National Advisory Committee for Aeronautics, Report No. 366, Feb. 16, 1931, Washington, U.S. Government Printing Office, 1930 [1931], pp. 19, ills., diagrs., tabls.

Peck, William Cecil, and Albert P. Beard. Static, drop, and flight tests on Musselman type airwhéels.

National Advisory Committee for Aeronautics, Report No. 381, June 26, 1931, Washington, U.S. Government Printing Office, 1931, pp. 20, ills., diagrs., tabls.

Pecker, J. S. Autogyro rotor system.

Automotive Ind., Vol. 64, No. 19 (May 9,1931), New York, pp. 732-734.

Pendulum. See Syóyama, Mituo: A method of laboratory device to record the period of a pendulum motion.

Penn, R. J. See Kerr, P. S.: Fuel flowmeters designed to measure mass flow.

Pennsylvania. See Turner, Ellwood, J.: Resumé of experience of Pennsylvania in state regulation.

Pensacola, Florida. See Studley, Barrett: Learning to fly for the Navy.

Pèpe, Paul. Précis d'hydraviation; cours de l'École Technique d'Aéronautique et de Construction Automobile. Préface de François Denhaut. Paris, F.-L. Vivien, 1931, 2 vols., ills., diagrs.

Performance. See Fairbanks, Andrew J.: Aeroplane performance prediction. A description of an empirical chart from which approximate characteristics may be estimated.

- See Jennings, W. G.: The effect of span on aircraft performance.

- See Maitland, C. E., and A. E. Woodward Nutt: Flight tests on the variation of the range of an aircraft with speed and height.

- See Mokrzycki, Gustaw Andrzej: Pomiar spólczynników wyczynów.

- See Perring, W. G. A., and C. Callen: Moments and forces on a yawed

model aeroplane.

- See Spencer, K. T.: On the effect of altitude upon the distance required

for an aircraft to take off and climb 20 meters giving generalised curves of weight reduction necessary if a given aircraft is to comply with the requirements of A.P. 1208 under adverse atmospheric conditions.

- See Stevens, H. L., and A. E. Woodward Nutt: Charts for aircraft performance reduction.

Perring, W. G. A., and C. Callen. The influence of a stopped airscrew on the lift and drag of an aerofoil.

Aer. Res. Comm., Rep. Mem., No. 1347, (Ae. 479—T. 2992), May 1930, London, 1931, pp. 7, ills., diagrs., tabls.

- Moments and forces on a yawed model aeroplane.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 528-530, diagrs., tabls. Rep. Mem. No. 1319. (Ae. 455.)

——■ Validity of large scale tests in an open jet wind tunnel.

Aer. Res. Comm., Rep. Mem. No. 1348, (Ae. 480—T. 2994), July 1930, London, 1931, pp. 12, ills., diagrs., tabls.

Perring, W. G. A. Wind tunnel tests on a symmetrical aerofoil (Gôttingen 429 section).

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 341-344, diagrs., tabls. Rep. Mem. No. 1243 (Ae. 398.)

- See Bradfield, F. B., and W. G. A. Perring: Drag tests on a large model

in a small tunnel.

- See Douglas, G. P., W. G. A. Perring, and R. A. Fairthorne: Wind tunnel

tests with high tip speed airscrews. Experimental investigation of blade twist load.

- See Wood, R. McKinnon, and W. G. A. Perring: Stresses and strains in

airscrews with particular reference to twist.

Peru. Commercial aviation in Peru.

Flight, No. Í198, Vol. 23, No. 50 (Dec. 11,1931), London, p. 1216.

Pescara. Ensayos del helicóptero Pescara en Barcelona.

Ibérica, Año 18, Núm. 862 (24 enero 1931), Barcelona, pp. 49-54, ills.

- See Pouit, R.: Un hélicoptère de 40 HP; le Pescara 4 S.

Peter, Franciszek, Stanislaw Olszewski, Jözef Dziewonski i Hubert Krasinski. Badania nad zastosowaniem mieszanki alkoholowej do silnika Lorraine-Dietrich 450 KM.

Instytut Badan Technicznych Lotnictwa, Sprawozdanie, Bulletin No. 6 (Nr. 28), Warzawa, 1931, pp. 33-74.

Peters, H. Druckmessung.

Wien, W., und F. Harms: Handbuch der Experimentalphysik, Bd. 4, 1. Teil. Hydro- und aerodynamik, Leipzig, Akademische Verlagsgesellschaft m.b.H., 1931, pp. 487-510, ills.

- Effect of viscosity in speed measurements with double-throat yenturi

tubes.

National Advisory Committee for Aeronautics, Technical Memorandums No. 633, Aug; 13, 1931, Washington, August 1931, pp. 5, diagrs.

- Einfluss der Zähigkeit bei Geschwindigkeitsmessungen mit Staudruckmultiplikatoren. (Bruhnsche Venturi-Doppeldüse.)

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 11. Heft (15. Juni 1931), München und Berlin, pp. 321-323, ill., diagrs.

- See Mueller, H., and H. Peters: Geschwindigkeits- und Mengenmessungen von Flüssigkeiten.

Petersen, Carl 0. Med Byrd og Baichen mot Sydpolen . . .

Oslo, 1931.

Petersohn, E. Abwindmessungen hinter Tragflügeln mit abgerissener Strömung.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 10. Heft (28. Mai 1931), München und Berlin, pp. 289-300, ills., diagrs.

- Downwash measurements behind wings with detached flow.

National Advisory Committee for Aeronautics, Technical Memorandums, No. 632, Aug. 6, 1931, Washington, August 1931, pp. 6, ills., diagrs.

Petschow, Robert. Freiballonsport.

Luftschau, 4. Jahrg., Nr. 11 (10. Juni 1931), Berlin, p. 85, ills.

Pfister, E., und H. Eschke. Der bau des Flugzeuges. Heft III. Der Rumpf.

Berlin-Charlottenburg, Verlag C. J. E. Volkmann, 1930, pp. 62, ills.

Philippine Islands. See Selga, Miguel: The velocity of the wind at Manila, Baguio, Iloilo and Cebu.

Philifpovich, Alexander v. Der jetzige Stand der Prüfung von Flugmotorenkraftstoffen.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 2. 3. Heft (28 Jan. 14. Feb. 1931), München und Berlin, pp. 47-49, 80-84, diagrs. Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 542-548, diagrs., tabls.

--Vergleichende motorische Untersuchung von Kraftstoffen.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 549-566. diagrs.. tabls.

Philipson, Filippo. La soluzione di un problema classico.

Riv. Aer., Anno 7, N. 2 (feb. 1931), Roma, pp. 272-281, ills. Halicopters.

Photogrammetry. Macchina aerofotogrammetrica multipla della ditta photo-grammetrie GmbH.

Riv. Aer., Anno 7, N. 11 (nov. 1931), Roma, pp. 375-380, ills.

- See Baeschlin, F.: Internationales Archiv für Photogrammetrie.

- See Cassinis, G.: Ricerche sul metodo aerofotogrammetrico Nistri.

Photogrammetry. See Grüber, O. v.: Traité de photogrammétrie aérienne et terrestre.

- See Lacmann, Otto: Fortschritte auf dem Gebiete der Photogrammétrie.

--See Società Anonima Rilevamenti Aerofotogrammetrici. Rome: Il metodi

aerofotogrammetrico "Nistri" e le sue—pratiche applicazioni.

- See Soriano y Viguera, J.: La moderna fotogrametría automática.

Photography. Air photography.

London, His Magesty's Stationery Office.

- Apparato aerofotografico K-10.

Riv. Aer., Anno 7, N. 1 (gen. 1931), Roma, p. 163, ill.

- Photographie aérienne à grande distance avec image de lointains invisibles

à l'oeil.

L'Aéronautique, 13me année, No. 142 (mars 1931), Paris, p. 78, map.

- See Askania: L'enregistreur photographique de trajectoires Askania.

- See Church, Earl Frank: Methods of eliminating ground surveying for

control in aerial photographic mapping.

- See Coppellotti, Celestino: Designazione dei bersagli e fotografìe dall'aeroplano.

- See Coppellotti, Celestino: Fotografie dall'aeroplano: La scala e

l'orientamento.

- See Eagle: A new eagle camera.

- See Great Britain: La fotografìa aerea nell'aviazione britannica.

- See Gutkowski, Tadeusz: Metoda okreálenia mnoznika oáwietlenia przy

uzyciu filtrów barwnych w fotograji lotnicej.

- See Gutkowski, Tadeusz: Wplyw gruboáci ziarna emulsji fotograficznej

na budowe. aparatu fotolotniczego.

- See Hotine, Martin: The Fourcade stereogoniometer.

- See Hotine, Martin: Surveying from air photographs.

- See K., A.: Photography during a parachute jump.

- See Lacmann, Otto: Die neue Startmesskammer System DVL-Zeiss.

- See Moraczewska, Marja: Doczulanie emulsyj krajowych na czerwieñ i

prodczerwieú.

- See Moraczewska, Marja, i Wlodzimierz Daniewski: O oáwietleniu ciemni

fotograficznej.

- See Roussilhe, H.: Emploi de la photographie aérienne aux levers topographiques à grande échelle.

- See Schmieschek, Ulrich: HyperSensibilisierung optisch sensibilisierter

Emulsionen und optische Sensibilisierung hypersensibilisierter Emulsionen.

--See Schmieschek, Ulrich: Versuche zur Steigerung der Haltbarkeit hypersensibilisierter Emulsionen.

- See Steewen, O. P.: van: Von der photographischen Flinte zum kinemato-

graphischen Maschinengewehr.

69261—35-15

Photography. See Wood, Edward S., Jr.: Sell Obliques.

- See Zanetti, M., and C. Avarello: Manuale del fotógrafo d'aeronautica.

Photometric tunnels. See Jacobs, A. M.: Photometric tunnel at Wright Field.

Piaggio. L'S 55 metallico.

L'Aerotécnica, Vol. 11, Nos. 6-7 (giug.-lugl. 1931), Roma, pp. 584-861, ills. English abstract 896.

Piccard, Auguste. L'ascension du professeur Piccard.

L'Aérophile, 39e année, No. 7 (15 juil. 1931), Paris, pp. 195-196, ills.

—— Der Höhenballon von Professor Piccard.

Luftschau, 4. Jahrg., Nr. 6 (24 März 1931), Berlin, p. 46, ill.

- Le livre de bord du professeur Piccard.

L'Aérophile, 39e année, No. 8 (15 août 1931), Paris, pp. 244-247.

- Met professor Piccard naar de stratosfeer.

Het Vliegveld, 15de Jaarg., No. 6 (Juni 1931), Amsterdam, pp. 211-213, ills.

- Le record d'altitude battu par un ballon.

L'Aéroneutique, 13me année, No. 146 (juil. 1931), Paris, 237, ill.

- See H., H.: Professor Piccard over zijn hoogtevaart. Gevangenen der

stratosfeer.

--See Neue Augsburger Zeitung: Professor Piccards forschungsflug in

die Stratosphäre; verlauf des stratosphärenfluges und dessen wissenschaftliches ergebnis.

Piccard, Auguste, y Paul Kipfer. Tentativas del profesor Piccard y otros esfuerzos para el conocimiento de la estratosfera

Ibérica, Año 181, Núm. 884 (11 julio 1931), Barcelona, pp. 34-38, ills., ports.

Pickett, Charles. The Empire State building mooring mast.

Air Law Review, Vol. 2, No. 2 (April 1931), New York, pp. 130-152.

Pierce, Maurice Rumford. See United States Hydrographie Office: Position tables for aerial and surface navigation.

Piercy, N. A. V. Aerodynamics for engineers. IV. Elliptic loading—channel corrections—downwash—viscous motion and boundary-layer theory. V. Aeroplane performance in normal flight—other steady motions—elements of air-screw theory. VI. An introduction to the study of aeroplane stability with a section on control.

Aircraft Engineering, Vol. 3, Nos. 23-25 (Jan.-March 1931), London, pp. 15-18, 43-46, 67-69, 75, ills., diagrs.

--The fifth air congress. The report of the papers read and discussions

during the proceedings at the Hague.

Aircraft Engineering, Vol. 3, No. 31 (Sept. 1931), London, p. 220.

- The present position in aeronautics.

Journ. Roy. Soc. Arts, Vol. 79, Nos. 4112-4114 (Sept. 11, 18, 25, 1931), London, pp. 911-925, 929-941, ills., diagrs.

Piersol, James V. Adapting the airplane to the newspaper. A report covering an experiment conducted by the Detroit News.

Aero Digest, Vol. 18, No. 1 (Jan. 1931), New York, pp. 35-39, 122, ills.

Pillard, M. L'hélice "roue-libre" Paulhan-Pillard pour l'amélioration du vol avec moteur arrêté.

L'Aéronautique, 13me année, No. 146, Bulletin L'Aérotechnique, 9e année, No. 103 (juil. 1931), Paris, pp. 245-252, ills., diagrs., tabls.

Piloting. Manuel of air pilotage.

London, His Majesty's Stationery Office,

- Practical flying for amateurs.

London, Published for the proprietors of Shell by Simkin Marshall, ltd., 1931, pp. 165, Ills.

- See Amateurs: Practical flying for amateurs.

- See Barnard, Charles Douglas: Barnard on learning to fly.

- See Bowen, Robert Sidney: Flying from the ground up.

- See Hope, W. Lawrence, and Norman W. Kennedy: A complete course for

the commercial flying license.

- See Lainé, André, et G. Guet: Comment devenir aviateur; formalités à

remplir—examens à passer—écoles à choisir—les principes de pilotage.

- See Mills, P. W. F.: Angles on practical flying.

- See Sandberg, G.: Uit de praktijk van het vliegen.

Pilots. Pilots handbook 1931—written, compiled, edited and published by Pilots Handbook Publishing Co.

Los Angeles, California, 1931, ills., maps, diagrs.

- See Chase, John Samson, and Nolie Mumey: Physical requirements for

commercial flyers.

- See United States Department of the Navy: Syllabus for the training of

student naval aviators and student naval aviation pilots.

Pine. See Kozanecki, Stefan: Badania éwierka górskiego z Worochty.

Pinkerton, Robert M. Effect of nose shape on the characteristics of symmetrical airfoils.

National Advisory Committee for Aeronautics, Technical Notes No. 386, Aug. 14, 1931, Washington, August 1931, pp. 16, diagrs., tabls.

- See Jacobs, Eastman N., and Robert M. Pinkerton: Tests of N.A.C.A.

airfoils in the variable-density wind tunnel.

Pinna, Pietro. L'aviazione in montagna.

Riv. Aer., Anno 7, N. 1 (gen. 1931), Roma, pp. 1-15.

Pioneer Instrument Company. See Wobblemeter: The "Wobblemeter." A new device for measuring human fatigue.

Pippard, A. J. Sutton, and W. E. Francis. The stresses in a radially spoked wire wheel under loads applied to the rim.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 685-727, ill., diagrs., tabls. Rep. Mem. No. 1302 (Ae. 445).

- Stresses in wired wheels.

Philosophical Magazine, Vol. 11, No. 69 (Feb. 1931), London, pp. 233-283.

Piqué. See Cochercano, Jean: Note sur le vol en piqué des avions.

PiRATH, Carl. Die luftverkehrswirtschaft in Europa und in den Vereinigten Staaten von America.

München und Berlin, Verlag R. Oldenbourg, 1931, pp. 105, ills.

PiROZzi, Alfonso. L'utilizzazione economica delle linee aeree e la cooperazione del velivolo cogli altri mezzi de trasporto.

Riv. Aer., Voi. 7, N. 1 (gen. 1931), Roma, pp. 49-57.

Pistolesi, E. Il calcolo approssimato del biplano indefinito.

L'Aerotecnica, Vol. 11, N. 12 (die. 1931), Roma, pp. 1506-1517, diagrs.

- Considerazioni sul funzionamento dell'elica con tubo addizionale.

L'Aerotecnica, Voi. 11, N. 4 (aprile 1931), Roma, pp. 419-423, ills. English abstract pp. 502-503.

- Correnti e azioni dinamiche a velocità molto elevate.

L'Aerotecnica, Voi. 11, N.6-7 (giugno-luglio 1931), Roma, pp. 701-729, ills., diagrs. English abstract, pp. 892-893.

Piston rings. Piston rings in the making.

Flight, No. 1195, Vol. 23, No. 47 (Nov. 20, 1931), London, pp. 1157-1158, ills.

Pitcairn, Harold. A defence of the autogiro.

Aeroplane, Vol. 41, No. 22 (Nov. 25, 1931), London, pp. 1228-1230.

Pitcairn, Harold F. Autorotation.

Western Flying, Vol. 10, No. 6 (Dec. 1931), Los Angeles, Calif., pp. 25-26, ills.

Pitman, Ernest. A docking device for airships.

Flight, No. 1164, Vol. 23, No. 16 (April 17, 1931), London, pp. 343-344, ill.

Pittsburgh. See Johnson, Charles P.: Pittsburgh city-county airport.

Planetabling. See Miller, O. M.: Planetabling from the air.

Plates. See Sezawa, Katsutada: On the lateral vebration of a rectangular plate clamped at four edges.

Plath, Erich. Eindrücke vom 12. Segelflugwettbewerb auf der Rhön. Zeitschr. Ver. Deutscher Ing., Bd. 75, Nr. 49 (5. Dez. 1931), Berlin, p. 1491.

Pleines, Wilhelm. Flugmessungen über den Einfluss von Handley-Page-Schlitzquerrudern auf Eigenschaften und Leistungen eines Flugzeuges vom Muster Albatros L 75-Ass im Höchstauftriebsbereich.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 691-708, ills., diagrs., tabls.

- Die Flugzeugmuster des "Deutschlandflug 1931."

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 24. Heft (28. Dez. 1931), München und Berlin, pp. 713-717, ills.

- Nietverfahren im Metall-Flugzeugnau.

Hauszeit, der VA.W. u.d. Elftwerk A. Q. fuer Aluminium, Vol. 3, No. 4-6, (April-June 1931), pp. 166-173, ils.

Plendl, Hans. Über den Einfluss der elfjährigen Sonnentätigkeitsperiode auf die Ausbreitung der Wellen in der drahtlosen Telegraphic

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 665-671, diagrs.

- See Krüger, Kurt, und Hans Plendl: Horizontale Strahlungskennlinie einer

Kurzwellen-Richtantenne mit gespeistem Reflektor.

Pobjoy. A new Pobjoy engine.

Flight, No. 1162, Vol. 23, No. 14 (April 3,1931), London, p. 292, ills.

- The Pobjoy "R" type engines.

Flight, No. 1171, Vol. 23, No. 23 (June 5, 1931), London, pp. 496-498, ills.

Poggi, L. Azioni aerodinamiche parallele al movimento su di un'ala piana animata da moto traslatorio uniforme e da moto oscillatorio.

L'Aerotecnica, Voi. 11, N. 6-7 (giug.-lugl. 1931), Roma, pp. 767-779, diagrs., tabls. English abstract pp. 895-896.

Poggi, L. Sul peso delle ali a sbalzo.

L'Aerotecnica, Vol. 11, N. 12 (die. 1931), Roma, pp. 1518-153S, diagrs.

- Sulla variazione de apportarsi ai resultati delle esperienze eseguite al tunnel

aerodinamico su di un modello alare.

L'Aerotecnica, Voi. 11, N. 4 (aprile 1931), Roma, pp. 424-445, diagrs., tabls. English abstract, pp. 503-504.

Polack. See Gutkowski, Tadeusz: Teorja akomodacji barwnej oka, zaobserwo-wanej przez prof. Polack'a.

Poland. Polish P type single-seat fighters. All-metal Gull-type wing monoplane.

National Advisory Committee for Aeronautics, Aircraft Circulars No. 137, March 3, 1931, Washington, March 1931, pp. 10, ills.

Polar exploration. See Andrée: De pooltocht van Andrée.

- See Derstroff, Hanns: Die polarfahrt des "Graf Zeppelin." "SOS Nautilus" kein "Stop Zeppelin."

- See Moltschanoff, P.: Polarfahrt im Nebel. Wolkenstudien während der

Polarfahrt des Luftschiffs "Graf Zeppelin."

Polesine, Jotti da Badia. Il motore a vapore ed il suo impiego in aeronautica. L'Aerotecnica, Voi. 11, N. 12 (die. 1931), Roma, pp. 1555-1561, ills.

Police. See Allen, C. B.: Aerial police of New York City.

- See Roth, B.: Air branch of New York state police.

Pollard, H. J. The Paris aero show, 1930.

Aircraft Engineer, Flight Engineering Section, Suppl. to No. 1173, 1157, Vol. 23, No. 5, 9 (Jan. 30, Feb. 27, 1931), London, pp. 96a-96d (1-4), 184a-184d (9-12), ills.

Pollock, Robert E. What to do about motorless flight.

Western Flying, Vol. 9, No. 5 (May 1931), Los Angeles, Calif., p. 34.

Poncin, Henri. Hydrodynamique.—Sur le mouvement d'un fluide autour d'une cavitation.

C. R. Acad. Sci., T. 193, No. 13 (28 sept. 1931), Paris, pp. 481-482.

Porto Rico. See Taylor, H. W.: Mapping Porto Rico from the sky.

Portugal. Verordnung.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 45-46 (14. Nov. 1931), Berlin, pp. 334-335.

Post, Wiley, and Harold Gatty. Around the world in eight days; the flight of the Winnie Mae. Introduction by Will Rogers.

New York, Chicago, Rand, McNally & Company 1931, pp. 304, ills.

Postal Service. See Mail.

Potez. Potez 37R2 military airplane. A two-place long-distance observation monoplane.

National Advisory Committee for Aeronautics, Aircraft Circulars No. 152, Sept. 30, 1931, Washington, September 1931, pp. 5, ills.

- Pròba ststyczna, samolotu Potez 27 A2 fìrmy "Podlaska Wytwórnia

Samolotów."

Instytut Badati Technicznych Lotnictwa, Sprawozdania i Prace, Warszawa, 1926, pp. 30-34, ills., diagrs.

Potez, Henry. Politique industrielle.

L'Aérophile, 39e année, No. 12 (15 dec. 1931), Paris, p. 353.

Potter, Leslie S. Compass swinging afloat.

Aero Digest, Vol. 19, No. 4 (Oct. 1931), New York, p. 51, diagrs.

- Compasses and their care.

Aero Digest, Vol. 18, No. 1 (Jan. 1931), New York, pp. 58-59, ills.

- Flying clubs in England.

Airway Age, Vol. 12, No. 10 (Jun. 6,1931), New York, pp. 565-567, ills.

- Navigation instruction in ground schools.

Aero Digest, Vol. 18, No. 5 (May 1931), New York, pp. 56,130, ill.

- The navigation of the air and meteorology.

New York and London, Harper & Brothers, 1931, pp. xvii, 233, ill., maps, diagrs. Foreword by Oapt. Sir Hubert Wilkins.

Pouit, R. Calcul de la vitesse d'atterrissage d'un avion à partir de ses caractéristiques aérodynamiques et de la vitesse verticale à l'atterrissage.

L'Aéronautique, 13me année, No. 150, Bulletin L'Aêrotechnique, 9e année, No, 107 (nov. 1931), Paris, pp. 385-386, diagrs.

- Un hélicoptère de 40 HP; le Pescara 4 S.

L'Aéronautique, 13me année, No. 143 (avril 1931), Paris, pp. 122-123, ills.

Pour le Mérite. See Schäffer, Ernst: Pour le Mérite. Flieger im Feuer.

Pownall, C. A. Better engines for Navy planes.

Scient. Amer., Vol. 145, No. 6 (Dec. 1931), New York, pp. 376-378, ills.

Prandtl, Ludwig. Effect of stabilizing forces of turbulence.

National Advisory Committee for Aeronautics, Technical Memorandums No. 625, June 18, 1931, Washington, June 1931, pp. 11, diagrs.

- Einführung in die Grundbegriffe der Strömungslehre.

Wien, W., und F. Harms: Handbuch der Exprimentalphysik, Bd. 4,1. Teil. Hydro- und aerodynamik, Leipzig, Akademische Verlagsgesellschaft m.b.H., 1931, pp. 1-41, ills.

- See Tietjens, O.: Hydro- und aeromechanik nach Vorlesungen von L.

Prandtl. Band 2: Bewegung reibender Flüssigkeiten und technische Anwendungen.

Prepositi, Clémente. La storia dell'aviazione. Vols. I, II, e III. Firenze, A. Vallecchi edit, tip., 1931, pp. 218; 199; 209, ill.

- La storia dell'aviazione.

Riv. Aer., Anno 7, N. 8 (agosto 1931), Roma, pp. 378-381.

Pressure. See Gough, Mel vin N.: The variation in pressure in the cabin of an airplane in flight.

- See Münk, Max Michael: The center of pressure. Article eight on the

principles of aerodynamics.

- See Peters, H.: Druckmessung.

- See Rhode, Richard V., and Eugene E. Lundquist: The pressure distribution over a modified elliptical wing tip on a biplane in flight.

- See Rhode, Richard V., and Eugene E. Lundquist: The pressure distribution over a square wing tip on a biplane in flight.

<- See Thorn, A.: The pressure on the front generator of a cylinder.

PRESSUREjcell. See Theodorsen, Theodore: Investigation of the diaphragm-type pressure cell.

Pressure distribution. See Rhode, Richard V., and Eugene E. Lundquist: Pressure distribution over the fuselage of a PW-9 pursuit airplane in flight.

Preston, H. E. Notes on design and construction of Gloster IV. 1927 Schneider Trophy racing seaplanes.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, 1931, pp. 312-317.

Preston, R. L. See Manning, W. O., and R. L. Preston: A register of civilian aircraft.

Pricolo, Francisco. Alcuni risultati delle grandi esercitazioni aeree del 1931. Riv. Aer., Anno 7, N. 10 (ott. 1931), Roma, pp. 34-43.

Prince of Wales. The Prince's home flight: The final stage of the historic flight.

Illustrated London News, Vol. 88, No. 2297 (May 2, 1931), London, p. 737, ill.

Pritchard, Robert J. Plane brokers.

Western Flying, Vol. 10, No. 3 (Sept. 1931), Los Angeles, Calif., pp. 20-22, ill.

Privateer. See Amphibian: A diminutive amphibian.

Probert, Richard J. When the auto dealer sells planes.

Western Flying, Vol. 9, No. 6 (June 1931), Los Angeles, Calif., pp. 35-36, 91.

Prochasson, Roger. Le risque de l'air. Preface de m. L. Lecornu. Paris, p. Bossuet, 1931, pp. 251.

Production. See Damon, R. S.: Airplane construction production methods.

- See Stimson, Thomas E., jr.: Team work in production.

Pröll, A. Notlandung von Landflugzeugen auf See.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 22. Heft (28. Nov. 1931), München und Berlin, p. 657.

- Start und Landung fahrgestelloser Flugzeuge.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 9. Heft (15. Mai 1931), München und Berlin, pp. 255-258, ills., tabls.

Progress. Technological progress in 1931. Aeronautics.

Mech. Eng., Vol. 53, No. 12 (Dec. 1931), New York, pp. 886-889.

- See American Society of Mechanical Engineers: Progress in aeronautics.

Contributed by the Aeronautics Division.

Projectiles. See Eberhard, O. v.: Ballistik.

- See Epstein, Paul S.: On the air resistance of projectiles.

Propellers. Balancing airplane propellers.

Scient. Amer., Vol. 144, No. 1 (Jan. 1931), New York, p. 51, ill.

- Calculation of airscrew characteristics.

Flight, No. 1156, Vol. 23, No. 8 (Feb. 20, 1931), London, pp. 168-169, diagrs.

- A flexible propeller hub.

Scient. Amer., Vol. 144, No. 2 (Feb. 1931), New York, p. 124, ill.

- Neues vom Holzpropeller.

Luftschau, 4. Jahrg., Nr. 4 (24. Feb. 1931), Berlin, p. 29.

- Variable pitch propeller.

Curtiss-Wright Review, Vol. 2, No. 2 (May 1931), New York, p. 16, ills.

- See Biechteler, Curt: Messung des Einflusses des Schraubenstrahls auf den

Ausschlag des Seitenruders im Geradeausflug.

Propellers. See Bonder, Juljan: Quelques remarques concernant les essais de l'hélice propulsive installée obliquement dans un courant d'air.

—— See Caldwell, Frank W.: Aspects of airscrew design.

- See Caldwell, Frank W.: Care of the detachable-blade, metal propeller.

- See Capon, R. S.: Part I.—A method of calculating suitable airscrew

characteristics to meet given conditions. The resulting airscrew performance. Part II.—A comparison of the observed change of performance consequent on a change of airscrew and the change predicted by the methods of Part I.

- See Columba, Fausto: L'elica a passo variabile.

--See Dorand, René: L'amélioration des hélices et leur calcul de resistance.

- See Douglas, G. P., W. G. A. Perring, and R. A. Fairthorne: Wind tunnel

tests with high tip speed airscrews. Experimental investigation of blade twist load.

—■— See Eula, Antonio: Sul calcolo del momento torcente aerodinamico agente sulle pale delle eliche.

—— See Faraboschi, Alberto: Esperimenti su eliche per tutti gli stadii di funzionamento e per diversi valori del rapporto passo diametro.

- See Flachsbart, O.: Luftschrauben.

- See Franz, G.: Der Voith-Schneider-Antrieb. Ein neuartiger Schiffspropeller.

- See Freeman, Hugh Barton: Comparison of full-scale propellers having

R.A.F.-6 and Clark Y airfoil sections.

- See Freeman, Hugh Barton: The effect of small angles of yaw and pitch on

the characteristics of airplane propellers.

- See Gastou, R.: L'hélice aérienne; à pas constant, à pas variable.

- See Glauert, H.: Airscrews for high speed aeroplanes.

- See Gloster: Static thrust tests of two airscrews on Gloster HIB No. N. 195,

- See Gloster: Tests of experimental airscrews on Gloster IIIA.

- See Grzeszcyk, Szczepan: Pomiary rozkladu risieri za émiglem.

- See Helicopters: Il velivolo-elicottero ad eliche orientabili.

- See Helmbold, H. B.: Goldstein's solution of the problem of the aircraft

propeller with a finite number of blades.

- See Helmbold, H. B.: Über die Goldsteinsche Lösung des Problems der

Luftschraube mit endlicher Flügerzahl.

- See Jennings, W. G.: Full scale experiments of high tip speed airscrews.

Comparative performance trials of three airscrews of different sections.

- See Jennings, W. G., and A. Ormerod: Full scale experiments on high tip

speed airscrews. The effect of thickness of section on airscrew performance.

- See Jones, E. T.: The distribution of pressure over a section of an airscrew

blade in flight, and the variation of lift coefficient with the speed of the section.

Propellers. £eeLock, C. N. H.,and H. Bateman: Airscrews at negative torque.

- See Lock, C. N. H.: The application of the theoretical velocity field round

a spheroid to calculate the performance of an airscrew near the nose of a streamline body.

- See Lock, C. N. H.: The effect of body interference on the efficiency of an

airscrew.

- See Lock, C. N. H., and A. R. Collar: Exploration of the flow near the

screw proposed for the N.P.L. compressed air tunnel.

- See Lock, C. N. H., and F. C. Johansen: Pressure plotting a streamline

body with tractor airscrew running. Part II.—Airscrew in the rear position.

- See Lynam, E.: Notes on the flutter of airscrew blades.

- See Marchetti: L'hélice a pas variable Marchetti.

- See Mathias, Gotthold: Einfluss der Flügelumrissform und der Querruderabmessungen auf die Quersteuerbarkeit beim Eindecker.

- See Perring, W. G. A., and C. Callen: The influence of a stopped airscrew

on the lift and drag of an aerofoil.

- See Pillard, M.: L'hélice "roue-libre" Paulhan-Pillard pour l'amélioration

du vol avec moteur arrête.

- See Pistolesi, E.: Considerazioni sul funzionamento dell'elica con tubo

addizonale.

- See Ralli, Panida Antonio: The equilibrium of loaded impeller blades with

special reference to the strength of thin metal airscrews.

- See Reissner, H., und Melitta Schiller: Auswertung experimentaller

Untersuchungen über Luftschrauben mit verdrehbaren Flügelblättern.

- See Seewald, Friedrich: Flutter in propeller blades.

- See Seewald, Friedrich: Über die Schwingungserscheinungen an Luftschrauben.

- See Seewald, Friedrich, und Walter Feucht: Versuchsfahrten mit einem

schnellfahrenden Schienenfahrzeug mit Luftschraubenantrieb.

- See Seguin, L. et A.: Étude des hélices, des injecteurs et des moteurs en

fonctionnement par le méthode stroboscopique et par le photographie au millionième de seconde.

- See Seiferth, R.: Berechnung von Luftschrauben und Vergleich mit Versuchsergebnissen.

- See Serragli, G.: Un singulare sistema di regolazione del passo delle eliche.

- See Stipa, Luigi: L'ala a turbina.

- See Stipa, Luigi: Esperienze con eliche intubate.

- See Stockholm: Der dritte internationale Kongress für technische Mechanik

Stockholm 1930.

- See Turnbull, W. R. : Controllable-pitch propeller.

- See Walsh, Raycroft: Dependability in propellers.

Propellers. See Webb, L. D.: Your propeller.

- See Weick, F. E.: Aircraft propeller design.

- See Williams, D. L. Hollis: The racing airscrews of 1931.

- See Wood, Donald H.: Full-scale tests of metal propellers at high tip

speeds. .

- See Wood, R. McKinnon, and W. G. A. Perring: Stresses and strains in

airscrews with particular reference to twist.

- See ZhukovskiT, Nikolai Egorovich: Theorie tourbillonnaire de l'hélice

propulsive, traduit du russe par A. Apostal . . . revu et annoté par W. Wettchinkine . . . Preface de W. Margoulis.

Propulsion. See Stipa, Luigi: Aerei per voli alle alte quote.

Prosciutto, A. Sulla determinazione degli angoli caratteristici dei palettamenti delle macchine a turbina.

L'Aerotecnica, Voi. 11, N. 5 (mag. 1931), Roma, pp. 571-588, daigrs. English abstract, p. 695.

Prudden-Whitehead. The Prudden-Whitehead monoplane. An American all-metal commercial machine.

Flight, No. 1149, Voi. 23, No. 1 (Jan. 2, 1931), London, pp. 10-11, ill.

Pryor, Edwin W. Wichita's municipal airport.

Aero Digest, Vol. 18, No. 4 (April 1931), New York, pp. 192-193, ill.

Pterodactyl. Pterodactyl.

Flight, No. 1199, Vol. 23, No. 51 (Dec. 18, 1931), London, pp. 1232-1233, ills.

- See Kjellson, Henry: Westland-Hill's "Pterodactyl" IB.

- See Westland Aircraft Company: The Pterodactyl aeroplane.

- See Westland-Hill: The Westland-Hill pterodactyl Mark IV, aeroplane.

Pumps. See L., P.: Nouvelles pompes à essence.

Putnam, George R. Radiobeacons and radiobeacon navigation. July 1, 1931. Washington, Government Printing Office, 1931, pp. 42, ills., diagrs., tabls. United States Bureau of Lighthouse Service.

Putnam, L. L. The aviation accounting system.

Chicago, Tallman, Robbins & Company, 1931.

- Too much money or too little—both bad.

Airway Age, Vol. 12, No. 5 (May 2, 1931), New York, pp. 481-484.

Pye, D. R. Compression-ignition engines. The history and development of heavy-oil engines with a section on future progress.

Aircraft Engineering, Vol. 3, No. 24, 25 (Feb., March, 1931), London, pp. 35-38, 70-72, ills., diagrs.

- The limits of compression ratio in Diesel engines.

Aer. Res. Comm., Rep. Mem., No. 1365 (E. 45-1. O. E. 787), November 1930, London, 1931, pp. 9, diagrs., tabi.

- The origin and development of heavy-oil aero engines.

Journ. Roy. Aer. Soc, Vol. 35, No. 244 (April 1931), London, pp. 266-298, ills., diagrs.

Pynches, T. le G. Aircraft armament.

Aeroplane, Vol. 40, No. 25 (June 24, 1931), London,.pp. 1210, 1214, 1216, 1218, 1220, ills.

Q

Quindry, Frank E. Aerial bombardment of civilian and military objectives. Journal of Air Law, Vol. 2, No. 4 (Oct. 1931), Chicago, pp. 474.

R

Rabbitt, P. J. The second year at the airport for the Nation's Capital. U.S. Air Services, Vol. 16, No. 4 (April 1931), Washington, p. 43.

Races. A month of races.

Western Flying, Vol. 10, No. 3 (Sept. 1931), Los Angeles, Calif., p. 27, ports.

- Speed and the races.

Western Flying, Vol. 10, No. 2 (Aug. 1931), Los Angeles, Calif., pp. 26-74, ports., ills.

- See King's Cup: The King's Cup race.

- See National Air Races: 236 M.P.H.

- See Wait, William, jr.: The value of air races.

Radcliffe, Frank. Technical features of the air mail.

Aircraft Engineer, Flight Engineering Section, Suppl. to No. 1157, 1161, Vol. 23, No. 9, 13 (Feb. 27, March 27, 1931), London, pp. 184d-184f (12-14), 272e-272g (21-23), maps.

Radiators. See Castagna, A.: Prove su radiatori per motori di aviazione.

- See Harris, R. G., L. E. Caygill, and R. A. Fairthorne: Wind tunnel

experiments on steam condensing radiators.

- See Harris, R. G., L. E. Caygill, and R. A. Fairthorne: Wind tunnel tests

on Gloster and Supermarine wing radiators.

- See Jones, E. T.: Drag and heat dissipation of three radiator systems.

- See Supermarine: Advance results of wind tunnel tests on supermarine

wing radiator.

Radio. Jämförelse mellan olika system for navigation av flygplan medelst radio.

Flygning, Arg. 9, N:R 11 (Nov. 1931), Stockholm, pp. 229-230, diagr.

- A new airplane radio device.

Science, Vol. 74, No. 1919 (Oct. 9,1931), New York, pp. 14.

- Radjostacja lotnicza typu A.D. 8.

Instytut Badan Technicznych Lotnictwa, Sprawozdania i Prace, Warszawa, 1926, pp. 35-38, ills., diagr.

- I servizi radiometeorici d'aeronautica. Indicazione abbreviata R.T.M.

Ore del tempo medio Europa centrale. Seconde edizione. Parte I. (Ministero dell' aeronautica. Direzione generale dei servizi del materiale e degli aeroporti).

Roma. Instit. poligraf. dello Stato edit, tip., 1931, pp. 34.

- See Bell Telephone Laboratories: Aircraft radio development.

- See Boone, Andrew R.: Recent developments in radio fog flying.

- See Bouman, L. F.: Een nieuwe koers in de ontwikeling der radio op

vliegtuigen.

- See Brown, Thad H.: State regulation of radio.

- See Bylewski, Jerzy: Badanie fai krótkich przeprowadzone przez Instytut

Badan Technicznych Lotnictwa wspóìnie z Instytutem Radjotechnicznym.

Radio. See Bylewski, Jarzy: Druga serja badan fai krótkich, przeprowadzona przez Instytut Badan Technicznych Lotnictwa wspólnie z Instytutem Radjotechnicznym.

- See Cassidy, Louis C: Does the Havana aerial convention fulfill a need?

- See Claxton, Brooke: Legislative control of radio in Canada.

- See Davies, Gomer Lewis: Theory of design and calibration of vibrating-

reed indicators for radio range beacons.

- See Denmark: Instruks for bevaegelige radiostationer om bord i skibe eller

luftfart0jer. April 1930.

- See Diamond, Harry, and Gomer Lewis Davies: Characteristics of airplane

antennas for radio range-beacon reception.

- See Donovan, William J.: Origin and development of radio law.

- See Dunmore, Francis Winkley: A course indicator of pointer type for the

visual radio range-beacon system.

- See Eddy, Myron Fish: Aircraft radio.

- See Eredia, Filippo: Sulla meteorologia radiotelegrafica.

- See Fog: Landning i dimma med radiotekniska hjälpmedel.

- See Germany: Verleihungsbedingungen und Verleihungsverfahren im Flugfunkdienst.

- See Gross, Gerald C: Aviation radio in Europe.

- See Hinman, W. S., Jr.: Automatic volume control for aircraft.

- See Hoover, Herbert Jr.: Radio on the world's airlines.

- See Kear, Frank Gregg., and Gerald Hiles Wintermute: A simultaneous

radio-telephone and visual range beacon for the airways.

- See Lansdowne, Beran: Radio—How to install it on aircraft.

- See Montagnes, James: Largest short-wave operator in Canada.

- See Musella, Francesco: Disciplina delle radiocommunicazioni nella navigazione aerea.

- See Musella, Francesco: La radiogoniometria nella navigazione aerea.

- See Musella, Francesco: Rete radiotelegrafica terrestre per la navigazione

aerea.

- See Sokolcow, Dymitry, i Jerzy Bylewski: Wyniki 2 serji badan nad roz-

chodzeniem si§ fai krótkich.

- See Strijkers, A.: Radioproeven op de Holland—Indie route.

- See United States Department of Commerce, Aeronautics Branch: Second

report of liaison committee on aeronautical radio research. October 15,1931.

- See Willets, H. N.: Radio for airports.

- See Wireless.

- See Young, H. E.: Radio for the private owner. .......

Radiobeacons. See Ide, John Jay: The Loth system of navigation by rotating radio beacons.

- See Putnam, George R.: Radiobeacons and radiobeacon navigation.

Raffaelli, Italo. Apparati motori a vapore per la navigazione stratosferica. Riv. Aer., Anno 7, N. 9 (sett. 1931), Roma, pp. 411-416, ill., diagrs.

- Apparecchio Ba/33 con [motore] Lynx suralimentato.

Riv. Aer., Anno 7, N. 11 (nov. 1931), Roma, pp. 319-321.

- L'autonomia del "Mystery S."

Riv. Aer., Anno 7, N. 7 (luglio 1931), Roma, pp. 1-4, ills.

- Profili alari seghettati.

Riv. Aer., Anno 7, N. 12 (die. 1931), Roma, pp. 452-455, diagrs.

Rahskopff, H. Luftsport-Verbände in der Tschechoslowakie. Luftschau, 4. Jahrg., Nr. 6 (24. März 1931), Berlin, p. 43.

Ralli, Pandia Antonio. The equilibrium of loaded impeller blades with special reference to the strength of thin metal airscrews.

Journ. Roy. Aer. Soc, Vol. 35. No. 242 (Feb. 1931), London, pp. 121-166, diagrs., tabls.

Ramsey, Logan C. Aircraft instruments as a safety factor.

Aero Digest, Vol. 18, No. 1 (Jan. 1931), New York, pp. 41,148, ill.

- The pilot and his air speed meter.

Aero Digest, Vol. 18, No. 2 (Feb. 1931), New York, pp. 48-49,146, ills., diagrs.

- The pilot and his aircraft compass.

Aero Digest, Vol. 18, No. 4 (April 1931), New York, pp. 54-55, 226, ills.

- The pilot and his altimeter.

Aero Digest, Vol. 18, No. 3 (March 1931), New York, pp. 47, 128-132, ill.

- The pilot and the compass error.

Aero Digest, Vol. 18, No. 5 (May 1931), New York, pp. 58-59.

Randall, C. E. The airplane aids the forester.

Nat. Aer. Mag., Vol. 9, No. 2 (Feb. 1931), Washington, pp. 29-35, ills.

Randolph, Ellen. "West Point of the air."

Western Flying, Vol. 10, No. 5 (Nov. 1931), Los Angeles, Cal., pp. 16-18, ills.

Randolph Field. See United States Congress. House. Committee on Military Affairs: Appropriation for construction at Randolph Field, San Antonio, Texas. Report to accompany H.R. 14912.

Rasmussen, Erik. See Vitt, Leonard: Flygarprofiler Erik Rasmussen.

Rathert, G. A. An efficiency formula for cargo airplanes.

Journ. Soc. Automotive Engineers, Vol. 29, No. 3 (Sept. 1931), New York, pp. 241-252.

Raven, E. Vom Freiballon, Fortschritt, Handikap und dem fehlenden Gordon-Bennett-Ballon.

Luftschau, 4. Jahrg., Nr. 7 (10. April 1931), Berlin, p. 52.

Ravens. See Täning, A. Vedel: Ravens flying upside-down.

Rawson, A. H. See Sanders, C. J., and A. H. Rawson: The book of the C. 19 autogiro; the principle of operation described together with notes on running and maintenance.

Rea, Courts D. 10 months' aircraft exports, 1930.

Aero Digest, Vol. 18, No. 2 (Feb. 1931), New York, pp. 52,122.

Rechtlich, Arved. Grundlagen für die Konstruktive Anwendung und Ausführung von Stahlrohrschweissungen im Flugzeugbau.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V. München und Berlin, 1931, pp. 379-433, ills., diagrs., tabls.

Records. Four hundred miles an hour.

Aeroplane, Vol. 41, No. 15 (Oct. 7, 1931), London, pp. 860-862. G". H. Stainforth raised his own speed record.

- Nouveaux records d'aviation légère.

L'Aéronautique, 13me année, No. 143 (avril 1931), Paris, p. 116, ill.

- Nouveaux records homologués par la F. A. I.

Bull. Féd. Aér. Int., 12e année, No. 44, 45, 46-47 (Jan., avril, juil.-oct. 1931), Paris, pp. 21-23, 41-42, 114-116, ills. Bossoutrot et Ross.

Auguste Piccard, Paul Kipfer, W. E. Less et J. A. Bossy, Lebrix et Doret.

- Les nouveaux records de durée et de distance en circuit.

L'Aéronautique, 13me année, No. 143 (avril. 1931), Paris, pp. 115-116, ill.

- Records officiels au 31 décembre 1930. Records du monde. Records du

monde avec ravitaillement en vol. Records internationaux par classe.

Bull. Féd. Aér. Int., 12e année, No. 44, 45 (Jan., avril 1931), Paris, pp. 26-32, 45-51.

- Records officiels au 1er octobre 1931. Records du monde. Records du

monde avec ravitaillement en vol. Records internationaux par classe.

Bull. Féd. Aér. Int., 12e année, No. 46-47 (juil.-oct. 1931), Paris, pp. 117-124.

- Rekorde. Stand der von der F A. I. anerkannten internationalen

Flugzeug-Rekorde am 1. Januar 1931.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 1. Heft (14. Jan. 1931), München und Berlin, pp. 32-34, tabl.

- Some more new records.

Flight, No. 1163, Vol. 23, No. 15 (April 10,1931), London, p. 314, ills.

- Tableaux des records d'aviation homologués par la F. A. I. au 1er janvier

1931.

L'Aéronautique, 13me année, No. 140 (jan. 1931), Paris, supplément I. Classe C—Avions. II. Classe Cbis.—Hydravions.

- Two new records. Duration and distance (closed circuit) by Lalouette

and Reginensi.

Flight, No. 1161, Vol. 23, No. 13 (March 27, 1931), London, p. 265, ills.

- World's records in aviation.

Flight, No. 1160, Vol. 23, No. 12 (March 20, 1931), London, p. 247.

—— See Fairey, M. C. R.: Considérations sur avions de records et avions militaires.

- See Hirschauer, Louis: N'y a-t-il pas trop de records du monde?

- See Jaffeux-Tissot, M.: Après les records de durée et de distance.

Refuelling. See Larrard, J. H. B.: The refuelling of aircraft in flight.

Regia Aeronautica. The triumph of the Regia Aeronautica. Aeroplane, Vol. 40, No. 2 (Jan. 14, 1931), London, pp. 58, 60.

- See Brazil: The Regia Aeronautica in Brazil.

Regulations. See Laws and regulations.

Reid, Andrew. Merchandising needs.

Airway Age, Vol. 12, No. 3 (Mar. 1931), New York, pp. 265-268, ills.

Reid, T. M. Winter flying in northern Canada.

Aviation, Vol. 30, No. 6 (June 1931), New York, p. 364, ill.

Reid-Sigrist. The Reid-Sigrist turn indicator.

Flight, No. 1186, Vol. 23, No. 38 (Sept. 18, 1931), London, pp. 953-9:.4, ills.

- See Blind flying: A new instrument for blind flying. The Reid-Sigrist

Turn Indicator.

Reissner, H., und Melitta Schiller. Auswertung experimenteller Untersuchungen über Luftschrauben mit verdrehbaren Flügelblättern.

Zeitschr., Flugt. Motorluftsch., 22. Jahrg., 18. Heft (28. Sept. 1931), München und Berlin, pp. 551-557, diagrs., tabls.

Relf, E. F. Aerodynamic research in 1930. The progress made during the year with special reference to wind tunnel design and fluid flow. Aircraft Engineering, Vol. 3, No. 23 (Jan. 1931), London, pp. 13-14, ill.

- Design of wind tunnels.

Aircraft Engineering, Vol. 3, No. 24 (Feb. 1931), London, pp. 27-28.

Rennie, J. D. The development of the long-range flying boat.

Flight, No. 1167, 1168, Vol. 23, No. 19, 20 (May 8, 15,1931), London, pp. 413-416, 434-437, ills., diagrs.

Rentschler, Frederick B. Glancing back at 1930. The aircraft industry. Western Flying, Vol. 9, No. 1 (Jan. 1931), Los Angeles, Cal., p. 38.

- Importance of uniform aeronautic regulatory laws to the aircraft industry.

U.S. Air Services, Vol. 16, No. 1 (Jan. 1931), Washington, pp. 32-34.

- National conference on uniform aeronautic regulatory laws. Importance

of uniform aeronautic regulatory laws of the aircraft industry.

Air Law Review, Vol. 2, No. 2 (April 1931), New York, pp. 222-228.

Res ipsa loquitur. See Osterhout, Howard: The doctrine of res ipsa loquitur as applied to aviation.

Research. See Klemin, Alexander: Recent aircraft engineering research.

- See Larner, L., and J. Ackeret: Aeronautical education and research at

the Swiss Institute of Technology in Zurich.

Resistance. See Epstein, Paul S.: On the air resistance of projectiles.

- See Huber, Maksymiljan T.: Nowoczesne wzory wytrzymaloäci zlozonej.

- See Muttray, H.: Widerstand und Kühlwirkung eines Flugzeugrumpfes

mit verschieden angeordnetem Kühler.

- See Pasqualini, Clodoveo: La resistenza dell'aria per corpi sferici rotanti

a velocitä prossima a quella del suono.

- See Schiller, L., and R. Herman: Resistance of plates and pipes at high

Reynolds numbers.

Resnier, Andre Guillaume. See Lemoing, C: Le premier vol sans moteur vers 1806 ä Angoulöme.

Reynolds. See Dupin, P., et Trisse-Solier: Hydrodynamique.—Sur les tour-billons alternes de Benard-Karman et la loi de similitude dynamique de Reynolds.

Reynolds, Austyn. Seamless steel tubes for aircraft. A description of the manufacturing processes employed with a discussion on materials and their qualities.

Aircraft Engineering, Vol. 3, No. 28 (June 1931), London, pp. 141-143, Ills.

Rhode, Richard V., and Eugene E. Lundquist. Applied load factors in bumpy air. A preliminary study in the light of the meteorological data at present available.

Aircraft Engineering, Vol. 3, No. 30 (Aug. 1931), London, pp. 197-200, diagrs.

Rhode, Richard V. The place of pressure distribution tests in structural design. .

Aviation, Vol. 30, No. 2 (Feb. 1931), New York, pp. 98-101, ills.

Rhode, Richard V., and Eugene E. Lundquist. Preliminary study of applied load factors in bumpy air.

National Advisory Committee for Aeronautics, Technical Notes No. 374, April 30, 1931, Washington, April 1931, pp. 30, diagrs, ,tabls.

—— The pressure distribution over a modified elliptical wing tip on a biplane in flight.

National Advisory Committee for Aeronautics, Technical Notes No. 387, Aug. 28, 1931, Washington, August 1931, pp. 14, diagrs., tabls.

-■ The pressure distribution over a semicircular wing tip on a biplane in

flight.

National Advisory Committee for Aeronautics, Technical Notes No. 379, May 26, 1931, Washington, May 1931, pp. 14, diagrs., tabls.

- The pressure distribution over a square wing tip on a biplane in flight.

National Advisory Committee for Aeronautics, Technical Notes No. 360, Jan. 13, 1931, Washington, January 1931, pp. 22, diagrs., tabls.

- Pressure distribution over the fuselage of a PW-9 pursuit airplane in

flight.

National Advisory Committee for Aeronautics, Report No. 380, May 16, 1931, Washington, U.S. Government Printing Office, 1931, pp. 29, ills., diagrs., tabls.

Rhode, Richard V. The pressure distribution over the wings and tail surfaces of a PW-9 pursuit airplane in flight.

National Advisory Committee for Aeronautics, Report No. 364, Jan. 26, 1931, Washington, U.S. Government Printing Office, 1930, [1931], pp. 103, ills., diagrs., tabls.

Rhode, Richard V., and Eugene E. Lundquist. Strength tests on paper cylinders in compression, bending, and shear.

National Advisory Committee for Aeronautics, Technical Notes No. 370, April 7, 1931, Washington, April 1931, pp. 14, ills., diagrs., tabls.

Rhodesia. Nord-Rhodesian, Sperrgebiete.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 13-14 (4. April 1931), Berlin, p. 91.

- Süd-Rhodesien. Gesetz.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 13-14 (4. April 1931), Berlin, pp. 91-92.

-- See Cochran-Patrick, C. K.: Aerial reconnaissance mapping in northern

Rhodesia.

Rhön. Auch die "12. Rhön 1931" überaus erfolgreich! Von Segelflugzeugen, Führern und Oberleitung.

Luftschau, 4. Jahrg., Nr. 15 (10. Aug. 1931), Berlin, pp. 30-32.

- Rhön-zauber; segelflieger-erinnerungen; unter mit Wirkung bedeutender

und unbedeutender Rhön- und Rossitten-Indianer und sonstigen segelfliegerGermanen.

Frankfurt a. M., Verlag "Flugsport", 1931, PP- 43> üls-

- Le vol à voile à la Rhön et en France.

L'Aéronautique, 13me année, No. 149 (oct. 1931), Paris, pp. 344-346, fils.

- See Georgii, Walter: Bericht über den 11. Rhön-Segelflug-Wettbewerb.

Rhön See Georgii, Walter: Eleventh Rhön soaring-flight contest.

- See Maas, H. J. van der: Bezoek aan Rossitten en wasserkuppe.

- See O'Meara, J. K. (Jack): The 1931 Rhoen soaring contest at the Wasserkuppe.

- See Plath, Erich: Eindrücke vom 12. segelflugwettbewerb auf der Rhön.

Rhön-Rossitten-Gesellschaft. Richtlinien für den bau von gleit- und Segelflugzeugen, bearbeitet von der Technischen Kommission der Rhönsegelflugwettbewerbe unter mitwirkung von W. Coulmann, Karl Haarmann, Anton Holtmann, Alexander Lippisch, Edmund Pfister, Max v. Pilgrim.

Frankfurt am Main, Selbstverlag der R. R. G., 1931, pp. 27 ills., tabls.

- See Georgii, Walter: Veröffentlichungen des Forschungs-Instituts der

Rhön-Rossitten-Gesellschaft e. V. Nr. 4: Jahrbuch 1929 und Abhandlugen der I. Wissenschaftlichen Segelflugtagung.

Ribs. See Haley, R.: Setting out taper ribs.

Ricardo, Harry R. The high-speed internal-combustion engine.

London, Glasgow and Bombay, Blackie and Son., Ltd., 1931, pp. vi, 435.

Ricci, Adelina. La crociera atlantica delle ali italiane 1930-1931. Casale Montferrato, Tipografia cav. G. G. Lavagno, 1931, pp. 8.

Richardson, Edward Gick. Circulation round a rotating cylinder in a viscous fluid.

Philosophical Magazine, Vol. 11, No. 74 (June 1931), London, pp. 1215-1220.

- Flow of air adjacent to the surface of a rotating cylinder in a stream.

Aer. Res. Comm., Rep. Mem., No. 1368 (Ae. 495-T. 3049), December 1930, London, 1931, pp. 12, ills., diagrs., tabls.

- Jet propulsion for aircraft.

Journ. Roy. Aero. Soc, Vol. 35, No. 241 (Jan. 1931), London, pp. 29-36, ills., diagrs.

- Re jet propulsion.

Journ. Roy. Aer. Soc, Vol. 35, No. 244 (April 1931), London, pp. 338-339.

Richardson, James Monroe. Man's wings—how to fly in word and picture. Chicago, The Reilly & Lee Co., 1931, pp. 107, ills. Drawings by John McCormick.

Richardson, Phil. Lieut. Westley wins Patrick trophy race. Aero Digest, Vol. 18, No. 1 (Jan. 1931), New York, p. 101.

Richthofen, BaRone von. See Scaroni, Silvio: Commento alle "Memorie" del Barone von Richthofen.

Rickenbacker, Edward V. The spirit of armistice.

U.S. Air Services, Vol. 16, No. 12 (Dec. 1931), Washington, D.C., pp. 28-29.

Ridder, E. I. de. The use of elektron metal in airplane construction.

National Advisory Committee for Aeronautics, Technical Memorandums No. 608, Feb. 28, 1931, Washington, February 1931, pp. 22, ills., tabls.

Rigging. See Great Britain. Air Ministry: A manual of rigging for aircraft.

Rijks-Sttjdiedienst voor de Luchtvaart. See Amsterdam: De Rijks-Studiedienst voor de Luchtvaart, Amsterdam. Verlag over het jaar 1930.

Rings. See Cowling.

69261—34-16

Rings. See Engel, John H.: Rings—How to install them.

- See Townend, H. C. H.: A study of slots, rings & boundary layer control

by blowing.

- See Townend, H. C. H.: A study of slots, rings and jet control of the

boundary layer.

Ritchie, H. C. New airport lighting development.

Airway Age, Vol. 12, No. 3 (Mar. 1931), New York, pp. 255-253, ills.

Ritter, Hans. Post-war fighter progress.

Aviation, Vol. 30, No. 12 (Dec. 1931), New York, pp. 692-694, diagrs.

Riveted joints. See Weiss, Stanislaw: Pol^czenia nitowe duraluminjowe.

Rivets. See Bradfield, F. B., and F. W. G. Greener: Wind tunnel test of the increased drag of a quarter scale float on adding rivets.

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- A brief outline of the growth of British air power from the balloon company

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Flight, No. 1174, Vol. 23, No. 26 (June 26, 1931), London, pp. 581-606, ills.

- The Central Flying School.

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- The end of the historic contest. Schneider trophy won by Great Britain.

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- Mount Batten Nos. 204 and 209 (flying boat) squadrons.

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- No. 600 (City of London) (Bomber) squadron.

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Rocket power. Espenlaub Rak. I. Schwanzloses Versuchsflugzeug mit Raketenantrieb.

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- See Baumgarten-Crusius, Artur: Die rakete als weltfriedenstaube.

- See Biermann, Gerd: Weltraumschiffahrt? Eine kurze studie des problems.

—- See Heinze, Edwin P. A.: Experiments with rockets.

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Rogers, Leighton W. American aeronautics abroad.

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Rohlfing, Charles Carroll. National regulation of aeronautics.

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Flight, No. 1198, Vol. 23, No. 50 (Dec. 11,1931), London, pp. 1210-1212, ills.

- See Airships: Our last airship. R. 100.

- See Norway, N. S.:' R. 100 Canadian flight 1930. Journal written on

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Nature, Vol. 127, No. 3208 (April 25, 1931), London, pp. 617-619.

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Engineering, Vol. 131, No. 3404 (April 10, 1931), London, pp. 487-488.

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- Report of the R. 101. Presented to the Secretary of State for Air to

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Flight, No. 1162, Vol. 23, No. 14 (April 3,1931), London, pp. 290-291.

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Roosevelt Field. Roosevelt field.

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Roper, Albert. La Convention internationale du 13 octobre 1919 portant réglementation de la navigation aérienne. Son origine. Son application. Son avenir.

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Rose, Don. The blind spot.

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- The traffic of tomorrow.

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—— See Cierva, Juan de la, and Don Rose: Wings of tomorrow; the story of the autogiro.

Roseck, Erich. Segelflygning—Tysklands nyaste sport.

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Rosenblatt, Alfred. Hydrodynamique.—Sur la stabilité des mouvements laminaires des liquide visqueux incompressibles.

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Rosendahl, Charles Emery. Up ship!

New York, Dodd, Mead and Company, 1931, pp. xiv, 311, üls.

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Rosenkranz, Hans. Ferdinand graf von Zeppelin; die geschiente eines abenteuerlichen lebens.

Berlin, Ullstein, 1931, pp. 205, ills.

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Ross, E. W. Itinerant flying schools.

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Ross, Louis F. Servicing shock absorber struts.

Aviation, Vol. 30, No. 8 (Aug. 1931), New York, pp. 477-478, ills.

Ross, Malcolm Harrison. Sailing the skies; gliding and soaring. New York, The Macmillan Company, 1931, pp. xiv, 276, ills.

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Rothrock, Addison M. Combustion in a high-speed compression-ignition engine.

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Rothrock, Addison M. Hydraulics of fuel injection pumps for compression-ignition engines.

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Berlin, Reichsverband der deutschen industrie, 1931.' • ■'• -

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- The twelfth Royal Air Force display.

Flight, No. 1175, Vol. 23, No. 27 (July 3, 1931), London, pp. 619-634, ills.

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--- See Military aeronautics: On the Army and the Air Force.

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Russell, H. W., and W. A. Welcker, Jr. Endurance and other properties at low temperatures of some alloys for aircraft use.

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Safety. The Chamber's safety conference project.

Aviation, Vol. 30, No. 7 (July 1931), New York, p. 416, ill.

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- Premier Congrès Internationale de la sécurité aérienne organisé par le

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Safety. Safety in flight.

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Aeronautical Engineering, suppl., to the Aeroplane, Vol. 40, No. 21 (May 27,1931), London, pp. 979-980.

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- The 50 h.p. British Salmson aero engine.

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Samoilowitsch, R. "S O S in der Arktis."

Berlin, Union Deutsche Verlags-Ges., 1929, pp. 410, ills.

Samson, Charles Rumney. Charles Rumney Samson.

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London, E. Benn, ltd., 1931, pp. x, 196, ills., map.

Samuels, L. T. Airplanes for regular daily upper-air observations.

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Nat. Aer. Mag., Vol. 9, No. 2 (Feb. 1931), Washington, pp. 21, 23-24, 26-27, ills.

- Commercial aviation in Italy.

Nat. Aer. Mag., Vol. 9, No. 12 (Dec. 1931), Washington, pp. 11-12.

Scaroni, Silvio. Commento alle "Memorie" del Boarne von Richthofen. Riv. Aer., Anno 7, N. 9 (sett. 1931), Roma, pp. 417-446.

Schaefer, O. W. Is bildning pâ flygplan.

Flygning, Ârg. 9, N: R 1 (Febr. 1931), Stockholm, pp. 33, 36, ills.

Schäffer, Ernst. Pour le Mérite. Flieger im Feuer.

Berlin, Union Deutsche Verlagsgesellschaft, 1931, pp. 178, ills.

--Glück ab; bahnbrecher der lüfte.

Berlin, Union Deutsche Verlagsgesellschaft, 1931, pp. 217, ports. Contents: Otto Lilienthal, S. A. Andrée, David Schwarz, Ferdinand Graf Zeppelin, Hugo Eckener, Hugo Junkers, Charles A. Lindbergh, E. G. freiherr v. Hünefeld, Umberto Nobile, R. E. Byrd.

Schalckens, Léo. Per vliegtuig naar Skandinavië. Brüssel, A. Wouters, 1931.

Scharnow, C. Luftschiffhalle Löwental.

Zeitschr. Ver. deutscher Ing., Bd. 75, Nr. 21 (23. Mai 1931), Berlin, p. 670, ill.

Scheibe, R. Die Verkehrsluftfahrt geographisch betrachtet. Dresden, Zhan und Iaensch, 1931, pp. 125, ill.

ScHEiNERT, Carleton A. Private flying in the Rockies.

Western Flying, Vol. 9, No. 5 (May 1931), Los Angeles, Calif., pp. 39-41, ills.

Schempp, Martin. Cloud hopping in soaring flight.

Nat. Aer. Mag., Vol. 9, No. 12 (Dec. 1931), Washington, pp. 21-22, ills.

Schempp, Martin H. See Hirth, Wolfram K. E., Martin H. Schempp, and . Jack Herrick: Elmira soaring contest, 1930.

Schenck. See Wolski, Kazimierz: Nowoczesne pröby nazmçczeniei opismaszyny Schenck'a zainstalowanej w IBTL.

Schenk, Ewalt. Der Flughafen.

Leipzig 1931, pp. 75.

Schenk, Heinz. Finanzierung und Organisation des Luftverkehrs, unter besonderer Berücksichtigung der deutschen Verhältnisse. Frankfort a. M., Diplom-Volkswirt, 1930, pp. 165, ill.

Scheubel, F. N. On atomization in carburetors.

National Advisory Committee for Aeronautics, Technical Memorandums No. 644, Nov. 29, 1931, Washington, October 1931, pp. 10, ills., diagrs.

- Über den Luftwiderstand luftgekühlter Sternmotoren.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 3. Heft (14. Feb. 1931), München und Berlin, pp. 72-73, ills.

Schey, Oscar .William. The comparative performance of superchargers.

.....- -. . .. National Advisory Committee for Aeronautics, Beport No. 384,. April 15,.1931, Washington,

u.S. Government Printing Office, 1931, pp. 15, ills., diagrs., tabls. . •

Schey, Oscar William, and Vern G. Rollin. The effect of increased carburetor pressure on engine performance at several compression ratios.

National Advisory Committee for Aeronautics, Report No. 404, Jan. 25, 1932, Washington, U.S. Government Printing Office, 1931, pp. 12, ills., diagrs., tabl.

Schey, Oscar William, and Arnold E. Biermann. The effect of valve timing upon the performance of a supercharged engine at altitude and an unsuper-charged engine at sea level.

National Advisory Committee for Aeronautics, Report No. 390, Aug. 14, 1931, Washington, U.S. Government Printing Office, 1931, pp. 13, ills., diagrs.

Schey, Oscar William, and Alfred W. Young. A method for reducing the temperature of exhaust manifolds.

National Advisory Committee for Aeronautics, Technical Notes No. 390, Sept. 8, 1931, Washington, September 1931, pp. 9, ills., diagr., tabl.

Schey, Oscar William. Superchargers and supercharging. A summary of the data obtained during an important series of experiments carried out by the N.A.C.A.

Aircraft Engineering, Vol. 3, No. 28 (June 1931), London, pp. 134-138.

Schiavone, Michele. I servizi aerei civili. Studio statistico-economico-giuridico.

Genova, tip. Bozzo e Coccarello, 1930, pp. viii, 168, ills.

Schildhauer, C. H. The DOX—Profitable transportation.

U.S. Air Services, Vol. 16, No. 10 (Oct. 1931), Washington, pp. 18-19, ills.

Schilhansl, Max. Modellversuche zur Ermittlung des Leistungsbedarfs für die Künstliche Belüftung von Motorenprüfständen.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 36-42, ills., diagrs.

- Versuche an einem Windkanalmodell.

Jahrbuch 1931 der Deutschen Versuchsaustalt für Luftfart, E. V., München und Berlin, 1931, pp. 23-35, ills., diagrs.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 4., 5. Heft (28. Feb., 14. März 1931), München und Berlin, pp. 107-117, 147-149, ills., diagrs.

Schiller, Ludwig und R. Herman. Resistance of plates and pipes at high Reynolds numbers.

National Advisory Committee for Aeronautics, Technical Memorandums No. 600, Jan. 8, 1931, Washington, January 1931, pp. 13, diagrs.

Schiller, Ludwig. See Wien, Wilhelm Carl Werner Otto Fritz Franz, und F. Harms, unter mitarbeit von H. Lenz: Handbuch der Experimentalphysik, Band 4, 3. Teil. Hydro- und Aerodynamik, 3. Teil, Technische an Wendungen.

Schirmer, M. See Sturm, Fritz, und M. Schirmer: Triebwerkanlage mit Vorgelege im Luftschiff " Graff Zeppelin."

Schlegel, John. Aircraft export salesmanship below the Rio Grande. Aero Digest, Vol. 18, No. 4 (April 1931), New York, pp. 35, 47.

Schlerf. See Beinhorn, Elli Beinhorn, Schlerf und Udet erzählen.

Schmeidler, Werner. Eine Formel für das Rollmoment bei Tragflügeln.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 22. Heft (28. Nov. 1931), München und Berlin, pp. 658-659, tabl.

—~~ Untersuchungen über Flugzeuge mit veränderlichen Flächen...

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 11. Heft (15. Juni 1931), München und Berlin, pp. 325-329, ills., diagrs.

Schmidt, Erich K. O. Einfluss von Kochsalzlösungen verschiedener Konzentration auf den Verlauf des Korrosionsangriffs im Wechseltauchversuch.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt,E. V., München und Berlin, 1931, pp. 521-524, ills., diagr., tabls.

- Korrosion durch Potentialunterschiede und ihre Verhütung.

Zietschr. Flug. Motorluftsch., 22. Jahrg., 6. Heft (28. März 1931), München und Berlin, pp. 177-178 ills.

- Quantitative Ermittelung der Schutz Wirkung von Anstrichen auf Holz.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 537-541, ills., diagrs., tabls.

- Seewasserbeständigkeit galvanischer Überzüge auf Eisen und Leichtmetallen.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 5. Heft (14. März 1931), München und Berlin, pp. 141-147, ills., tabls.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 525-531, ills., tabls.

- Verfahren der Korrosionsprüfung.

Jahrbuch 1931 der Deutschen Versuchs-Anstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 495-504, ills., diagrs.

Schmidt, Friedrich. Modell flugzeuge mit presshuft-motor. Wie bane ich

mire selbst. Bd. 86.

Leipzig, H. Beyer, 1931.

Schmidt, Wilhelm. Beitrag zur Entwicklung eines autorotationsfreien steil landbaren Flugzeuges.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 18,19. Heft (28. Sept., 14. Okt. 1931), München und Berlin, pp. 546-549, 569-578, ills., diagrs.

- Development of a non-autorotative airplane capable of steep landing.

National Advisory Committee for Aeronautics, Technical Memorandums No. 650, Dec. 10, 1931, Washington, December 1931, pp. 26, ills., diagrs.

- See Fuchs, Richard, and Wilhelm Schmidt: The dangerous flat spin and

the factors affecting it.

- See Fuchs, Richard, and Wilhelm Schmidt: The dangerous sideslip of a

stalled airplane and its prevention.

- See Fuchs, Richard, und Wilhelm Schmidt: Das gefährliche seitliche

Kippen eines Flugzeuges über den Flügel und seine Beeinflussung.

- See Fuchs, Richard, and Wilhelm Schmidt: The steady spin.

Schmieschek, Ulrich. HyperSensibilisierung optisch sensibilisierter Emulsionen und optishce Sensibilisierung hypersensibilisierter Emulsionen.

Jahrbuch 1931 der Deutschen Versuchsanstalt für luftfahrt, E. V., München und Berlin, 1931, pp. 594-599, diagrs.

- Versuche zur Steigerung der Haltbarkeit hypersensibilisierter Emulsionen.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 600-604, diagrs., tabls.

Schmuttermayer, G. Flieger-Erinnerungen.

Dachan, Druckerei und Verlagsanstalt Bayerland a.g., 1931, pp. 53.

Schnadel, Georg. Relations between ship design and seaplane design.

National Advisory Committee for Aeronatucs, Technical Memorandums No. 645, Nov. 5, 3931, Washington, November 1931, pp. 10, diagrs.

---Zusammenhänge zwischen Schiffbau und Seeflugzeugbau.

Zeitschr. Ver. deutscher Ing., Bd. 75, Nr. 27 (4. Juli 1931), Berlin, pp. 870-872, ills., diagrs. Zeitschr. Flugt. Motorluftsch., 22. Jahrg, 15. Heft (14. Aug. 1931), München und Berlin, pp. 453-456, ills., diagrs.

Schnauffer, Kurt. Das Klopfen von Zündermotoren.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 375-378, ill., diagrs.

- Untersuchung von Verbrennugsvorgängen in Zündmotoren mittels elektrischer Messverfahren.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 17. Heft (14. Sept. 1931), München und Berlin, pp. 526-530, ills., diagrs.

Schneider Trophy. Arets Schneidercupvinnare.

Flygning Arg. 9, N:R. 11 (Nov. 1931), Stockholm, pp. 213-215, ill.

- La Coupe Schneider et le record de vitesse.

L'Aéronautque, 13me année, No. 149 (oct. 1931), Paris, p. 343, ill.

- La Coupe Schneider 1931.

L'Aérophile, 39e année, No. 9 (15 sept. 1931), Paris, pp. 258-259, ills.

- Finale to the Schneider trophy contest.

Flight, No. 1199, Vol. 23, No. 51 (Dec. 18, 1931), London, pp. 1240-1241.

- History of the Schneider trophy contests.

Flight, No. 1185, Vol. 23, No. 37 (Sept. 11, 1931), London, pp. 895-908, ills.

- Notes techniques et critiques sur les supermarine de la Coupe Schneider.

L'Aéronautique, 13me année, No. 150 (nov. 1931), Paris, pp. 375-3S0, ills., diagrs.

- On the course for the Schneider contest.

Aeroplane, Vol. 40, No. 6 (Feb. 11,1931), London, pp. 225-226, 228.

- On the Schneider affair.

Aeroplane, Vol. 40, No. 4 (Jan. 28, 1931), London, pp. 133-134,136.

- On the Schneider contest day-by-day.

Aeroplane, Vol. 40, No. 5 (Feb. 4, 1931), London, pp. 181-182, 184, 186.

- On the Schneider trophy contest.

Aeroplane, Vol. 41, No. 11, 12 (Sept. 9,16,1931), London, pp. 609-620, 685-700, ills.

- Our Schneider preparations.

Aeroplane, Vol. 41, No. 7 (Aug. 12, 1931), London, pp. 413-424, ills.

- The passing of an era. The gains and losses of the Schneider Trophy

contests.

Aircraft Engineering, Vol. 3, No. 32 (Oct. 1931), London, pp. 239-240.

- Power and speed. The influence of the Schneider contests.

U.S. Air Services, Vol. 16, No. 11 (Nov. 1931), Washington, D.C., pp. 11-15, ills.

- The Schneider contest.

Flight, No. 1167, 1180,1182, 1183, Vol. 23, No. 19, 32, 34, 35 (May 8, Aug. 7, 21, 28, 1931), Lon don, pp. 399, 782, 827-829, 857-858, ills.

- Schneider contest, 1931.

Flight, No. 1181, Vol. 23, No. 33 (Aug. 14, 1931), London, pp. 809-810, map.

- The Schneider decision.

Flight, No. 1154, Vol. 23, No. 6 (Feb. 6, 1931), London, pp. 107-108.

- Schneider notes.

Aeroplane, Vol. 40, No. 12 (March 25, 1931) London, pp. 511.

- The Schneider trophy.

Flight, No. 1153, Vol. 23, No. 5 (Jan. 30, 1931), London, pp. 97-98.

- The Schneider trophy contest.

Aeroplane, Vol. 40, 41, No. 3, 6 (Jan. 21, Aug. 5, 1931), London, pp. 94, 96, 342, map.

Schneider Trophy. The Schneider trophy contest.

Engineering, Vol. 132, No. 3427 (Sept. 18, 1931), London, p. 385, ill.

Vickers supermarine Rolls-Royce racing seaplane.

Nature, Vol. 128, No. 3229 (Sept. 19, 1931), London, pp. 471-473.

11th contest. Great Britain has won It for three times. Final award.

- Schneider trophy details.

Aircraft Engineering, Vol. 3, No. 32 (Oct. 1931), London, p. 246.

- The Schneider trophy. High speed flight selected.

Flight, No. 1161, Vol. 23, No. 13 (March 27, 1931), London, pp. 266-267.

- Schneider trophy preparations.

Aeroplane, Vol. 41, No. 9, 10, 11 (Aug. 26, Sept. 2, 9, 1931), London, pp. 528-530, 580-584, 646a-646b, ills.

- The Schneider trophy seaplane. Some notes on the special features of the

S. 6. B. with reasons for their incorporation.

Aircraft Engineering, Vol. 3, No. 32 (Oct. 1931), London, pp. 247-248, ills.

- The Schneider swan song.

Aeroplane, Vol. 41, No. 25 (Dec. 16, 1931), London, pp. 1367-1370, ills.

- Something more about the machines and engines that won the Schneider

trophy.

Aeroplane, Vol. 41, No. 14 (Sept. 30, 1931), London, pp. 816-820, ills.

- 379 miles per hour.

Western Flying, Vol. 10, No. 4 (Oct. 1931), Los Angeles, Cal., p. 27, ill., tabl.

- 12. internationaler Wettflug für Seeflugzeuge um die Schneider-Trophäe

in England.

Zeitschr. Ver. deutscher Ing., Bd. 75, Nr. 40 (3. Okt. 1931), Berlin, p. 1263.

- See Aeronautical Research Committee: Collected reports on British high

speed aircraft for the 1927 Schneider Trophy contest.

- See Banks, F. Rodwell: The evolution of a Schneider engine.

- See Blanchet, Georges: La Coupe.

- See Bradbrooke, F. D.: The why and wherefore of the contest.

- See Bridgman, Leonard: Britain's representatives.

- See Coombes, L. P.: Notes on the Schneider Cup race of 1927.

- See James, Thurston: How to see the contest.

- See Kleffel, Walther: Abschied vom Schneider-Pokal.

- See L., P.: Un moteur de Coupe Schneider 1929; le 1600 HP Hispano-

Suiza.

- See Lallier, Roger: La Coupe Schneider est définitivement gagnée par

l'Angleterre.

- See McAlery, C. M.: At Calshot.

- Se". McLean, Sir Robert: Has Schneider racing been worth while.

- See Moffett, William A.: The Schneider Seaplane Trophy—symbol of

speed supremacy in the air.

- See Robertson, F. A. de V.: The end of the historic contest. Schneider

trophy won by Great Britain.

Schneider Trophy. See Robertson, F. A. de V.: Schneider teams at Calshot.

- See Sinbad the Sailor: The contest from afloat.

Schnurmacher, E. C. Without leaving the ground.

Western Flying, Vol. 10, No. 1 (July 1931), Los Angeles, Calif., pp. 32-33, ills.

Schofield, T. H. See Grogac, J. D., and T. H. Schofield: Report on some properties of alloys of aluminium with thorium and silicon.

- See Rosenhain, W., J. D. Grogan, and T. H. Schofield: Gas removal and

grain refinement in aluminium alloys.

- See Rosenhain, W., J. D. Grogan and T. H. Schofield: The influence of

Titanium Tetrachloride on cast aluminium alloys.

Schools. See Lawson, I. N., Jr.: The business of running a flying school.

- See Ross, E. W.: Itinerant flying schools.

- See Stimson, Thomas E., Jr.: Aviation in the high schools.

Schraivogel, K. Einfluss der Probestabform auf Zugfestigkeit und Bruchdehnung von dünnen Leichtmetallblechen.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 485-494, ills., diagrs., tabls.

Schreiber, D. Dem Gedächtnis eines deutschen Helden. Zu Boelckes 40. Geburtstag.

Luftschau, 4. Jahrg., Nr. 9 (10 Mai 1931), Berlin, p. 68.

- Idealismus deutscher Flieger.

Luftschau, 4. Jahrg., Nr. 2 (24. Jan. 1931), Berlin, pp. 9-10.

Schreiber, Ernst. Messgenauigkeit des Behmlotes für Flugzeuge in geringen Flughöhen.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 3. Heft (14. Feb. 1931), München und Berlin, pp. 77-79, ills., tabl.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahahrt, E. V., München und Berlin 1931, pp. 591-593, ills., tabl.

Schrenk, Martin Jahresschau der Luftfahrtwissenschaft.

Zeitschr. Ver. deutscher Ing., Bd. 75, Nr. 32 (8, Aug. 1931), Berlin, pp. 1026-1028.

- Über das Zusammenwirken von Flug werk und Triebwerk.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 23, 24. Heft (14. 28. Dez. 1931), München und Berlin, pp. 695-702, 721-727, ills., diagrs.

Schrenk, Oskar. Experiments with a wing from which the boundary layer is removed by suctior.

National Advisory Committee for Aeronautics, Technical Memorandums No. 634, Aug. 20, 1931, Washington, August 1931, pp. 12, diagrs.

- Versuche mit einem Absaugeflügel.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 9. Heft (15. Mai 1931), München und Berlin, pp. 259-264, ills., diagrs.

Schröder, Paul. Determination of resistance and trimming moment of planning water craft.

National Advisory Committee for Aeronautics, Technical Memorandums No. 619, May 7, 1931, Washington, May 1931, pp. 8, diagrs.

- The take-off of seaplanes, based on a new hydrodynamic reduction theory.

National Advisory Committee for Aeronautics, Technical Memorandums No. 621, May 21, 1931, Washington, May 1931, pp. 8, diagrs.

Schröder, Paul. Ein Übertragungsgesetz der Hydrodynamik und seine Anwendung bei der Untersuchung des Startes von Seeflugzeugen.

Zeitschr. Flugt. Motorluftseh., 22. Jahrg., 1. Heft (14. Jan. 1931), München und Berlin, pp. 8-12, ills., diagrs.

Schröer, Rudi. See Eisner, Fr. G. Sudeck, Rudi Schröer, und O. Zinke: Vergrösserung der effektiven Höhe von Flugzeugschleppantennen.

Schutt, Karl. Einführung in die Physik des Fliegens.

Berlin-Charlottenberg, C. J. E. Volekmann naehf. g. m. b. h. [1931], pp. 125, ills., diagr. Also in the series "Luftfahrt und Schule." Flugzeugbau und Luftfahrt, Heft 15.

Schulz, W. R. A German "Canard" aeroplane. Some notes on the characteristics of the Focke-Wulf "Ente" with construction details. Aircraft Engineering, Vol. 3, No. 24 (Feb. 1931), London, pp. 39-40, ills.

Schwarz, David. See Schaff er, Ernst: Glück ab; bahnbrecher der lüfte.

Schwarzler, Karl. Flugzuegkatapulte. Allgemeines, Berechnungen und Messungen.

Zeitschr. Flugt. Motorluftseh., 22. Jahrg., 14. Heft (28. Juli 1931), München und Berlin, pp. 425-428, ills., diagrs.

Schweizerische Luftverkehrs-Union. Offizieller Schweizerischer Flugplan. Hrsg. durch d. Informations- u. Propagandabureau d. Schweiz. Luftverkehrs-Union.

Zurieh, 1931.

Scientific progress. See Arnes, Joseph Sweetman: Glancing back at 1930. Scientific progress.

Scotland. On flying in Scotland.

Aeroplane, Vo. 40, No. 23 (June 10,1931), London, pp. 1073-1074,1076, 1078, 1080, ills.

Scott, C. W. A. Mr. Scott's record flight to Australia.

Aeroplane, Vol. 40, No. 15 (April 15,1931), London, p. 650.

- The out-and-home record.

Aeroplane, Vol. 40, No. 23 (June 10,1931), London, pp. 1081-1082, ill.

- See Hart, Edward J.: C. W. A. Scott.

Scott, F. P. Air Force training. Training in peace and war.

Flight, No. 1175, Vol. 23, No. 27 (July 3,1931), London, pp. xxvii-xxxi, ills.

- Training in peace and war.

Aeroplane, Vol. 41, No. 1 (July 1,1931), London, pp. 40-42, ills.

Scott, Merit. The effect of the presence of a grid upon certain characteristics of the airflow at the surface of an airfoil.

Physical Review, Vol. 37, No. 12 (June 15,1931), Minneapolis, p. 1701. (Abstract).

- The variation of the thermal boundary layer of a miniature airfoil.

Physical Review, Vol. 37, No. 8 (April 15,1931), Minneapolis, p. 1016. (Abstract).

Scott-Hall, S. Experiments on an Ape aeroplane fitted with pilot planes.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 838-842, ill., diagrs., tabls. Rep. Mem. No. 1273. (Ae. 419.)

- The spinning of aeroplanes.

Journ. Roy. Are. Soc, Vol. 35, No. 247 (July 1931), London, pp. 609-623.

- Stresses in wing structures. Accelerometer and incidence measurements

in various manceuvers.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 656-661, ills., diagrs. Rep. Mem. No. 1309. (Ae. 449.)

69261—35-17

Scroggs, A. F. See Nutt, A. E. Woodward, A. F. Scroggs, and E. Finn: Range of aircraft with air-cooled radial engine using altitude control.

Scudder, Nathan Frost. See Soule, Hartley Akin, and Nathan Frost Scudder: A method of flight measurement of spins.

Seadrome. See Fixel, Rowland, W.: The seadrome and international law.

Seaplane hulls. See Gerard, I. j.: A method of testing the strength of aircraft hulls.

- See Wigley, W. C. S.: Strength of wooden seaplane hulls (Full sized

machines—Third series).

Seaplanes. The design of sea-going aircraft. Parts I and II.

Aeroplane, Vol. 40, Nos. 2,3 (Jan. 14, 21,1931), London, pp. 71-72, 74, 76, 113-114, ills., diagrs.

- The development of long-range flying-boats.

Aeronautical Engineering, suppl. to the Airplane, Vol. 40, No. 4 (Jan. 28, 1931). London, pp. 151-152b, ills., diagrs.

- A novel seaplane installation. All-metal monocoque floats with longitudinal flutes and an aerofoil section spreader-bar.

Aircraft Engineering, Vol. 3, No. 31 (Sept. 1931), London, pp. 225-226, ills.

- Seaplanes.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 59-60.

- See Bradfield, F. B., and F. W. G. Greener: Wind tunnel test of the

increased drag of a quarter scale float on adding rivets.

- See Budig, F.: La stabilisation marine des hydravions par plans de dérive.

- See Collins, A. R.: A formula for the bouyancy of the wing floats of flying

boats and single float seaplanes.

- See Constantin, L.: Une possibilité d'augmentation de la charge payante

de certains hydravions.

- See Dornier: Entwurf eines Dornier-Rennflugbootes.

- See Dornier, Claude: Vorträge und abhandlungen aus dem gebiete des

flugzeugbaues und luftschiffbaues 1914-1930.

- See Fogg, Robert S.: Money-making seaplane operation.

- See Garner, H. M., and L. P. Coombes: The determination of the water

resistance of seaplanes.

- See Gouge, A.: Some aspects of the design of sea-going aircraft.

- See Gronau, W. v.: Seeflugzeug und Schiff.

- See Irving, H. B., and A. S. Batson: Spinning of a model of the Fairey Illf

seaplane.

- See K., A.: Seaplane bases.

- See K., A.: Seaplane float test basin.

- See Kean, John S.: Racing seaplanes.

- See Latécoère: Latécoère 38-0 flying boat (French). A long-range sesquiplane for carrying mail.

Seaplanes. See Lower, J. H.: Some notes on flying boats and seaplanes.

- See Mitchell, R. J.: Essais des maquettes d'hydravions au bassin des

carenes.

- See Moffett, William A.: The Schneider Seaplane Trophy—symbol of

speed supremacy in the air.

- See Munro, William: Hull design of flying boats.

- See Pabst, Wilhelm: Landing impact of seaplanes.

- See Pabst, Wilhelm: Über den Landestoss von Seeflugzeugen.

- See Piaggio: L'S 55 metallico.

- See Rennie, J. D.: The development of the long-range flying boat.

- See Saunders-Roe: The Saudners-Roe A7 flying boat.

- See Schnadel, Georg: Relations between ship design and seaplane design.

- See Schnadel, Georg: Zusammenhänge zwischen Schiffbau und Seeflugzeugbau.

- See Schneider trophy: The Schneider trophy contest.

- See Schneider trophy: The Schneider Trophy seaplane. Some notes on

the special features of the S. 6. B. with reasons for their incorporation.

- See Schröder, Paul: Determination of resistance and trimming moment

of planing water craft.

- See Schröder, Paul: The take-off of seaplanes, based on a new hydro-dynamic reduction theory.

- See Schröder, Paul: Ein Übertragungsgesetz der Hydrodynamik und

seine Anwendung bei der Untersuchung des Startes von Seeflugzeugen.

- See Seewald, Friedrich: Über Schwimmer und Schwimmerversuche.

- See Taub, Josef: Beitrag zur Frage der Belastungsannahmen für den

Landungsstoss von Seeflugzeugen.

- See Taub, Josef: Load assumption for the landing impact of seaplanes.

- See Tender: An all-metal tender for seaplanes.

- See Verduzio, R.: Sollecitazioni alia partenza ed all'ammaramento negli

idrovolanti.

- See Vest, John P. W.: Opportunities for seaplane flying on the Atlantic

coast.

- See Wagner, Herbert: Landing of seaplanes.

- See Wagner, Herbert: Über die Landung von Seeflugzeugen.

- See William Froude National Tank: Report on experiments with model

of seaplane float test with the S. 5 duralumin float. Model 807B.

Seats. See Hertel, Heinrich: Stefigkeit, Festigkeit und Beanspruchung von Anschnallgurten und Sesseln.

Seattle Public Library. List of books on aeronautics in the Seattle Public Library.

Seattle, Public Library, Technology Division, 1931, pp. 60.

Seed, D. See Spencer, K. T., and D. Seed: Comparison of calculated and measured elasticity of the wings of an aircraft, in connection with the investigation of wing nutter.

Seewald, Friedrich. Einige Probleme aus dem Arbeitsgebiet der Aerodynamischen Abteilung der DVL.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 1-22, üls., diagrs.

--Flugversuche mit Messenaben zur Bestimmung der aerodynamischen

Eigenschaften der Luftfahrzeuge.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 13. Heft (14. Juli 1931), München und Berlin, pp. 405-410, diagrs.

-Flutter in propeller blades.

National Advisory Committee for Aeronautics, Technical Memorandums No. 642, Oct. 14, 1931, Washington, October 1931, pp. 15, diagrs.

-On floats and float tests.

National Advisory Committee for Aeronautics, Technical Memorandums No. 639, Sept. 24, 1931, Washington, September 1931, pp. 25, diagrs.

-Über die Schwingungserscheinungen an Luftschrauben.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 12. Heft (29. Juni 1931), München und Berlin, pp. 369-374, ills., diagr.

-Über Schwimmer und Schwimmer versuche.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 9. Heft (15. Mai 1931), München und Berlin, pp. 265-276, 111., diagrs.

Seewald, Friedrich, und Walter Feucht. Versuchsfahrten mit einem schnellfahrenden Schienenfahrzeug mit Luftschraubenantrieb.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 22. Heft (28. Nov. 1931), München und Berlin, pp. 667-671, ills.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 59-63, ills., diagrs.

Segal, Paul M. The regulation of amateur radio communciation. Air Law Review, Vol. 2, No. 2 (April 1930), New York, pp. 153-206.

Seguin, L. et A. Étude de hélices, des injecteurs et des moteurs en fonctionnement par la méthode stroboscopique et par le photographie au millionième de seconde.

L'Aéronautique, 13me année. No. 143, Bulletin l'Aérotechnique, 9e année, No. 100 (avril 1931), Paris, pp. 132-135, ills.

Seiferth, R. Berechnung von Luftschrauben und Vergleich mit Versuchsergebnissen.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 3. Heft (14. Feb. 1931), München und Berlin, pp. 73-76, ills., diagrs.

Seiliger, M. Les moteurs Diesel sans compresseur et les moteurs semi-Diesel. Traduit de l'allemand par A. Schubert. Paris, Libr. Dunod, 1931, pp. xiii, 471.

Selga, Miguel. The velocity of the wind at Manila, Baguio, Iloilo and Cebu. Manila, Bureau of Printing, 1931, pp. 35, ills., tabls., diagrs.

Sempill, Colonel, the Master of (William Francis Forbes-Sempill). The air and the plain man.

London, E. Mathews & Marrot, 1931, pp. 134, ill. The library of new ideas, No. 3.

Senkowski. Spadochrony.

Instytut Badan Technicznych Lotnictwa, Sprawozdanie, KwartalneNr. 1, Warszawa, 19—.

Seno (Dal), Guido. I modelli volanti; teorie, costruzioni, esperienze. Torino, r. Aero club d'Italia a aero club G. Lisa (Restelli), 1931, pp. 119.

Serragli, G. Un singulare sistema di regolazione del passo delle eliche.

L'Aerotechnica, Vol. 11, n. 3 (marzo 1931), Roma, pp. 310-317, diagrs., tabl. English abstract, p. 391.

-Il moto di un molinello a pale orientabili posto in una corrente variabile.

L'Aerotecnica, Vol. 11, n. 5 (mag. 1931), Roma, pp. 557-570, diagrs., tabl. English abstract pp. 694-695.

Servies, Julien. See Blanchet, Georges: Personnalités contemporaines. Julien Servies.

Servo. See Hartshorn, A. S.: The application of the Servo principle to aileron operation.

Settle, T. G. W. Some recent aspects of rigid airships. Particulars regarding the Zeppelin type of metal-structure, fabric-covered, rigid airship and its British and American derivitives, with special reference to the structure, outer cover, gas cells, lifting gases, engines, power transmissions, and fuels, and to the naval and commercial roles of airships.

Mech. Eng., Vol. 53, No. 8 (Aug. 1931), New York, pp. 567-574, ills.

Seydel, Edgar. Beitrag zum Gewichtsvergleich zwischen dreigurtigem und viergurtigem Flechtwerk.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 12. Heft (29. Juni 1931), München und Berlin, pp. 362-366, ills., diagrs.

Jahrbuch 1931 der Deutschen Versuchsanstalt fur Luftfahrt, E. V., München und Berlin, 1931, pp. 305-308, diagrs.

-Beitrag zur Berechnung viergurtiger Flechtwerke.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 289-304, ills., diagrs., tabls.

-Elastizitätstheorie des starren Luftschiffs.

Luftfahrtforschung, Vol. 9, No. 2, 1931, pp. 57-84.

-Schubknickversuche mit Wellblechtafeln.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 13. Heft (14. Juli 1931), München und Berlin, pp. 410-411, ill.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 233-245, ills., ditgrs., tabls.

-Wrinkling of reinforced plates subjected to shear stresses.

National Advisory Committee for Aeronautics, Technical Memorandums No. 602, Jan. 26, 1931, Washington, January 1931, pp. 59, diagrs., tabls.

Seydel, Jos. Hanbuch für den Luftschutz: eine Zusammenstellung wissenswerter einzelheiten.

Diessen vor München, Verlag Jos. Huber, 1931, pp. 119, ills.

Seymour, L. D. Maintenance of transport equipment.

Airway Age, Vol. 13, No. 5 (Aug. 1, 1931), New York, pp. 119-121.

Severino, Giuseppe. Sulle determinazioni di posizione con una sola osservazione d'altezza.

Riv. Aer., Anno 7, n. 9 (sett. 1931), Roma, pp. 496-509, diagrs. Sextant. See Tenani, M.: Un nuovo tipo di sestante per aeronautica.

Sexton, Russell W. Lambert—St. Louis airport.

Aero Digest, Vol. 19, No. 3 (Sept. 1931), New York, pp. 70, 94, ill.

-Lambert-St. Louis municipal airport of 1931.

U.S. Air Services, Vol. 16, No. 5 (May 1931), Washington, pp. 32-33, ills.

Sezawa, Katsutada, and Kei Kubo. The buckling of a cylinder shell under torsion.

Report of the Aeronautical Research Institute, Tòkyo Imperial University, No. 76 (Vol. 6,10), (Dec. 1931), Tokyo, pp. 251-314, ills., diagrs., tabls.

Sezawa, Katsutada. On the buckling under edge thrusts of a rectangular plate clamped at four edges.

Report of the Aeronautical Research Institute, Tokyo Imperial University, No. 69 (Vol. 6, 3), (April 1931), Tokyo, pp. 45-59, diagrs.

-On the lateral vibration of a rectangular plate clamped at four edges.

Report of the Aeronautical Research Institute, Tokyo Imperial University, No. 70 (Vol. 6, 4), (April 1931), Tokyo, pp. 61-70 diagrs.

Sezawa, Katsutada, and Genrokuro Nishimura. Stresses under tension in a plate with a heterogeneous insertion.

Report of the Aeronautical Research Institute, Tòkyo Imperial University, No. 68 (Vol. 6, 2), (April 1931), Tokyo, pp. 25-43, diagrs.

S-40. See Klemin, Alexander: Sikorsky's contribution to huge amphibions—the S-40.

-See Sikorsky: The Sikorsky S-40 amphibion.

Sgarbi, Giuseppe. Importanza dell'esame psicologico nella scelta dei piloti. Riv. Aer., Anno 7, N. 11 (nov. 1931), Roma, pp. 259-292, diagr., tabi.

Shafts. See Capetti, A.: Sul calcolo dei periodi di oscillazione torsionale libera degli alberi.

Sharp, Edward R. An air journey de luxe.

Nat. Aer. Mag., Voi. 9, No. 12 (Dee. 1931), Washington, pp. 8-10, ills.

Shaw, B. Russell. Foresight in airport design.

Aviation, Vol. 30, No. 5 (May 1931), New York, p. 308.

Shaw, Sir Napier. Manual of meteorology: Vol. IV: Meteorological calculus: Pressure and wind.

Cambridge, University Press, Macmillan, pp. öö, 359. Vol. Ill, published in 1930.

Shearing. See Seydel, Edgar: Schubknickversuche mit Wellblechtafeln.

Sherlock, R. H., and M .B. Stout. An anemometer for a study of wind gusts.

Department of Engineering Research, University of Michigan, Ann Arbor, Engineering Research Bulletin, No. 20, May 1931, pp. 38, ills., diagrs.

Sherman, William F. Aeronautics at the University of Detroit.

National Glider and Airplane News, Vol. 3, No. 2 (Sept. 1931), New York, pp. 11-12, 62, ills.

Shock absorbers. See Akron: Shock absorbers in the Akron.

Shortal, Joseph Adams. See Wenzinger, Carl Joseph, and Joseph A. Shortal: The aerodynamic characteristics of a slotted Clark Y wing as affected by the auxiliary airfoil position.

Siam. A Siamese air line.

Flight, No. 1185, Vol. 23, No. 37 (Sept. 11,1931), London, p. 927, ill.

Sibour, Vicomte de. Rapport sur un voyage de Paris à Pékin. l'Aérophile, 39e année, No. 12 (15 dèe. 1931), Paris, pp. 362-363.

Sibour, Vicomte de. Un voyage.

L'Aerophile, 39e année, No. 1 (15 jan. 1931), Paris, pp. 9-11, ills.

Sideslip. See Fuchs, Richard, and Wilhelm Schmidt: The dangerous sideslip of a stalled airplane and its prevention.

Siemen. Siemens flygmotorer.

Flygning, irg. 9, N:R 7 (Juli 1931), Stockholm, pp. 132-133, ills.

Signs. Air signs.

Flight, No. 1174, Vol. 23, No. 26 (June 26,1931), London, p. 579.

Sikorsky. The Sikorsky S-40 amphibion.

Aero Digest, Vol. 19, No. 3 (Sept. 1931), New York, pp. 66-67, ills. Aviation, Vol. 30, No. 10 (Oct. 1931), New York, pp. 594-598, ills.

- See Wind tunnels: Why a vertical wind tunnel.

Sikorsky, Igor. See Mounier, P. J. J.: Igor Sikorsky en zijn amphibievlie-gtuigen.

- See Olshevsky, Dimitry E.: A new vertical wind tunnel.

Silk. See Tanahashi, Keizo: Physical properties of raw silk.

Silva, Camillo. La tecnica construttiva degli aeroplani. Torino, G. Lavagnolo, 1931, pp. 301, ills.

Silver. See Gough, H. J., and H. L. Cox: Mode of deformation of a single crystal of silver.

Silvestri, Armando. I metalli leggeri all' esposizione e Congresso Internazionale di Fonderia.

Riv. Aer., Anno 7, N. 12 (die. 1931), Roma, pp. 499-513, ills.

- L'ultimo dirigibile italiano.

Riv. Aer., Ano 7, N. 9 (sett. 1931), Roma, pp. 478-484, ills.

Simmons, L. F. G. Experiments relating to the flow in the boundary layer of an airship model.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 198-204, diagrs. Rep. Mem. No. 1268 (Ae. 414.).

Simmons, L. F. G., and N. S. Dewey. Wind tunnel experiments with circular discs.

Aer. Res, Comm., Rep. Mem., No. 1334, (Ae. 467), February 1930, London, 1931, pp. 6, ills., diagr.

Simon, Sir John Allsebrook. See Great Britain: Report of the R. 101 inquiry. Presented by the Secretary of State for air to Parliament by command of His Majesty, March 1931.

- See R 101: R 101 Simon inquiry report. Disaster due to loss of gas.

- See R 101: The Simon report on R 101.

Sims, C. A. British aircraft illustrated.

London, A. & C. Black, ltd., 1931, pp. 95, ills.

Sinbad the Sailor. The contest from afloat.

Flight, No. 1186, Vol. 23, No. 38 (Sept. 18,1931), London, pp. 942-950. ill.

Siskin aircraft. See Jennings, W. G.: Tests of various controls fitted to a Siskin aircraft.

Skan, Sylvia W. See Cowley, W. L., and Sylvia W. Skan: A simplified analysis of the stability of aeroplanes.

- See Cowley, W. L., and Sylvia W. Skan: A study of polynomial equations.

Skan, Sylvia W. See Falkner, V. M., and Sylvia W. Skan: Some approximate solutions of the bounary layer equations.

Skerry, E. Notes on the proof stress. A practical article on the meaning and use of the new method of testing material.

Aircraft Engineering, Vol. 3, No. 29 (July 1931), London, p. 162, diagr.

Skin friction. See Fage, A., and V. M. Falkner: Relation between heat transfer and surface friction for laminar flow.

Slip phenomena. See Gough, H. J., and H. L. Cox: Mode of deformation of a single crystal of silver.

Slot, T. E. Ter nagedachtenis van H. Hindriks.

Het Vliegveld, 15de Jaarg., No. 7 (Juli 1931), Amsterdam, p. 231, ill.

Slots. See Haus, Fr.: Partances élevées et profils hypersustentateurs.

- See Haus, Fr.: L'utilisation pratique des procédés d'hypersustentation.

- See Jennings, W. G.: Experiments in lateral control. An account of tests

with autoslots and interceptor and spoiling devices on the same aircraft.

- See Jones, F. T.: Flight tests on an Atlas fitted with automatic slots

connected with the ailerons and some data relevant to the design of auto-slots for R.A.F. 28 section wing.

- See Jones, E. T., and C. E. Maitland: Stalled flight tests of a Moth fitted

with auto control slots and interceptors.

- See Soulé, Hartley Akin: The effect of slots and flaps on the lift and drag

of the McDonnell airplane as determined in flight.

- See Town end, H. C. H.: A study of slots, rings & boundary layer control

by blowing.

- See Townend, H. C. H.: A study of slots, rings and jet control of the

boundary layer.

Slotted wings. See Alston, R. P.: Stalled flight tests on a Bristol fighter fitted with auto control slots and interceptors.

- See Clark, K. W.: The motions, at a stall, of a Bristol fighter aeroplane

with slot and aileron control on both planes.

- See Haus, Fr.: The use of slots for increasing the lift of airplane wings.

- See Pleines, Wilhelm: Flugmessungen über den Einfluss von Hadley-

Page-Schlitzquerrudern.

- See Schrenk, Oskar: Versuche mit einem Absaugeflügel.

- See Wings: L'ala a fessura e la sicurezza aerea.

Smith, Elinor. See Records: Nouveaux records homologués par la F.A.I.

Smith, Wesley Leland. Air transport operation.

New York and London, McGraw-Hill Book Company, inc., 1931, pp. ix, 316, ills., diagrs.

Smithowski, John G. Construction and care of storage batteries.

Aviation Engineering, Vol. 5, No. 5 (Dec. 1931), Washington, N.J., pp. 43-44.

Smoke. See Whytlaw-Gray, R., and H. S. Patterson: Smoke. A study of aerial disperse systems.

Smoke pots. Smoke pots and other airport aids.

Western Flying, Vol. 10, No. 5 (Nov. 1931), Los Angeles, Calif., p. 19, ills.

Smoke screens. See Birnn, Roland: Smoke screens from the sky.

Smoke-screen material. See United States, Office of Chief of Air Corps: Instructions for handling titanium tetrachloride, smoke-screen material. Prepared under direction of the Chief of Air Corps.

Snijders, C. J. Nederland's plaats in het wereldluchtverkeer.

Het Vliegveld, 15de Jaarg., No. 9 (Sept. 1931), Amsterdam, p. 312.

Snowden Gamble, Charles Frederick. The air weapon, being some account of the growth of British military aeronautics from the beginnings in the year 1783 until the end of the year 1929.

London, H. Milford, Oxford University Press, 1931, pp. 300.

Soaring. Une réglementation très complète du vol sans moteur, vient d'être établie en Suisse.

L'Aérophile, 39e année, No. 4 (15 avril 1931), Paris, pp. 113-114, ill.

- Richtlinien für den Bau von Gleit- und Segelflugzeugen. Bearbeitet von

der Technischen Kommission der Rhön-Segelflug-Wettbewerve.

Frankfurt a.M., Selbstverlag der R.R.Q., pp. 27.

- Le vol remorqué.

L'Aérophile, 39e année, No. 10 (15 oct. 1931), Paris, p. 206, ills.

- See Barnaby, Hattie Meyers: Let's go to the Elmira soaring meet!

- See Bartocci, Enzo: Rassegna delle teorie enunciate e degli studi svolti

sino ad oggi sul volo a vela.

- See Bossolasco, Mario: La meteorologia ed il volo a vela.

- See Debus, W.: Mit zehn Liter Benzin von Köhn zum Bodensee? Das

kommende Volksflugzeug.

- See Dominicus, D.: Warum Gleit- und Segelflug in Deutschland?

- See Falke: Das Segelflugzeug "Falke" der R.R.G.

- See Fuchs, Otto: Segelflug in der Ebene.

- See Georgii, Walter: Bericht über den 11. Rhön-Segelflug-Wettbewerb.

- See Georgii, Walter: Eleventh Rhön soaring-flight contest.

- See Gliding.

- See Groenhoff, Gunther: 265 km motorlos.

- See Heibig, Hans: Jahres-Statistik 1930 (vom 1. 1. bis 31. 12. 1930) des

Jugend- und Segelflugausschusses des DVL.

- See Hentschel: Neuer Segelflug-Record auf dem Dörnberggelände bei

Kassel: 11 Std. 1. Min.

- See Hirth, Wolfram K. E., Martin H. Schempp, and Jack Herrick: Elmira

soaring contest, 1930.

- See Italiaander, Rolf: So lernte ich Segelfligen.

- See Kronfeld, Robert: Wärmesegeln, ein neuer Flugsport.

Soaring. See Maas, H. J. van der: Bezoek aan Rossitten en wasserkuppe.

- See Matthias, Joachim: Das neue Segelfluglager auch über der Nordsee.

- See O'Meara, J. K. (Jack): The 1931 Rhoen soaring contest at the

Wasserkuppe.

- See Patterson, John McClure: At the famous Wasserkuppe.

- See Roseck, Erich: Segelflygning—Trysklands nyaste sport.

- See Schempp, Martin: Cloud hopping in soaring flight.

- See Stoklitzky, von: Segelflug-Wettbewerb 1929 in der UdSSR.

- See Taub, Josef: Beitrag zur Frage der Belastungsannahmen für den

Landüngsstoss von Segelflugzeugen.

- See Walker, Donald F.: Bringing soaring up-to-date.

- See Wateau, André: Le programme du vol sans moteur en France.

- See Winkler, Horst: Das Hochleistungs-Segelflugmodell.

Società Anonima Rilevamenti Aerofotogrammetrici. Rome. Il metodi aerofotogrammetrico "Nistri" e le sue—pratiche applichezioni.

Society of Automotive Engineers. Structural problems and the S.A.E. Aviation, Vol. 30, No. 10 (Oct. 1931), New York, pp. 591-593, diagrs.

Sokolcow, Dymitry, i Jerzy Bylewski. Wyniki 2 serji badan nad rozchod-zeniem sie fai krótkich.

Instytut Badán Technicznych Lotnictwa, Sprawozdanie kwartalne Nr. 5 (Nr. 22), War-szawa, 1931, pp. 29-54, ills., diagrs., tabls., map.

Sonntag. Der Freiballonsport in Zahlen.

Luftschau, 4. Jahrg., Nr. 5 (10. März 1931), Berlin, p. 37.

Soriano y Viguera, J. La moderna fotogrametría automática.

ibérica, Año 18, Núm. 875 (25 abril 1931), Barcelona, pp. 264-269, ill.

Soulé, Hartley Akin. The effect of slots and flaps on the lift and drag of the McDonnell airplane as determined in flight.

National Advisory Committee for Aeronautics, Technical Notes No. 398, Nov. 10, 1931, Washington, November 1931, pp. 12, ills., diagrs., tabls.

Soulé, Hartley Akin, and Nathan Frost Scudder. A method of flight measurement of spins.

National Advisory Committee for Aeronautics, Report No. 377, May 23, 1931, Washington, U.S. Government Printing Office, 1931, pp. 18, ills., diagrs., tabls.

Soulé, Hartley Akin. See Miller, Marvel P., and Hartley A. Soulé: Moments of inertia of several airplanes.

Sound. See Hart, Morris D.: The aeroplane as a source of sound.

- See Parker, A. E.: Horsepower at speed of sound.

- See Theodorsen, Theodore: A new principle of sound frequency analysis.

Sounding Balloons. See Samuels, L. T.: Sounding-balloon releasing device.

Soundproofing. See United States Department of Commerce, Aeronautics Branch: Reduction of airplane noise. October 1, 1930.

South Africa. Verordnung. Luftfahrtverordnung vom 9. August 1929.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 13-14 (4. April 1931), Berlin, pp. 90-91.

South America. British activities in South America.

Aeroplane, Vol. 40, No. 15 (April 15, 1931), London, pp. 677-678, 680, ills.

- Per vliegtuig van Zuid-naar Noord Amerika.

Het Vliegveld, 15de Jaarg., No. 5 (Mei 1931), Amsterdam, pp. 160-163, ills., map.

South Pole. See Byrd, Richard Evelyn: Little America: Aerial exploration in the Antarctic and the flight to the South Pole.

Southern Aircraft. The metal " Martlette."

Flight, No. 1167, Vol. 23, No. 19 (May 8, 1931), London, p. 399, ills.

Southampton seaplane. See Crough, A. S.: Measurement of lift and drag of Southampton seaplane.

Southwell, R. V., and Letitia Chitty. On the problem of hydrodynamic stability.—I. Uniform shearing motion in a viscous fluid.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 81-134, diagrs. Rep. Mem. No. 1200.

Southwell, R. V. See Chitty, L., and R. V. Southwell: A contribution to the analysis of primary stresses in the hull of a rigid airship.

Spain. Verordnung betreffend den Betrieb der Hilsflughäfen Kap Juby und Villa Cisneros.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 10-11 (14. März 1931), Berlin, pp. 67-63.

Spanish America. El progresó de la aviación en la América española.

Ibérica, Año 18, Núm. 864 (7 feb. 1931), Barcelona, pp. 83-85.

- See International American Conference: Commercial aviation. Convention between the United States of America and other American Republics. Signed at Habana, February 20, 1928.

Spanner, Edward Frank. The tragedy of "R. 101".

London, E. F. Spanner, 1931, 2 vols., ills., maps, diagrs.

Spannhake, W. Kreiselpumpen and Turbinen.

Wien, W., und F. Harms: Handbuch der Experimentalphysik, Bd. 4, 3. Teil. Hydro-und aerodynamik, Leipzig, Akademische Verlagsgesselschaft m.b.H., 1930, pp. 265-319, ills.

Spanogle, J. A., and H. H. Foster. Basic requirements of fuel-injection nozzles for quiescent combustion chambers.

National Advisory Committee for Aeronautics, Technical Notes No. 382, June 23, 1931, Washington, June 1931, pp. 6, diagrs.

Spanogle, J. A., and G. T. Hemmetee. Development of an impinging-jet fuel-injection valve nozzle.

National Advisory Committee for Aeronautics, Technical Notes No. 372, April 21, 1931, Washington, April 1931, pp. 9, ills., diagrs.

Spanogle, J. A., and E. G. Whitney. The effectiveness of a double-stem injection valve in controlling combustion in a compression-ignition engine.

National Advisory Committee for Aeronautics, Technical Notes No. 402, Dec. 15, 1931, Washington, December 1931, pp. 19, diagrs.

Spanogle, J. A., and H. H. Foster. Fuel injection of Diesel engines. Performance of a high-speed compression ignition engine using multiple-orifice fue] injection nozzles.

Aircraft Engineering, Vol. 3, No. 23 (Jan. 1931), London, pp. 19-21, ills., diagrs.

Spanogle, J. A., and C. S. Moore. Performance of a compression-ignition engine with precombustion chamber having high-velocity air flow.

National Advisory Committee for Aeronautics, Technical Notes No. 396, Nov. 14, 1931, Washington, October 1931, pp. 15, ills., diagrs.

Spark plug. See King, R. O., and H. Moss: Detonation, spark-plug position, and engine speed.

Sparks, Reginald Brabant. See Wingfield, Lawrence Arthur, and Reginald Brabant Sparks: The law in relation to aircraft.

Spars. See Struts.

- See Swickard, Andrew E.: Metal-truss wing spars.

- See Williams, D.: A graphical method of stressing aeroplane spars.

Speed. Calculating maximum speed of airplanes.

Aviation, Vol. 30, No. 1 (Jan. 1931), New York, pp. 55-57.

- See Courtney, Frank T.: Speed in air transport.

- See Dupuy, P.: Aeroplane speed characteristics. An attempt to elucidate

theory in practical terms for the aeroplane pilot.

- See Jennings, W. G.: "Cornering" at high speeds.

- See Peters, H.: Effect of viscosity in speed measurements with double-thrust venturi tubes.

- See Pistolesi, E.: Correnti e azioni dinamiche a velocitä molto elevate.

- See Races: Speed and the races.

- See Schneider trophy: 379 miles per hour.

- See Stainforth, G. H.: Speed's new "High"; 404 miles per hour.

- See Taylor, G. I.: The flow of air at high speeds past curved surfaces.

- See Weems, Philip Van Horn: The Gatty ground speed and drift indicator.

-- See Wertenson, F.: Development of the high-speed all-wing monoplane.

- See Wimperis, H. E.: High-speed flying.

Speed indicators. Record engine speed indicators.

Flight, No. 1187, Vol. 23, No. 39 (Sept. 25, 1931), London, pp. 869-870, ills.

Speed measurement. See Dzwonkowski, Kazimierz: Sondy do powiaröw szybkoäci samolotu.

Spencer, K. T. On the effect of altitude upon the distance required for an aircraft to take off and climb 20 meters giving generalized curves of weight reduction necessary if a given aircraft is to comply with the requirements of A.P. 1208 under adverse atmospheric conditions.

Aeronautics, Techn, Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 531-539, diagrs., tabl. Rep. Mem. No. 1307. (Ae. 447.)

Spencer, K. T., and D. Seed. Comparison of calculated and measured elasticity of the wings of an aircraft, in connection with the investigation of wing flutter. Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 647-655, diagrs., tabls. Rep. Mem. No. 1257. (Ae. 406).

Spinning. Safety in spinning.

Flight, No. 1195, Vol. 23, No. 47 (Nov. 20, 1931), London, pp. 1159-1160.

Spinning Spinning.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 33-35.

- See Batson, A. S., H. B. Irving, and S. B. Gates: Spinning experiments on

a single seater fighter. Part I.—Further model experiments, by A. S. Batson and H. B. Irving; Part II.—Full scale spinning tests, by S. B. Gates.

- See Irving, H. B., A. S. Batson, and A. L. Maidens: Rolling and sideslip

experiments on a model slotted biplane of R. A. F. 31 section.

- See Irving, H. B., and A. S. Batson: Spinning of a model of the Fairey

Illf seaplane.

- See Scott-Hall, S.: The spinning of aeroplanes.

- See Stephens, A. V.: Free-flight spinning experiments with several models.

- See Stephens, A. V.: Free model spinning researches. Experiments in the

balloon shed at Farnborough and a description of the vertical wind tunnel.

- See Williams, D.: Forces on the engine mounting of a spinning aircraft.

- See Wright, K. V.: Experiments on the spinning of a Bristol fighter aeroplane.

Spin. See Fuchs, Richard, and Wilhelm Schmidt: The dangerous flat spin and the factors affecting it.

- See Fuchs, Richard, and Wilhelm Schmidt: The steady spin.

- See Gates, S. B.: Measured spins on aeroplane H.

- See Soulé, Hartley Akin, and Nathan Frost Scudder: A method of flight

measurement of spins.

Spit, G. Amsterdam-Batavia met Zeppelins.

Het Vliegveld, 15de Jaarg., No. 4 (April 1931), Amsterdam, pp. 124-125.

Sprigg, Christopher. The airship, its design, history, operation and future.

London, S. Low, Marston & Co., ltd., 1931, pp. viii, 248, ills.

- See Davis, H. D., and C. Sprigg: Fly with me.

Springs. See Zoja, R.: Sul calcolo delle molle per valvole dei motori d'aviazione. Spruce. See Kozanecki, Stefan: Badanie éwierka górskiego z Worochty.

- See Laski, Jaroslaw: Badanie éweirka górskiego z Worochty.

S. 6 B. See Vickers: The supermarine S. 6 B monoplane. Main particulars published for the first time.

S. 64. Relazione finale della commissione d'inchiesta sull'incidents dell'apparecchio S. 64.

Riv. Aer., Supplemento, Anno. 7, n. 8 (agosto 1931), Roma, pp. 121, ills.

Stability. Stability and control.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 28-32.

- See Anxionnaz, René: Stabilisateur. Brevet français, n. 165,203, déposé

le 20 octobre 1922, par M. René Anxionnaz.

--See Bryant, L. W., and A. S. Halliday: Measurement of lateral derivatives

of the whirling arm.

- See Budig, F.: La stabilisation marine des hydravions par plans de dérive.

Stability. See Cowley, W. L., and Sylvia W. Skan: A simplified analysis of the stability of aeroplanes.

- See Cowley, W. L., and Sylvia W. Skan: A study of polynomial equations.

- See Glauert, H.: The force and moment on an oscillating aerofoil.

- See Glauert, el: The stability of a body towed by a light wire.

- See Halliday, A. S., and C. H. Bürge: Lateral stability calculations for the

Bristol fighter aeroplanes.

- See Halliday, A. S.: Stability derivatives of the Bristol fighter.

- See Haus, Ch.: Stabilité et maniabilité des avions.

- See Haus, Frédéric Ch.: Stabilité et maniabilité des avions.

- See Hübner, Walter: Ergebnisse von Messungen der Stabilität um die

Querachse.

- See Jennings, W. G.: Directional stability of high speed aircraft.

- See Jones, E. T.: The full scale determination of the lateral resistance derivatives of the Bristol fighter aeroplane. Part III.—The determination of the rate of roll derivatives.

- See Jones, E. T.: The lateral stability of the Gloster HIB seaplane with

controls fixed and with directional control.

- See Jones, E. T., and R. P. Alston: Longitudinal control and stability

when stalled.

- See Kiel, Heinrich Georg: Static longitudinal stability of "Ente" airplanes.

- See Lapresle, A.: The aerodynamic wind vane and the inherent stability

of airplanes.

- See Margoulis, W.: Le prix de la stabilité longitudinale de l'avion et du

"canard."

- See Marmonier, L.: La stabilité e il comando automatico dei velivoli.

- See Marmonier, L.: La stabilité et la direction automatiques des avions.

- See Minelli, Carlo: Sull'equilibro longitudinale del velivokT ad ala de-

formable.

- See Töpfer, Carl: Auftriebsverteilung und Längsstabilität.

- See Töpfer, Carl: Lift distribution and longitudinal stability.

Stack, John. Tests in the variable density wind tunnel to investigate the effects of scale and turbulence on airfoil characteristics.

National Advisory Committee for Aeronautics, Technical Notes No. 364, Feb. 10, 1931, Washington, February 1931, pp. 15, ill., diagrs.

Stagger-decalage. See Merrill, Albert A.: The stagger-decalage biplane.

Staiilberg, Max. Organisation und betriebswirtschaftliche Grundprobleme der deutschen Handelsluftfahrt.

Hofheim, Buchdruckerei Mitter & Kinkel, 1931, pp. 106.

Stainforth, G. H. Speed's new "High": 404 miles per hour.

The Literary Digest, Vol. 110, No. 13 (Sept. 26, 1931), New York, pp. 38-39, port.

Stainforth, G. H. See Records: Four hundred miles an hour.

Stainless steel. Stainless steel airplane.

Aero Digest, Vol. 19, No. 6 (Dec. 1931), New York, p. 60, ill.

Stalker, Edward Archibald. Principles of flight; a college text on aeronautical engineering.

New York, The Ronald Press Company, 1931, pp. xviii, 428, ills., diagrs.

Stall. See Barros: The Barros stall warning device.

- See Control and Stability.

- See Control: Control beyond the stall.

Stalled flight. See Alston, R. P.: Stalled flight tests on a Bristol fighter fitted with auto control slots and interceptors.

Stalling. See Clark, K. W.: The motions, at a stall, of a Bristol fighter aeroplane with slot and aileron control on both planes.

- See Jones, E. T., and R. P. Alston: Longitudinal control and stability

when stalled.

Stamer, Fritz. Gleit- und segelflugschulung.

Berlin-Charlottenburg, C. J. E. Volckmann nachf. g. m. b. h. [1931], pp. 48, ills. Flugzeugbau und Luftfahrt, Heft 17.

Stamer, Fritz, und A. Lippisch. Gleitflug und Gleitflugzeuge. Teil II. Bauanweisungen und Bauzeichnungen.

Berlin-Charlottenburg, Verlag C. J. E. Volckmann Nachf. G. m. b. H., 1931, pp. 24, ills. Heft 12 der Sammlung Flugzeugbau und Luftfahrt.

Stamer, Fr. Die Wasserkuppe im Jahre 1931.

Luftschau, 4. Jahrg., Nr. 24 (24. Dez. 1931), Berlin, pp. 136-137.

Stanavo Specifications Board, Inc. Stanavo pilot's handbook.

New York, Stanavo Specifications Board, inc., 1931, pp. 88, maps., tabls.

Standard Oil Company of California. Landing fields of the Pacific west. San Francisco, 1931, pp. 99, ills., mapi.

Standards. See Army-Navy: A N standards conference.

- See British Standards Institution: British Standards Institution.

Stanhope, T., and A. Thompson. Who's who in British aviation, 1931. London, Airways Publications, Ltd.

Stanley, Charles M. Modern parachutes.

The Take-Off, Vol. 3, No. 1 (March 1931), Washington, p. 4.

Stanton, T. E. On the distribution of pressure over a symmetrical Joukowski section at high speeds.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 294-296, ills., diagrs., tabl.

- Tests under conditions of infinite aspect ratio of 4 aerofoils in a high

speed wind channel.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 290-293, diagrs., tabls. Rep. Mem. No. 1279 (Ae. 425).

- Velocity in a wind channel throat.

Aer. Res. Comm., Rep. Mem., No. 1388 (Ae. 510-T. 2956), May 1930, London, 1931, pp. 3, diagrs., tabl.

Stapp, James Adair. Public altitude flights make busy airports.

Airway Age, Vol. 13, No. 1 (Jul. 4, 1931), New York, pp. 49-50, ills.

Stark, Howard Cyrus. Blind or instrument flying? Instruction book. Newark, N.J., 1931, pp. 31, ills.

Statax. See Hansen, F.: Der Statax-Halbdiesel-Flugmotor.

Statics. See Thalau, Karl: Aufgaben der Luftfahrzeug-Statik.

Statistics. See Byoir, Carl: Graphic facts about aviation. March 1, 1931. Compiles by Carl Byoir & associates.

Steel. See Handasyde, G. H.: Steel tube and strip. The works of Armstrong-Whitworth aircraft at Coventry visited and described.

- See Hartmann, E. C: Comparison of weights of 17ST and steel tubular

structural members used in aircraft construction.

- See Hatfield, W. H.: Rustless steels as applied to automobiles and

aircraft.

- See Lafont, A.: Aceros para aviación y automovilismo.

- See Nakanishi, Fujio: On the yield point of mild steel.

Steel, W. A. Communication on civil airways in Canada.

Engineering Journal, Vol. 14, No. 7 (July 1931), pp. 409-415, ills.

Steel beams. See Knerr, H. C, and H. A. Backus: Development of steel wing beams for aircraft.

Steele, Dudley. Searching from the air.

Western Flying, Vol. 9, No. 5 (May 1931), Los Angeles, Calif., pp. 32-34, ills.

Steele, Dudley M. The closed course events at the National Air Races. Western Flying, Vol. 10, No. 4 (Oct. 1931), Los Angeles, Calif., pp. 14-15.

- Using the airplane for business purposes.

Aero Digest, Vol. 18, No. 1 (Jan. 1931), New York, pp. 50-51, 122, ills.

Steewen, O. P. van. Von der photographischen Flinte zum kinematographi-schen Maschinengewehr.

Die Umschau, 35. Jahrg., Heft 41 (lO.Okt. 1931), Frankfurt a.M., pp. 818-819, ills.

Steiner, Hans. Der Fallschirm als rettungsmittel, zum lastenabwurf und seine Verwendung als flugzeugsicherung.

Berlin, R. C. Schmidt & Co., 1931, pp. vii, 107, ills. Bibliothek für Luftschiffahrt und Flugtechnik, Bd. 28.

Steinhauer, Earl. Rambling reminiscence and right up to date.

U.S. Air Services, Vol. 16, No. 11 (Nov. 1931), Washington, D.C., pp. 19-21.

Stelzer, E. See Dobrowolny, Otto, and E. Stelzer: Der menschliche Aug; eine gemeinverständliche darstellung mit einer führung durch die abteilung "Luftfahrt" des Technischen museums in Wien.

Stephen, von. Generalpostmeister Dr. von Stephen und die Luftfahrt. Luftschau, 4. Jahrg., Nr. 1 (10. Jan. 1931), Berlin, p. 6.

Stephens, A. V. Free-flight spinning experiments with several models.

Aer. Res. Comm., Rep. Mem., No. 1404 (Ae. 525-Spin 62), April 1931, London, 1931, pp. 12, ills., diagrs., tab!.

- Free-model spinning researches. Experiments in the balloon shed at

Farnborough and a description of the vertical wind tunnel.

Aircraft Engineering, Vol. 3, No. 31 (Sept. 1931), London, pp. 213-215, ills.

Stereogoniometer. See Hotine, Martin: The Fourcade stereogoniometer.

Stern, W. J. See Nayler, J. L., and E. Ower: Aviation of to-day; its history and development; with a chapter on aircraft engines by W. J. Stern.

Steven, A. W. Flying the "Hump" of the Andes.

National Geographic Magazine, Vol. 59, 1931, Washington, D.O., pp. 595-636.

Stevens, Frederick Wiley. The gaseous explosive reaction—the effect of pressure on the rate of propagation of the reaction zone and upon the rate of molecular transformation.

National Advisory Committee for Aeronautics, Report No. 372, Feb. 28, 1931, Washington, U.S. Government Printing Office, 1930, [1931], pp. 19, ills., diagrs.

Stevens, H. L. Testing aeroplane controls.

Journ. Roy. Aer. Soc, Vol. 35, No. 242 (Feb. 1931), London, pp. 96-120, ills., diagrs.

Stevens, H. L., and A. E. Woodward Nutt. Charts for aircraft performance reduction.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 441-459, diagrs., tabls. Rep. Mem. No. 1316. (Ae. 453.)

Stewart, A. T. Regional aviation conferences.

Journal of Air Law, Vol. 2, No. 1 (Jan. 1931), Chicago, pp. 29-34.

Stewart, C. J. Determination of position in high latitudes, with particular reference to aircraft observation.

Nature, Vol. 128, No. 3223 (Aug. 8, 1931), London, pp. 212-214.

- High altitude flying.

Aircraft Engineering, Vol. 3, No. 26 (April 1931), London, pp. 87-92.

Stewart, Oliver. Cross-country flying.

New York, R. R. Smith, inc., 1931, pp. ix, 116, ills., diagrs.

- Flying as a career; a popular guide for all proposing to obtain a position

in the new industry as a pilot, navigator, or aircraftman.

London, New York, Sir I. Pitman & Sons, 1931, pp. ix, 81, ills.

- Single or twin-engined day bombers?

Aviation, Vol. 30, No. 6 (June 1931), New York, pp. 344-346, ills.

Stieglitz, Albert. Der DVL-Torsiograph, ein Drehschwingungs-Messgerät für Fahrzeugmotoren.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 2. Heft (28. Jan. 1931), München und Berlin, pp. 49-52, ills., diagrs.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin 1931, pp. 358-361, ills., diagrs.

Stieri, Emanuel. See Gernsback, Hugo, and Emanuel Stieri: Aviation mechanics.

Stimson, Thomas E., Jr. Aviation in the high schools.

Western Flying, Vol. 9, No. 1 (Jan. 1931), Los Angeles, Calif., pp. 24-27, ills.

- Aviation in the universities.

Western Flying, Vol. 9, No. 2 (Feb. 1931), Los Angeles, Calif., pp. 24-26, ills.

- One third down. The chief obstacle to financing airplane sales is insurance. This and other problems are discussed in this article.

Western Flying, Vol. 10, No. 3 (Sept. 1931), Los Angeles, Calif., pp. 15-17.

- Pilots—Plane buyers of 1931.

Western Flying, Vol. 9, No. 4 (April 1931), Los Angeles, Calif., pp. 38-41, port.

- Team work in production.

Western Flying, Vol. 9, No. 3 (March 1931), Los Angeles, Calif., pp. 42-46, ills. 69261—35-18

Stimson, Thomas E., Jr. Why the Dycers succeed.

Western Flying, Vol. 9, No. 6 (June 1931), Los Angeles, Calif., pp. 46-47, 91 ill., ports.

Stipa, Luigi. Aerei per voli alle alte quote.

Riv. Aer., Anno 7, N. 12 (die. 1931), Roma, pp. 492-498, ills.

- L'ala a turbina.

Riv. Aer., Anno 7, N. 6 (giugno 1931), Roma, pp. 436-441, ills. L'Aerotecnica, Vol. 11, No. 4 (Aprile 1931), Roma, pp. 411-418, ills. English abstract, pp. 501-502.

- Esperienze con eliche intubate.

L'Aerotecnica, Vol. 11, No. 8 (agosto 1931), Roma, pp. 923-953, ill., diagrs. English abstract, p. 1064.

Stith, Richard Lewis. See Kirsten, Frederick Kurt, Harold Lamont Adams and Richard Lewis Stith: Venturi wind tunnel number 1—

Stockholm. Der dritte internationale Kongress für technische Mechanik Stockholm 1930.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 2. Heft (28. Jan. 1931), München und Berlin, pp. 44-46.

- Den första internationella säkerhetskongressen.

Flygning, Arg. 9, N: R 1 (Jan. 1931), Stockholm, p. 1.

- Hur I L I S kommer tili.

Flygning, Arg. 9, N: R 4 o. 5 (April-Maj 1931), Stockholm, p. 74-75, ill.

- I L I S och dess utställare.

Flygning, Arg. 9, N: R 4 o. 5 (April-Maj 1931), Stockholm, pp. 72-73, diagr.

- I.L.I.S. The Stockholm International Aero Show, May 15-31, 1931.

Flight, No. 1168,1169, 1170, Vol. 23, No. 20, 21, 22 (May 15, 22, 29,1931), London, pp. 421, 447450, 472-475, ills.

- I L I S utställningen.

Flygning, Arg. 9, N: R 6 (Juni 1931), Stockholm, pp. 110-113,126, ills.

- Internationella luftfartsutställningen.

Flygning, Arg. 9, N: R 3 (Mars 1931), Stockholm, pp. 52, 55, ills.

- De nordiska flygtävingarna i Stockholm.

Flygning, Arg. 9, N: R 2 (Febr. 1931), Stockholm, p. 25.

- Stockholms flygklubb.

Flygning, Arg. 9, N: R 11 (Nov. 1931), Stockholm, pp. 216-217, ills.

- Tidigare luftfartsutställningar och Tävlingar. En liten historik.

Flygning, Arg. 9, N: R 4 o. 5 (April-Maj 1931), Stockholm, pp. 84-85, ills.

- See Ekwall, G.: Stockholms blivande lantflyplats i bromma.

Stocks, Käte und Rudolf Stocks. See Holzapfel, Karl Maria, Käte und Rudolf Stocks: Frauen fliegen; sechzehn deutsche pilotinnen in ihren leistungen und abendteuern . . . mit einem geleitwort von Herman Köhl.

Stokes, P. H. Performance of a compression ignition unit with reduced intake and exhaust pressures.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 1123-1144, ills., diagrs., tabls. Rep. Mem. No. 1328 (E. 38).

Stoklitzkt, von. Segelflug-Wettbewerb 1929 in der UdSSR.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 11. Heft (15. Juni 1931), München und Berlin, pp. 335-336, Ills., tabls.

Stout. The Stout "Sky Car."

Flight, No. 1164, Vol. 23, No. 16 (April 17, 1931), London, p. 334, ills.

Stout, M. B. See Sherlock, R. H., and M. B. Stout: An anemometer for a study of wind gusts.

Strains and stresses. See Teichmann, Alfred: Zur berechnung auf knickbiegung beanspruchter flugzeug holme.

Stratosphere. See Bally, J.: Piccard & Kipfer. Comment ils ont pu réaliser en cabine étanche leur ascension dans la stratosphère.

- See Farman: The Farman "Stratospheric" aeroplane.

- See H., H.: Professor Piccard over zijn hoogtevaart. Gevangenen der

stratosfeer.

- See Junkers: Flight in the stratosphere.

- See Junkers: Das Stratosphärenflugzeug von Junkers.

- See Piccard, Auguste: L'ascension du professeur Piccard.

- See Piccard, Auguste: Der Höhenballon von Professor Piccard.

- See Piccard, Auguste: Le livre de bord du professeur Piccard.

- See Piccard, Auguste: Met professor naar de stratosfeer.

- See Piccard, Auguste, y Paul Kipfer: Tentativas del professor Picaard y

otros esfuerzos para el conocimiento de la estratosfera.

- See Raffaelli, Italo: Apparati motori a vapore per la navigazione stratosferica.

Stratton, J. A., and H. G. Houghton. A theoretical investigation of the transmission of light through fog.

Physical Review, Vol. 38, No. 1 (July 1,1931), Minneapolis, pp. 159-165.

Stratton, Samuel W. Dr. Samuel W. Stratton.

U.S. Air Services, Vol. 16, No. 11 (Nov. 1931), Washington, D.C., p. 41.

Streamflow. See Kunz, Jakob: Some examples of dimensional analysis.

- See Mueller, H., und H. Peters: Geschwindigkeit^- und Mengenmessungen von Flüssigkeiten.

Streamline. See Ower, E., and C. T. Hutton: The drag of small streamline bodies.

- See Prandtl, L.: Einführung in die Grundbegriffe der Strömungslehre.

- See Tietjens, O.: Beobachtung von Strömungsformen.

- See Tollmien, W.: Turbulente Strömungen.

Streamline nacelle. See Ower, E., and C. T. Hutton: Interference of a streamline nacelle on a monoplane wing.

Strength tests. See Rhode, Richard V., and Eugene E. Lundquist: Strength tests on paper cylinders in compression, bending, and shear.

Stresses. See Evans, F. G.: The method of "least work" and the stressing of aeroplane structures.

- See Sezawa, Katsutada, and Genrokuro Nishimura: Stresses under

tension in a plate with a heterogeneous insertion.

Strijkers, A. Radioproeven op de Holland—Indie route.

Het Vliegveld, 15de Jaarg., No. 3 (Maart 1931), Amsterdam, pp. 76-79, ills., map.

Stringpellow, John. See Davy, M. J. B.: Henson and Stringfellow, their work in aeronautics; the history of a stage in the development of mechanical flight, 1840-1868.

Stroborama. See Jacuhsky, Juljan: Stroborama.

Structures. See Van den Broek, John Abraham: Elastic energy theory.

Strut systems. See Teichmann, Alfred: Spatial buckling of various types of airplane strut systems.

Struts. See Hartshorn. A. S.: Wind tunnel tests of seven struts.

- See Oleo strut: Dynamic test of long stroke oleo strut with compensating

valve.

- See Parkinson, H.: Strut fairing.

- See Spars.

- See Ward, Kenneth E.: Interference effects and drag of struts on a monoplane wing.

Stryk, Heinrich von. Rigging lines for parachutes. A suggested alternative to silk or hemp.

Aircraft Engineering, Vol. 3, No. 33 (Nov. 1931), London, p. 280, ill.

Stubblepield, Blaine. Man behind the wings.

U.S. Air Services, Vol. 16, No. 1 (Jan. 1931), Washington, pp. 27-29.

Studley, Barrett. Learning to fly for the Navy.

New York, The Macmillan Company, 1931, pp. x, 257, ills.

Stückle, Robert. Uhlands Ingenieur-Kalender 1932.Ü Leipzig, Verlag Alfred Kroner, 1931, pp. 1040, ills.

Sturm, Fritz, und M. Schirmer. Triebwerk anläge mit Vorgelege im Luftschiff "Graf Zeppelin."

Zeitschr. Ver. deutscher Ing., Bd. 75, Nr. 38 (19. Sept. 1931), Berlin, pp. 1189-1192, ills., diagrs

Submarine carrier. See Carriers: A submarine aircraft carrier.

Sudeck, G. See Eisner, Franz, G. Sudeck, Rudi Schröer and O. Zinke: Vergrösserung der effektiven Höhe von Flugzeugschleppantennen.

Sufprin-Hebert, and J. Jarry. La construction des avions. Paris, 1931, pp. 500, ills.

Sullivan, James E. Corrosion of duralumin rivets.

Aviation, Vol. 30, No. 6 (June 1931), New York, pp. 347-349, ills.

Superchargers. See L6glise, Pierre: Superchargers.

- See Oestrich, Hermann: Untersuchung eines Flugmotoren-Geblases,

Bauart Argus-Roots.

- See Schey, Oscar William: The comparative performance of superchargers.

- See Schey, Oscar William: Superchargers and supercharging.

- See Nebesar, Robert J.: Supercharging the aeroplane engine and increasing.

speed with altitude.

Supermarine. Advance results of wind tunnel tests on Supermarine wing radiator.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, 1931, pp. 245-248, tabl. R.A.E. Ref. 70 BA 5 R. 55.

- Air Ministry. Directorate of technical development. Specification No. 626.

Supermairne S. 5.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, 1931, pp. 293-311, tabls.

- How the supermarine S. 6B was built.

Aeroplane, Vol. 41, No. 25 (Dec. 16,1931), London, pp. 1376-1379, ills.

- Speed course test of Supermarine S. 5.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, 1931, p. 352. M.A.E.E. Report No. F A 51A.

- Supermarine S. 5 fuselage proof load tests.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, 1931, pp. 333-335. R.A.E. Report No. M.T. 5292.

- The Supermarine S. 6. B. racing seaplane (British). A low-wing twin-float

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National Advisory Committee for Aeronautics, Aircraft Circulars No. 154, Dec. 30, 1931, Washington, December 1931, pp. 6, ills.

- Test of model of Supermarine S. 4 seaplane.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, pp. 200-203, ills., diagrs., tabls. R.A.E. Report No. B. A. 550.

See Cowley, W. L., and R. Warden: Tests of quarter scale models of high speed seaplanes for the Schneider Trophy Contest of 1927. Introduction and Section I. Tests on the Supermarine S. 5. models.

- See Harris, R. G., and L. E. Caygill: Model tests on Supermarine S. 4

seaplane. Effect of lowering wing.

- See Harris, R. G., L. E. Caygill, and R. A. Fairthorne: Wind tunnel tests

on Gloster and Supermarine wing radiators.

Supf, Peter, und Heinz Orlovius. Die Welt der Flieger.

Berlin, Verlag von Reimar Hobbing, 1931, pp. 96, ills.

Surveying. Canal surveying from the air.

Flight, No. 1199, Vol. 23, No. 51 (Dec. 18, 1931), London, pp. 1250-1251, ill.

- See Beadle, J. B.: Air survey for Hoover Dam.

- See Church, Earl Frank: Methods of eliminating ground surveying for

control in aerial photographic mapping.

- See Hotine, Martin: Surveying from air photographs.

Sutter, Karl. Untersuchungen über den Luftwiderstand.

Zeitschr. Ver. deutscher Ing., Bd. 75, Nr. 12 (21. März 1931), Berlin, p. 359.

Sutton, H., and L. F. Le Brocq. The protection of magnesium alloys against corrosion.

Aer. Res. Comm., Rep. Mem., No. 1390 (M 73-A 65, 74, 92), July 1930, London, 1931, pp. 22, tabls.

Sutton, O. G. See Davies, E. LL., and O. G. Sutton: Some problems of modern meteorology, No. 5. The present position of the theory of turbulent motion in the atmosphere.

Swahn, Waldemar. Vara Kungliga och flyget.

Flygning, Arg. 9, N:R 4 o. 5 (April-Maj 1931), Stockholm, pp. 76-78, 95, ills.

Swan, Andrew. Investigation into the increase in permissible engine speed consequent upon a reduction in the weight of the reciprocating and rotating masses.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, 1931, pp. 280-283, 286-288, diagrs. R.A.E. Report No. E. 3035, 3035B.

--Piston and connecting rod weights and other relative data in modern

aircraft engines.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, 1931, ppl 284-285, tabl. R.A.E. Report No. E. 3095A.

«

- The progress of aero engine design at the Paris show.

Aircraft Engineer, Flight Engineering Section, Suppl. to No. 1153, Viol 23, No. 5 (Jan, 30, 1931), London, pp. 96d-96g (4-7), ills.

- Recent developments in engine cooling.

Journ. Roy. Aer. Soc, Vol. 35, No. 243 (March 1931), London, pp. 179-206, ills., diagrs.

—■— Recent progress in compression ignition engines.

Aeroplane, Vol. 41, No. 5 (July 29, 1931), London, pp. 316-320, ills.

- The value of reduced weight of reciprocating and rotating masses on

engine performance with special reference to the permissible cost of lighter materials.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, 1931, pp. 289-292, tabl. R.A.E. Report No. E3035C.

Sweden. Aeroplanavdelning vid Svenska järnvägsverkstäderna i linköping. Flygning, Arg. 9, N:R 4 o. 5 (April-Maj 1931), Stockholm, p. 101.

- "Bulldogs" for Sweden.

Flight, No. 1176, Vol. 23, No. 28 (July 10, 1931), London, p. 661, ills.

-- Flygvapnet och flygkommissionen.

Flygning, Arg. 9, N:R 11 (Nov. 1931), Stockholm, pp. 211, 217.

- De nordiska flygtävlingarna.

Flygning, Arg. 9, N:R 6 (Juni 1931), Stockholm, pp. 118-119, ills.

--Saving lives in Sweden.

Airway Age, Vol. 13, No. 1 (Jul. 4,1931), New York, p. 46, ill.

- Svenska aero aktiebolaget

Flygning, Arg. 9, N:R 4 o. 5 (April-Maj 1931), Stockholm, p. 100.

- Den Svenska flygmotortillverkningen.

Flygning, Arg. 9, N:R 4 o. 5 (April-Maj 1931), Stocklolm pp. 97-99, 103, ills.

Swickard, Andrew E. Metal-truss wing spars.

National Advisory Committee for Aeronautics, Technical Notes No. 383, July 24, 1931, Washington, July 1931, pp. 31, diagrs., tabls.

Switzerland. Flughafengebühren. Reglement des Eidgenössischen Luft-tamtes vom 3. Dezember 1930 über die Flugplatztaxen, gutig ab 1. Januar 1931 für die Schweiz. Zollflugplätze.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 2-3 (17. Jan. 1931), Berlin, pp. 12-13.

- Schweiz. Motorloser Flug. Reglement betreffend die Organisation der

Aufsicht über das motorlose Flugwesen vom 14. Dezember 1930.

Nachrichten für Luftfahrer, 12. Jahrg., Nr. 20 (16. Mai 1931), Berlin, pp. 137-140.

Swoffer, Frank Arthur. Air navigation for the private owner; a course of elementary aerial navigation.

London, New York, Sir I. Pitman & Sons, ltd., 1931, pp. viii, 131, ills., diagrs., maps.

Sykes, Claud W. See Heydemarck, Georg; Double-decker C. 666.

Sylvester, Harold MacTavish. An investigation of pressures and vacua produced on structures by wind.

Troy, N.Y., 1931, pp. 53, ills., diagrs. Rensselaer Polytechnic Institute. Engineering and Science Series, No. 31.

Syóyama, Mituo. A method of laboratory device to record the period of a pendulum motion.

Science Reports of the Tokyo Bunrika Daigaku, Sec. A., Vol. i, Nos. 7-12 (May 23, 1931) Tokyo, pp. 113-147, ill.

Syracuse. See Wagner, Sterling Robacker: The modern airport. A study in landscape engineering of the location, design, construction, and management of airports, together with a suggested design for the municipal airport at Syracuse, N.Y.

Szymanski, Piotr. Écoulement plan du fluide ä travers une palissade de segments rectilignes.

Prace Instytutu Aerodynamicznego w Warszawie, Zeszyt II, Warszawa, 1928, pp. 25-52, ills.

- See Bonder, Juljan, i Piotr Szymanski: Contribution ä la théorie du

biplan.

- See Bonder, Juljan, i Piotr Szymanski: Sur le multiplan en tandem.

T

Tables. See Dreisonstok, Joseph Young: Navigation tables for mariners and aviators.

- See Gingrich, John Edward: Aerial and marine navigation tables.

Tailless. A new tailless aeroplane. A step towards the development of a large passenger-carrying "All-wing" aircraft.

Aircraft Engineering, Vol. 3, No. 33 (Nov. 1931), London, p. 274, ills.

- See Heinze, Edwin P. A.: The new German "Tailless."

- See Westland-Hill: The Westland-Hill pterodactyl Mark IV, aeroplane.

Tail surfaces. See Rhode, Richard V.: The pressure distribution over the wings and tail surfaces of a PW-9 pusuit airplane in flight.

Tail wheel. See Ford: De drie-motorige Ford 5-AT-C.

Take-off. See Gutkowski, Tadeusz: Pomiar wysokoáci samolotów przy starcie.

- See Gutkowski, Tadeusz: Pomiar wysokoáci samolotów przy starcie (opis

aparatów).

- See Gutkowski, Tadeusz: W sprawie pomiarów wysokoáci samolotów przy

starcie.

- See Jaeschke, Rudolf: Ein Beitrag zur Lösung des Problems der Verkürzung von Start und Landung bei Flugzeugen.

- See Launching.

- See Mokrzycki, Gustaw Andrzej: Rozbieg startuj^cych samolotów.

- See Pröll, A.: Start und Landung fahrgestelloser Flugzeuge.

- See Rolinson, D.: Take-off and landing of aircraft.

Tal.aferro, A. Pendleton, Jr. Traffic control—an approaching problem. Airway Age, Vol. 12, No. 5 (May 2,1931), New York, pp. 476-478, ills.

Tanahashi, Keizo. Physical properties of raw silk.

Journal of the Society of Mechanical Engineers Japan. Foreign edition, Vol. 33, No. 4 (Dec. 1930), Tokyo, pp. 173-175, ill., tabl.

Tanaka, Keikiti. Air flow through exhaust valve of conical seat.

Report of the Aeronautical Research Institute, Tokyo Imperial University, No. 67 (Vol. 6,1), (Jan. 1931), Tokyo, pp. 24, ills., diagrs., tabls.

Tandem multiplanes. See Bonder, Juljan, i Piotr Szymanski: Sur le multiplan en tandem.

Tâning, A. Vedel. Ravens flying upside-down.

Nature, Vol. 127, No. 3214 (June 6,1931), London, p. 856.

Tanner, T. Movement of smoke in the boundary layer of an aerofoil without and with slot.

Aer. Res. Comm., Rep. Mem., No. 1352 (Ae 483-T. 2983), July 1930, London, 1931, pp. 2, ills., diagrs.

- The two-dimesional flow of air around an aerofoil of symmetrical section.

Aer. Res. Comm., Rep. Mem., No. 1353, (Ae. 484-T. 2984), July 1930, London, 1931, pp. 11, diagrs, tabls.

Tapsell, H. J., S. L. Archbutt, and J. W. Jenkin. Alloys sub-committee. Aeronautical Research Committee. Mechanical properties of pure magnesium and certain magnesium alloys in the wrought condition (continued). Mechanical properties of an "Electron" alloy.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 2, London, 1931, pp. 1024-1032, ills., diagr., tabls. Rep. Mem. No. 1285. (M. 66.)

Tate, George, Jr. Servicing aircraft instruments.

Aviation, Vol. 30, No. 40 (April 1931), New York, pp. 239-243, ills.

Taub, Josef. Beitrag zur Frage der Belastungsannahmen für den Landungs-stoss von Seeflugzeugen.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 14. Heft (28. Juli 1931), München und Berlin, pp. 433-442, diagrs.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E.V., München und Berlin, 1931,101-110, ill., diagrs.

- Load assumption for the landing impact of seaplanes.

National Advisory Committee for Aeronautics, Technical Memorandums No. 643, Oct. 22, 1931, Washington, October 1931, pp. 29, diagrs.

Tauber, Ernst. Haftung des Luftfahrzeughalters und Reichsversicherungsordnung.

Luftschau, 4. Jahgr., Nr. 19 (10. Okt. 1931), Berlin, p. 83.

Taverne, Gaspard Louis. Aviation naturelle; études sur la mécanique animale en vue d'applications aux machines locomotrices et spécialement à l'aéroplane; préface de M. E. Bourdelle.

Paris, G. Doin& Cie., 1931, pp. x, 89, ills., diagrs.

Taxes. See Tell, William K.: Taxation of aircraft motor fuel.

Taylor, C. Fayette. Power plant progress.

Aviation, Vol. 30, No. 1 (Jan. 1931), New York, pp. 26-28, ills.

- A suggested method for measuring turbulence.

National Advisory Committee for Aeronautics, Technical Notes No. 380, June 22, 1931, Washington, June 1931, pp. 7, diagrs.

Taylor, E. S. Bearing loads on radial-engine crankshafts.

Journ. Soc. Automotive Eng., Vol. 28, No. 4 (April 1931), New York, pp. 481-485, ills.

Taylor, G. I. The flow of air at high speeds past curved surfaces.

Aer. Res. Comm., Rep. Mem., No. 1381 (Ae. 506—T, 2904), Jan. 1930, London, 1930, pp. 14, ills., diagrs., tabls.

--Some cases of flow of compressible fluids.

Aer. Res. Comm., Rep. Mem., No. 1382 (Ae. 507-T. 2918), February 1930, London, 1931, pp. 16, ills., diagrs., tabls.

Taylor, H. W. Mapping Porto Rico from the sky.

Nat. Aer. Mag., Vol. 9, No. 11 (Nov. 1931), Washington, pp. 12, 21, ills.

Taylor, Philip B. The thrust of radial engines. An examination of present practice with suggestions for increasing effective thrust horsepower. Aircraft Engineering, Vol. 3, No. 27 (May 1931), London, pp. 109-113, ills., diagrs.

Technique. See L. P.: Caractéristiques techniques générales.

Teed, P. L. Gas fuels for airships. The manufacture of Blau Gas, with details of some possible alternatives.

Aircraft Engineering, Vol. 3, No. 24 (Feb. 1931), London, pp. 41-42, ill., tabl.

Teed, T. L. Airships in horizontal flight. An examination of the complicated forces that come into play when an airship is pitched.

Aircraft Engineering, Vol. 3, No. 27 (May 1931), London, pp. 107-108, diagrs.

Teichmann, Alfred. Das raumliche Knicken einiger Stabverbindungen des Flugzeugbaues.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 17. Heft (14. Sept. 1931), München und Berlin, pp. 525-526, diagrs., tabl.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 230-232, diagrs.

- Spatial buckling of various types of airplane strut systems.

National Advisory Committee for Aeronautics, Technical Memorandums No. 647, Nov. 19,1931, Washington, November 1931, pp. 8, tabls.

- Zur berechnung auf knickbiegung beanspruchter flugzeug holme.

München, R. Oldenbourg, 1931, pp. 50, diagrs.

Teichmann, Alfred, und Karl Borkmann. Versuche mit langen Bolzen in Holzbauteilen.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 18. Heft (28. Sept. 1931), München und Berlin, pp. 557-558, ill., diagr.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 221-229, ills., diagrs.

Teleidographic. See Guerra, U.: Note sulla trasmissione delle immagini dagli aerei alla terra e viceversa.

Tell, William K. Taxation of aircraft motor fuel.

Journal of Air Law, Vol. 2, No. 3 (July 1931), Chicago, pp. 342-355.

Telloirt, Albert. Les problèmes de l'aviation mis à la portée de tout le monde. Perpignan, Imprimerie Sinthe & Cie., 1931, pp. 28.

Temperature. See Wolle, Georg: Die Kälteanlage der DVL.

Tenani, M. Un nuovo tipo di sestante per aeronautica.

L'Aerotecnica, Vol. 11, n. 6-7 (giug.-lugl. 1931), Roma, pp. 760-766, ills. English abstract p. 895.

Tender. An all-metal tender for seaplanes.

Flight, No. 1165, Vol. 23, No. 17 (April 24, 1931), London, p. 362, ills.

Tensionmeter. See Janik, Franciszek: Opis przyrz^dow rylcowych.

- See Wolski, Kazimierz: Stosowanie tensometröw do prob statycznych

platowcöw.

Ter-N Edden, Wilhelm. Das internationale luftverkehrsrecht . . . Anakenbrück i. Hann, 1931, pp. x, 70.

Terry, A. See Muir, N. S., and A. Terry: A harmonic analysis of the torque curves of a single cylinder electric ignition engine when throttled to various mean indicated pressures, with an appendix on the estimation of forcing torques in multicylinder engines.

Terzi, Francesco Lana. See Badia Polesine, Jotti da: L'opera aeronautica del padre conte Francesco Lana Terzi, Breaciano.

Testing. See Gerard, I. J.: The primary importance of mechanical testing in aircraft construction.

- See Hanson, Earl: Testing engines for A.T.C.

- See Hertel Heinrich: Dynamische Bruchversuche mit Fiiegzeugbauteilen.

- See Hüber, Walter: Anweisung für die Prüfung der Eigenschaften von

Flugzeugen.

- See Skerry, E.: Notes on the proof stress. A practical article on the

meaning and use of the new method of testing materials.

- See Tett, H. C.: Fuels and modern methods of testing.

Tett, H. C. Fuels and modern methods of testing.

Journ. Roy. Aer. Soe., Vol. 35, No. 247 (July 1931), London, pp. 633-641, ills.

Tewes, Karl. See Horn, Hans A., und Karl Tewes: Die Schweissung von Elektronmetall im Flugzeugbau.

Thaden, Louise McPhetridge. Training women pilots.

Western Flying, Vol. 9, No. 2 (Feb. 1931), Los Angeles, Oal., pp. 22-23, 91, ills.

Thalau, Karl. Aufgaben der Luftfahrzeug-Statik.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 8. Heft (28. April 1931), München und Berlin, pp. 229-241, ills., tabls., diagrs.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 67-79, ills., diagrs.

- Zur Frage der Belastungsannahmen für Flugzeuge.

Jahrbuch 1931 der Deutschen Versuchsanstalt für Luftfahrt, E. V., München und Berlin, 1931, pp. 80-82, tabl.

Theodolite. See Heyde, Gustav: Recording baloon theodolite.

Theodorsen, Theodore, and William C. Clay. Ice prevention on aircraft by means of engine exhaust heat and a technical study of heat transmission from a Clark Y airfoil.

National Advisory Committee for Aeronautics, Report No. 403, Feb. 13, 1932, Washington, U.S. Government Printing Office, 1931, pp. 24, ills., diagrs.

Theodorsen, Theodore. Investigation of the diaphragm-type pressure cell.

National Advisory Committee for Aeronautics, Report No. 388, July 9, 1931, Washington, U.S. Government Printing Office, 1931, pp. 18, ills., diagrs., tabls.

- A new principle of sound frequency analysis.

National Advisory Committee for Aeronautics, Report No. 395, Oct. 7, 1931, Washington, U.S. Government Printing Office, 1931, pp. 15, ills., diagrs.

Theodorsen, Theodore. On the theory of wing sections with particular reference to the lift distribution.

National Advisory Committee for Aeronautics, Report No. 383, Aug. 22, 1931, Washington, U.S. Government Printing Office, 1931, pp. 16, ills., diagrs., tabls.

Theodorsen, Theodore, and William C. Clay. The prevention of ice formation on gasoline tank vents.

National Advisory Committee for Aeronautics, Technical Notes No. 394, Oct. 6,1932, Washington, October 1931, pp. 7, ills, diagrs., tabls.

Theodorsen, Theodore. The theoretical pressure distribution on wing sections. Physical Review Vol. 37, No. 12 (June 15, 1931), Minneapolis, p. 1701. Abstract).

Theuermeister, Robert. Vom Luftballon zum Zeppelin. Ein Stück Menschenarbeit den Kindern erzählt.

Leipzig, Verlag Ernst Wunderlich, 1931, pp. 204 ills.

Thoelz, W., und W. Haeder. Flugmotoren in Leicht- und Schwerölbauart. Berlin, Verlag Richard Carl Schmidt & Co., 1931, pp. 350, ills.

Thom, A. Eddies behind a circular cylinder.

Aer. Res. Comm., Rep. Mem., No. 1373 (Ae. 500-T. 3037), December 1930, London, 1931, pp. 8, ills., diagrs., tabl.

- Experiments on the flow past a rotating cylinder.

Aer. Res. Comm., Rep. Mem., No. 1410 (Ae. 531-T. 3095), March 1931, London, 1931, pp. 13, ills., diagrs., tabls.

- The pressure on the front generator of a cylinder.

Aer. Res. Comm., Rep. Mem., No. 1389 (Ae. 511-T. 3048), December 1930, London, 1931, pp. 14, ills., diagrs., tabls.

Thompson, A. See Stanhope, T., and A. Thompson: Who's who in British aviation, 1931.

Thompson, Floyd La Verne, and H. W. Kirschbaum. The drag characteristics of several airships determined by deceleration tests.

National Advisory Committee for Aeronautics, Report No. 397, Oct. 12, 1931, Washington, U.S. Government Printing Office, 1931, pp. 15, diagrs., tabls.

. Thompson, Floyd La Verne, and P. H. Keister. Lift and drag characteristics of a cabin monoplane determined in flight.

National Advisory Committee for Aeronautics, Technical Notes No. 362, Jan. 27, 1931, Washington, January 1931, pp. 11, ills., diagrs., tabls.

Thompson, James G. Engine service and maintenance. Part IV—The Kinner K-5.

Western Flying, Vol. 9, No. 1 (Jan. 1931), Los Angeles, Cal., pp. 44-46, ills.

- Engine service and maintenance. Part V—Wright Whirlwinds J-6.

Western Flying, Vol. 9, No. 2 (Feb. 1931), Los Angeles, Cal., pp. 46-48, 91, ills.

- Engine service and maintenance. Part VI—Pratt & Whitney radial

engines.

Western Flying, Vol. 9, No. 3 (March 1931), Los Angeles, Cal., pp. 40-41, 95, ills.

- Engine service and maintenance. Part VII—Warner Scarab and Scarab

junior.

Western Flying, Vol. 9, No. 4 (April 1931), Los Angeles, Cal., pp. 44-46, ills.

- Engine service and maintenance. Part VIII—Cirrus engines.

Western Flying, Vol. 9, No. 5 (May 1931), Los Angeles, Cal., pp. 46-49, 91, ills.

- Engine service and maintenauce. Part IX—Wright and DH Gipsy.

Western Flying. Vo. 9, No. 6 (June 1931), Los Angeles, Cal., pp. 50-52, ills.

Thompson, James G. Engine service and maintenance. Part X—Le Blond engines.

Western Flying, Vol. 10, No. 1 (July 1931), Los Angeles, Cal., pp. 40-42, 75, ills.

- Engine service and maintenance. Part XI-A—Trouble shooting.

Western Flying, Vol. 10, No. 3 (Sept. 1931), Los Angeles, Gal., pp. 28-29, 62.

- Engine service and maintenance. Part XI-B—Trouble shooting.

Western Flying, Vol. 10, No. 4 (Oct. 1931), Los Angeles, Cal., pp. 32-34, ills.

- Engine service and maintenance. Part XI-C—Trouble shooting.

Western Flying, Vol. 10, No. 5 (Nov. 1931), Los Angeles, Cal., pp. 34-36, ills.

- Engine service and maintenance. Part XI-D—Trouble shooting.

Western Flying, Vol. 10, No. 6 (Dec. 1931), Los Angeles, Cal., pp. 36-38, ill.

- Servicing light planes.

National Glider and Airplane News, Vol. 3, No. 2 (Sept. 1931), New York, p. 23, ill.

Thompson, Theodore E. See Bedell, Frederick: The airplane, a practical discussion of the principles of airplane flight. Rewritten and enlarged with the assistance of Theodore E. Thompson.

Thompson trophy. See Granville, Z. D.: Gee Bee super-sportster. Winner of the Thompson trophy at 236.24 M.P.H.

Thornhill, Gertrude. Italy to Brazil 6450-mile formation flight. Aero Digest, Vol. 18, No. 2 (Feb. 1931), New York, pp. 44-45, ills.

Thorpe, Leslie Aaron. Simplified definitions and nomenclature for aeronautics.

San Francisco, Calif., Aviation Press, 1931, pp. 128.

Thrust. See National Physical Laboratory: The National Physical Laboratory. Racing seaplanes and new aircraft. Airscrews. Thrust integrating tubes.

Tichenor, Frank A. Air—hot and otherwise.

Aero Digest, Vol. 19, No. 1, 4 (July, Oct. 1931), New York, pp. 38, 130, 35. National Air Races, Cleveland.

- Air—hot and otherwise. Flying ahead. Rendering useful service.

Period of adjustment.

Aero Digest, Vol. 19, No. 5 (Nov. 1931), New York, pp. 34, 96.

- Air—hot and otherwise. The N.A.C.A. counters.

Aero Digest, Vol. 18, No. 2 (Feb. 1931), New York, pp. 50, 122-130.

- Air—hot and otherwise. Organize in Washington.

Aero Digest, Vol. 19, No. 2 (Aug. 1931), New York, pp. 38,104.

- Air—hot and otherwise. What was wrong with problem XII?

Aero Digest, Vol. 18, No. 4 (April 1931), New York, pp. 44, 238.

Tickets. See Gore, Warren J.: Use of air travel tickets.

Tietjens, O. Beobachtung von Strömungsformen.

Wien, W., und F. Harms: Handbuch der Experimentalphysik, Bd. 4,1. Teil. Hydro-und_ aerodynamik, Leipzig, Akademische Verlagsgesellschaft m.b.H., 1931, pp. 669-703, ills., diagrs.

Hydro- und Aeromechanik nach Vorlesungen von I. Prandtl. Band 2: Bewegung reibender Flüssigkeiten und technische Anwendungen. Berlin, Julius Springer, 1931, pp. viii, 299+28, ills.

Tuen, van Amsterdam-Bandoeng met de "Adelaar".

Het Vliegveld, 15 de Jaarg., No. 2 (Feb. 1931), Amsterdam, pp. 38-42, ills.

Tuen, J. E. van Amateurvlieger en navigator op de route naar Indie.

Het Vliegveld, 15 de Jaarg., No. 9 (Sept. 1931), Amsterdam, pp. 329-331, ills.

Tilgenkamp, E. See Dornier, Claudius, und E. Tilgenkamp: Do.X—das grösste Flugschiff der Welt.

Timing. See Hardy, J. K., and K. V. Wright: The automatic timing of aircraft over a speed course.

Tinaglia, Guglielmo. Aerodinamica.

Bergamo, anonima Bolis, [1931], pp. 56.

--Costruzione degli aerei.

Bergamo, anonima Bolis, [1931], pp. 37.

- Istruzioni di volo. Norme per la circolazione aerea.

Bergamo, anonima Bolis, [1931], pp. 25.

- Navigazione aerea ad uso dei piloti e degli ufficiali di rotta de 2a classe.

Bergamo, anonima Bolis, [1931], pp. 77.

TiNSON, Clifford W. Correction of aeroplane performance to standard atmosphere (Density basis).

Aircraft Engineer, Flight Engineering Section, Suppl. to No. 1178, 1183, Vol. 23, No. 30, 35 (July 24, Aug. 28, 1931), London, pp. 726c-726g, (51-55), 862a-862b, (57-58), diagrs.

Tires. See Wolski, Kazimierz: Wytrzymaloéé opon.

Tissandier. Paul. Il est nécessaire de faciliter les voyages internationaux. L'Aérophile, 39e année, No. 4 (15 avril 1931), Paris, p. 97.

Titanium Tetrachloride. See Rosenhain, W., J. D. Grogan, and T. H. Schofield: The influence of Titanium Tetrachloride on cast aluminium alloys.

Titayna, pseud. Mademoiselle against the world. New York, H. Liveright, 1931, pp. viii, 320, ills. Translated by Mrs. Madeleine Elise (Reynier) Boyd.

Tizard, H. T. Compression-ignition engines. A return to fundamentals in a comparison with the petrol engine.

Aircraft Engineering, Vol. 3, No. 30 (Aug. 1931), London, pp. 185-186, 196, ills.

- See Maitland, C. E., and A. E. Woodward Nutt: Flight tests on the variation of the range of an aircraft with speed and height.

Töpfer, Carl. Auftriebsvertelung und Längsstabilität.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 12.22. Heft (29. Juni, 28. Nov. 1931), München und Berlin, pp. 366-368, 662-663, diagrs.

- Lift distribution and longitudinal stability.

National Advisory Committee for Aeronautics, Technical Memorandums No. 641, Oct. 8, 1931, Washington, October 1931, pp. 7, diagrs.

Tokio. See Berlin-Tokio: Berlin-Tokio in 10 Tagen. Aus dem Reisebericht des japanischen Fliegers Yoshihara.

Tokyo Imperial University. See Japan: The Japanese research institute. The recently opened aeronautical laboratory of Tokyo Imperial university.

Tollmien, W. Grenzschichttheorie.

Wein, W., und F. Harms: Handbuch der Experimentalphysik, Bd. 4, 1. Teil. Hydro- und aerodynamik, Leipzig, Akademische Verlagsgesellschaft m.b.H., 1931, pp. 239-287, ill., diagr.

Tollmien, W. The production of turbulence.

National Advisory Committee for Aeronautics, Technical Memorandums No. 609, March 5, 1931, Washington, March 1931, pp. 32, diagrs.

- Turbulente Strömungen.

Wien, W., und F. Harms: Handbuch der Experimentalphysik, Bd. 4,1. Teil. Hydro- und aerodynamik, Leipzig, Akademische Verlagsgesellschaft m.b.H., 1931, pp. 289-339, ills., diagrs.

Torque. See Knight, Montgomery, and Carl J. Wenzinger: Rolling moments due to rolling and yaw for four wing models in rotation.

- See Lock, C. N. H., and H. Bateman: Airscrews at negative torque.

Torres, M. de. Ensayos del helicóptero Pescara en Barcelona.

Ibérica, Año 18, Núm. 862 (24 enero 1931), Barcelona, pp. 49-54, ills.

ToRSiOGRAPH. See Stieglitz, Albert: Der DVL-Torsiograph, ein drehschwin-gungs-Messgerät für Fahrzeugmotoren.

Torsion. See Atkin, E. EL: Torsion in thin cylinders.

- See Orr. James: Several cases of non-circular torsion solved by analysis

and direct test.

Toulman-Smith, A. K. The range of air line beacons. A determination of the limit of visibility for use in the design of aircraft lights. Aircraft Engineering, Vol. 3, No. 23 (Jan. 1931), London, 12.

Touring. L'activité du Roland-Garros.

L'Aérophile, 39e année, No. 7 (15 uil. 1931), Paris, pp. 207-208, ill.

- See Sibour, Vicomte de: Un voyage.

Tourisme aérien. Tourisme aérien. Troi grandes randonnées: Berlin-Tokio— Le tour de l'Afrique—Paris-Dakar et retour.

Bull. Féd. Aér. Int., 12e année, No. 45 (avril 1931), Paris, pp. 35-39, ills.

Tousignan, S. M., and W. E. Koneczny. Grapho-analytical method of least work.

Airway Age, Vol. 12, No. 10 (Jun. 6, 1931), New York, pp. 572-575, ills., tabls.

Toussaint, A. La aviación actual. Versión española de Mariano Moreno

Caracciolo.

Barcelona, Montauer y Simón, S. A., 1931, pp. 342, ill.

To wing. See Glauert, H.: The stability of a body towed by a light wire.

Towle. Towle all-metal amphibion flying boat.

Aero Digest, Vol. 18, No. 2 (Feb. 1931), New York, pp. 58-59, ills.

Townend, H. C. H. On rendering airflow visible by means of hot wires.

Aer. Res. Comm., Rep. Mem., No. 1349, (Ae. 481—Ae. Techl. 519), October 1930, London, 1931, pp. 5, ills.

- Reduction of drag of radial engines by the attachment of rings of aerofoil

section, including interference experiments of an allied nature, with some further applications.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, Vol. 1, London, 1931, pp. 540-614, ills., diagrs., tabls. Rep. Mem. No. 1267. (Ae. 413.)

- A study of slots, rings & boundary layer control by blowing.

Journ. Roy. Aer. Soc, Vol. 35, No. 248 (Aug. 1931), London, pp. 711-743, diagrs.

- A study of slots, rings and jet control of the boundary layer. a

Aer. Res. Comm., Rep. Mem., No. 1394 (Ae. 515-T. 3078), February 1931, London, 1931, pp. 31, ills., diagrs., tabls.

Track assembly. Track assembly of aircraft. Blackburn's latest time-saving system.

Flight, No. 1152, Vol. 23, No. 4 (Jan. 23, 1931), London, pp. 73-74, ills.

- See Westlands: Track assembly at Westlands.

Traffic. See Rose, Don: The traffic or tomorrow.

Traffic control. See Taliaferro, A. Pendleton, Jr.: Traffic control—an approaching problem.

Traffic rules. See United States Department of Commerce. Aeronautics Branch: Air traffic rules. Extract from air commerce regulations, December 1, 1929.

Training. Air service training.

Aeroplane, Vol. 40, No. 15 (April 15, 1931), London, pp. 646, 648. Flight, No. 1175, Vol. 23, No. 27 (July 3,1931), London, pp. 636-637, ills.

- See Air Service Training limited: Preliminary prospectus of air service

training limited.

- See Asjes, D. L.: Se vliegschool.

- See Bonnalie, Alan F.: The mechanic specializes.

- See Orr, George W.: Flying instruction as it should be.

- See Parrott, R. J.: Air Force training. Some constructional considerations

of the ideal military training aeroplane.

- See Scott, F. P.: Air Force training. Training in peace and war.

- See Stimson, Thomas, E., jr.: Aviation in the high schools.

Transport. Air transport.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1930, vol. 1, London, 1931, p. 61.

- The largest air transport system in the world in point of mileage flown.

U.S. Air Services, Vol. 16, No. 9 (Sept. 1931), Washington, pp. 18, 20.

—— See Breithaupt, J.: Vorteile des Luftschiffs als Verkehrsmittel auf Groesst-entfernungen.

- See Dupuis, Guy D.: Le rail et l'aile (étude économique sur les transports ferroviares et aériens.)

- See Durân, Heriberto: Los trasportes aéreos en los Estados Unidos de

Norteamérica.

-' See Lawrance, Charles L.: Air transport. What it measn to the manufacturer.

- See Niles, Alfred S.: West coast progress in 1930.

- See Pirozzi, Alfonso: L'utilizzazione economica delle linee aeree e la cooperazione del velivolo cogli altri mezzi de trasporto.

- See Schildhauer, C. H.: The DOX—Profitable transportation.

Travel Air. The Travel Air model "R".

Flight, No. 1165, Vol. 23, No. 17 (April 24, 1931), London, pp. 358-361, ills.

Travel air "R." See Mystery ship: The " Mystery ship" revealed. The fastest commercial plane yet flown, it has out-performed the best planes of the Army and Navy.

Thayer, George W., and H. W. March. Elastic instability of members having sections common in aircraft construction.

National Advisory Committee for Aeronautics, Report No. 382, Aug. 12, 1931, Washington, U.S. Government Printing Office, 1931, pp. 42, ills., diagrs., tabls.

Treaties. See Allied and associated powers: Protocol amending articles 34 and 40 of the Convention for the Regulation of Aerial Navigation of October 13, 1919. Paris, December 11, 1929. Irish ratification on April 9, 1930.

- See Austria: Oesterreich. Vertrag zwischen der Republik Oesterreich und

dem Königreich der Niederlande über den Luftverkehr.

- See Canada: Exchange of notes (August 29, and October 22, 1929) recording an agreement between Canada and the United States of America regarding the admission of civil aircraft, the issuance of pilots' licenses and the acceptance of certificates of airworthiness for aircraft imported as merchandise.

- See Great Britain: Agreement between His Majesty in respect of the

United Kingdom and the President of the German Reich amending the agreement of June 29,1927 relating to air navigation. Berlin, July 5,1930. Ratifications exchanged at Berlin, May 6, 1931.

- See Great Britain: Exchange of notes between His Majesty's governments

in the United Kingdom, Canada, the Commonwealth of Australia, New Zealand, and the Union of South Africa and the Government of India, and the Italian government respecting documents of identity for aircraft personnel. London, April 13, 1931.

- See Hahn, Kurt: Die deutschen luftVerkehrsabkommen.

- See United States: Air navigation. Arrangement between the United

States of America and Italy. Effective by exchange of notes signed October 13 and 14, 1931. Effective October 31, 1931.

Tremblot, R. Hydrodynamique experimentale. Sur l'application des interferences à quelques problèmes d'écoulement à grande vitesse. C. R. Acad. Sci., T. 193, No. 10 (7 sept. 1931), Paris, pp. 418-419.

Treusch von Buttlar Brandenpels, A. W. Frh. v. Zeppeline gegen

England.

Zurich [etc] Amaltha verlag, 1031.

Treusch von Buttlar, Brandenfels, Horst. Zeppelins over England. Translated from the German by Huntley Paterson.

London, G. G. Harrap & Co., ltd., 1931, pp. 231, ills.

Trigona della Floresta, Ercole. Considerazioni sul comando degli aeroplani ad ala deformabile in relazione al centramento.

L'Aerotecnica, Voi. 11, n. 10 (ott. 1931), Roma, pp. 1249-1267, diagrs. Abstract in English, p. 1339.

- Problemi strutturali nella construzione degli aeroplani giganti.

L'Aerotecnica, Voi. 11, n. 8 (agosto 1931), Roma, pp. 971-991, ills. Abstract in English p. 1065.

Trissé-Solier. See Cupin," P., et Trissé-Solier: Hydrodynamique. Sur les tourbillons alternés de Benard-Karman et la loi de similitude dynamique de Reynolds.

Trojani, F. Aviazione; lezioni tenute agli allievi piloti di aeroplano 1931. Roma, Stab, tipo-lit. di A. Sampaolesi, 1931, pp. 163, 26, ills., diagrs.

Trumbull, John H. Meeting the challenge for sound cargo and passenger air transport service.

National Aeronautic Magazine, Vol. 9, No. 1 (Jan. 1931), Washington, pp. 31-36, ills.

Trussing. See Cassens, J.: Systematischer Gewichts vergleich an räumlichen Fachwerken.

Tubes. See Handasyde, G. H.: Welded tube construction.

- See Reynolds, Austyn: Seamless steel tubes for aircraft. A description

of the manufacturing processes employed with a discussion on materials and their qualities.

Tulsa. Airport operators go into conference at Tulsa.

Airway Age, Vol. 12, No. 5 (May 2, 1931), New York, pp. 471-472, 496.

Tungsten. See Wright, S. J.: The elasticity of pintsch crystals of tungsten. Tunnels. See Photometric tunnels.

- See Wind tunnels.

Turbines. An internal combustion turbine.

Aeronautical Engineering, suppl., to the Aeroplane, Vol. 40, No. 21 (May 27,1931), London, pp. 980, 982, 984, ills.

- See Prosciutto, A.: Sulla determinazione degli angoli carateristici dei

palettamenti delle macchine a turbine.

- See Spannhake, W.: Kreiselpumpen und Turbinen.

- See Stipa, L.: L'ala a turbina.

Turbulence. See Karman, Th. v.: Mechanical similitude and turbulence.

- See Prandtl, L.: Effect of stabilizing forces of turbulence.

- See Stack, John: Tests in the variable density wind tunnel to investigate

the effects of scale and turbulence on airfoil characteristics.

- See Taylor, C. Fayette: A suggested method for measuring turbulence.

- See Tollmien, W.: The production of turbulence.

Turbulent motion. See Davies, E. LL., and O. G. Sutton: Some problems of modern meteorology, No. 5. The present position of the theory of turbulent motion in the atmosphere.

Turkey. Ueberflug.

Nachrichten fur Luftfahrer, 12. Jahrg., Nr. 2-3 (17. Jan. 1931), Berlin, pp. 14-15, map.

Turn indicator. A new turn indicator.

Aeroplane, Vol. 41, No. 23 (Dec. 2, 1931), London, pp. 1291-1292, ill.

- A new turn indicator. A gyroscopic instrument with an ingenious mounting and fluid-friction drive of general application.

Aircraft Engineering, Vol. 3, No. 28 (June 1931), London, p. 146, ills.

- See Reid-Sigrist: The Reid-Sigrist turn indicator.

Turnbull, W. R. Controllable-pitch propeller.

Journ. Roy. Aer. Soc, Vol. 35, No. 243 (March 1931), London, pp. 231-244, diagrs.

Turner, Charles Cyril. See Hewshaw, P. W.: Air questions and answers.

69261—35-19

Turner, Ellwood J. Resume of experience of Pennsylvania in state regulation. u. S. Air Services, Vol. 16, No. 9 (Sept. 1931), Washington, pp. 29-30.

Tuttle, Alonzo Hubert, and Dale Elmer Bennett. Extent of power of Congress over aviation.

Cincinnati, 1931, pp. 32. Reprinted from Cincinnati Law Review, Vol. 5, No. 3.

Twinning. See Gough, H. J., and H. L. Cox: Mode of deformation of a single crystal of silver.

Tyres. See Dowty, George H.: Aircraft wheels and tyres. A review of current practice with comments on merits and demerits of various types.

U

Underhill, E. A. Pilots under the hood.

Western Flying, Vol. 10, No. 3 (Sept. 1931), Los Angeles, Calif., pp. 18-19, 62, ills.

United States. Air navigation. Arrangement between the United States of America and Italy. Effected by exchange of notes signed October 13 and 14, 1931. Effective October 31, 1931.

Washington, United States Government Printing Office, 1931, pp. 11.

Department of State, Publication No. 248, Executive Agreement Series No. 24.

- The American naval airships.

Aeroplane, Vol. 40, No. 14 (April 8, 1931), London, pp. 600, 602-603, ills.

- Amerikanische Flugzeug- und Motorenmuster des Jahres 1930.

Zeitschr. Ver. deutscher Ing., Bd. 75, Nr. 5 (31. Jan. 1931), Berlin, p. 150.

- Arrangement effected by exchange of notes between the United States

and the Dominion of Canada. Admission of civil aircraft, the issuance of pilots' licenses and the acceptance of certificates of airworthiness for aircraft imported as merchandise. Signed August 29, 1929, and October 22, 1929.

Washington, United States Government Printing Office, 1929, pp. ii, 4. Department of State. Executive agreement series No. 2. Department of State Publication No. 19.

- See Abrams, Monte C: Air express possibilities in the United States.

- See Accidents: Aeroplane accidents in U.S.A.

- See Akron: El dirigible "Akron" de la marina Norte Americana.

- See B., H.: La crise de l'aéronautique marchande aux États-Unis.

- See Colegrove, Kenneth: The international aviation policy of the United

States.

- See Lawrance, Charles L.: Commentaires sur la situation aéronautique

aux États-Unis.

- See Mettam, H. A.: Performance requirements for airworthiness in Great

Britain and the U.S.A.

- See Mounier, P. J. J.: De Amerikaansche vliegbalans over 1930.

United States Army. See Davison, F. Trubee: Glancing back at 1930. The Army air corps.

United States Bureau of Lighthouse Service. Radiobeacons and radio-beacon navigation. By George R. Putnam. July 1, 1931.

Washington, Government Printing Office, 1931, pp. 42, ills., diagrs., tabls.

United States Bureau of Standards. See Control: Control by conventional ailerons. Results of a series of wind-tunnel experiments carried out by the U.S. Bureau of Standards.

- See Radio: A new airplane radio device.

United States Cavalry School, Fort Riley, Kan. Other arms, air corps. Academic division, the Cavalry School, Fort Riley, Kansas, 1931-1932. Ft. Riley, Q.M.C. Plant, 1931, pp. 90, diagrs.

United States Congress. See Tuttle, Alonzo Hubert, and Dale Elmer Bennett: Extent of power of Congress over aviation.

- House. Committee on Foreign Affairs. International Technical Committee of Aerial Legal Experts . . . Report to accompany H. J. Resolution 299.

Washington, U.S. Government Printing Office, 1930, pp. 2. 71st Congress, 2nd Session. House. Report 1345.

- House. Committee on Military Affairs. Additional land for Langley

Field, Va. Report to accompany H.R. 10370.

Washington, U.S. Government Printing Office, 1931, p. 1. 71st Congress, 3rd Session. House. Report 2782.

- House. Committee on Military Affairs. Appropriation for construction

at Randolph Field, San Antonio, Texas. Report to accompany H.R. 14912.

Washington, U.S. Government Printing Office, 1931, pp. 2. 71st Congress, 3d Session. House. Report 2877.

- House. Committee on Military Affairs. Increase flying-field area of

Governors Island, N.Y. . . . Report to accompany H.R. 137.

Washington, U.S. Government Printing Office, 1931, pp. 4. 71st Congress, 3d Session. House. Report 2898.

- House. Committee on Military Affairs. Lease portions of Air Depot,

Little Rock, Ark. . . . Report to accompany H.R. 15493.

Washington, U.S. Government Printing Office, 1931, pp. 3. 71st Congress. 3d. Session. House. Report 2875.

- House. Committee on Military Affairs. To lease Governors Island,

Massachusetts to city of Boston. Hearings before subcommittee No. 1 Committee on Military Affairs House of Representatives, seventy-first Congress. Third session on H.R. 14043. Jan. 21, 1931.

Washington, Government Printing Office, 1931, pp. 18.

- House. Committee on Naval Affairs. To amend the act entitled "An

act to authorize the construction and procurement of aircraft and aircraft equipment in the Navy and Marine Corps, and to adjust and define the status of the operating personnel in connection therewith", approved June 24, 1926, with reference to the number of enlisted pilots in the Navy . . . Report to accompany H.R. 16588.

Washington, U.S. Government Printing Office, 1931, pp. 3. 71st Congress, 3d Session, House Report 2451.

- Joint Commission on Airports. Airports, National Capital. Report of

the Joint Commission on Airports, Congress of the United States, pursuant to Public Resolution No. 106, Seventieth Congress, to establish a Joint Commission on Airports.

Washington, U.S. Government Printing Office, 1930, pp. ii, 4. 71st Congress, 2d Session, Senate Doc. 93.

- Joint Commission on Airports. Recommending acquisition of airports

. . . Report.

Washington, U.S. Government Printing Office, 1930, pp. 4. 71st Congress, 2d Session, House Report 852.

United States Congress. Senate. Committee on Commerce. Merchants' aircraft . . . Feb. 6, 1931.

Washington, Government Printing Office, 1931, pp. 38.

- Senate. Committee on Naval Affairs. Authorizing the Secretary of the

Navy to accept a lighter-than-air base, and to construct necessary improvements thereon . . . Report to accompany H.R. 6810.

Washington, U.S. Government Printing Office, 1931, pp. 3. 71st Congress, 3d Session. Senate. Report 1492.

- Senate. Committee on Post Offices and Post Roads. Establishment of

air mail routes . . . Report to accompany H.R. 11704.

Washington, U.S. Government Printing Office, 1930, pp. 3. 71st Congress, 2d Session. Senate. Report 524.

- Senate. Committee on the District of Columbia. Commercial airport

for District of Columbia . . . Report to accompany S. 3901.

Washington, U.S. Government Printing Office, 1930, pp. 3. 71st Congress, 2d Session. Senate. Report 289.

United States Department of Agriculture. Weather Bureau. Tables for computing horizontal distance of pilot balloons, Aerological Division. Washington, United States Government Printing Office, 1931, pp. 60.

United States Department of Commerce. Aircraft accidents. Letter from the acting secretary of Commerce transmitting, in response to Senate Resolution No. 206, information on aircraft accidents which have occurred between the date of May 20, 1926, and May 16, 1930, of which the Department has a record.

Washington, U.S. Government Printing Office, 1931, pp. iii, 259, tabls. 71st Congress, 3d Session. Senate. Doc. 319.

- Aeronautics Branch. Aeronautics trade directory. Part I. Commodities. Part II. Activities. July 1, 1931.

Washington, United States Government Printing Office, 1931, pp. 57. Aeronautics Bulletin No. 3.

- Aeronautics Branch. Air commerce regulations. Effective as amended

January 1, 1931.

Washington, U.S. Government Printing Office, 1931, pp. ii, 33. Aeronautics Bulletin No. 7.

- Aeronautics Branch. Air commerce regulations. Effective December

31, 1926. Effective as amended September 1, 1929.

Washington, U.S. Government Printing Office, 1929, pp. 30, ill. Aeronautics Bulletin No. 7.

- Aeronautics Branch. Air commerce regulations governing alterations

and repairs to licensed aircraft. Effective January 1, 1931.

Washington, U.S. Government Printing Office, 1931, pp. ii, 16, ills. Aeronautics Bulletin No. 7-H.

- Aeronautics Branch. Air navigation maps. July 1, 1931.

Washington, U.S. Government Printing Office, 1931, pp. ii, 13, maps. Aeronautics Bulletin No. 10.

- Aeronautics Branch: Air traffic rules. Extract from air commerce regulations December 1, 1929.

Washington, U.S. Government Printing Office, 1929, pp. 12, ills. Aeronautics Bulletin No. 15.

- Aeronautics Branch: Aircraft engine testing. July 1, 1930.

Washington, U.S. Government Printing Office, 1930, pp. 27, ills., tabls., diagrs. Aeronautics Bulletin No. 12.

United States Department of Commerce. Aeronautics Branch. Airport design and construction. July 1, 1931.

Washington, U.S. Government Printing Office, 1931, pp. ii, 58, ills., tabls., diagrs. Aeronautics Bulletin No. 2.

- Aeronautics Branch. Airport rating regulations. Effective as amended

January 1, 1929.

Washington, U.S. Government Printing Office, 1929, pp. ii, 23, diagrs. Aeronautics Bulletin No. 16.

- Aeronautics Branch. Airport rating regulations. Effective as amended

September 1, 1930.

Washington, U.S. Government Printing Office, 1930, pp. ii, 27, diagrs. Aeronautics Bulletin No. 16.

- Aeronautics Branch. Airports and landing fields. Revised January 1,

1931.

Washington, United States Government Printing Office, 1931, pp. 16. Aeronautics Bulletin No .5.

- Aeronautics Branch. Airway bulletin.

Washington, U.S. Government Printing Office, 1931, ills., maps, diagrs.

- Aeronautics Branch. Airway map of the United States, August 1, 1931.

Washington, United States Government Printing Office, 1931. Aeronautics Bulletin No. 8.

- Aeronautics Branch. Airway strip map list . . .

Washington, U.S. Government Printing Office, 1929, pp. 7, maps. Aeronautics Bulletin No. 10.

- Aeronautics Branch. Airworthiness requirements of air commerce regulations for aircraft. Effective January 1, 1931.

Washington, U.S. Government Printing Office, 1931, pp. ii, 86, ills., tabls., diagrs. Aeronautics Bulletin No. 7-A.

- Aeronautics Branch. Airwothiness requirements of air commerce regulations for aircraft. Effective as amended January 1, 1932.

Washington, U.S. Government Printing Office, 1931, pp. ii, 99, ills., tabls., diagrs. Aeronautics Bulletin No. 7-A.

- Aeronautics Branch. Civil aeronautics in the United States, July 1,

1931.

Washington, United States Government Printing Office, 1931, pp. 56. Aeronautics Bulletin No. 1.

- Aeronautics Branch. Control of airplanes at low speeds by means of

conventional ailerons. July 1, 1931.

Washington, U.S. Government Printing Office, 1931, pp. ii, 24, ills., tabls., diagrs. Aeronautics Bulletin No. 15.

- Aeronautics Branch. Department of Commerce regulations governing

entry and clearance of aircraft effective as amended April 7, 1931, and United States airport of entry regulations effective November 1, 1931.

Washington, U.S. Government Printing Office, 1931, pp. ii, 5. Aeronautics Bulletin No. 7-c.

- Aeronautics Branch. Descriptions of airports and landing fields in the

United States. September 1, 1931.

Washington, U.S. Government Printing Office, 1931, pp. ii, 169. Airway Bulletin No. 2.

- Aeronautics Branch. Establishment and operation of Department of

Commerce intermediate landing fields. July 1, 1931.

• Washington, United States Government Printing Office, 1931, pp. 8. Aeronautics Bulletin No. 11.

- Aeronautics Branch. General airway information. September 1, 1931.

Washington, U.S. Government Printing Office, 1931, pp. ii, 184, ills., maps, tabls., diagrs, Airway Bulletin No. 1.

United StAtes Department of Commerce. Aeronautics Branch. Gliders and gliding. July 1, 1930.

Washington, U.S. Government Printing Office, 1930, pp. ii, 8. Aeronautics Bulletin No. 22.

- Aeronautics Branch. Inspection service memorandum, No. 1.

Washington, U.S. Government Printing Office, 1931.

- Aeronautics Branch. List of air navigation charts. October 15, 1929.

Washington, U.S. Government Printing Office, 1929, pp. 7, maps. Aeronautics Bulletin No. 10.

- Aeronautics Branch. List of airports and landing fields. Revised

October 15, 1931.

Washington, United States Government Printing Office, 1931, pp. 18.

- Aeronautics Branch. Medical examiners of the aeronautics branch.

June 1, 1931.

Washington, United States Government Printing Office, 1931, pp. 12. Aeronautics Bulletin No. 23.

- Aeronautics Branch. Notes on airport lighting, April 15, 1929r

Washington, 1929, ills.

- Aeronautics Branch. Parachute supplement. Air commerce regulations.

Effective July 1, 1930.

Washington, U.S. Government Printing Office, 1930, pp. 5. Aeronautics Bulletin No. 7D.

--Aeronautics Branch. Reduction of airplane noise. October 1, 1930.

Aeronautics Bulletin No. 25, Washington, U.S. Government Printing Office, 1930, pp. ii, 21, tabls., diagrs.

--Aeronautics Branch. Regulations governing entry and clearance of aircraft, effective as amended April 7, 1931, and United States airport of entry regulations, effective November 1, 1931.

Washington, United States Government Printing Office, 1931, pp. 5. Aeronautics Bulletin No. 7-C.

- Aeronautics Branch. Regulations governing establishment and certification of aeronautical lights and instructions for marking obstructions to air navigation. August 1, 1930.

Washington, U.S. Government Printing Office, 1930, pp. ii, 8. Aeronautics Bulletin No. 9.

- Aeronautics Branch. Relative lift distribution in any biplane. July 1,

1929.

Washington, U.S. Government Printing Office, 1929, pp. 21, tabls. Aeronautics Bulletin No. 14.

- Aeronautics Branch. Report of Committee on Airport Zoning and

Eminent Domain. December 18, 1930.

Washington, U.S. Government Printing Office, 1931, pp. ii, 14.

- Aeronautics Branch. School supplement of Air Commerce Regulations.

Effective as amended January 1, 1931.

Washington, U.S. Government Printing Office, 1931, pp. ii, 6. Aeronautics Bulletin No. 7-B

- Aeronautics Branch. Second report of liasion committee on aeronautical

radio research. October 15, 1931.

Washington, United States Government Printing Office, 1931, pp. 33.

- Aeronautics Branch. State aeronautical legislation and compilation of

state laws. Revised to September 1, 1929.

Washington, U.S. Government Printing Office, 1929, pp. iii, 76. Aeronautics Bulletin No. 18.

- Aeronautics Branch. Trend in airplane design as indicated by approved

type certificates. April 1, 1931.

Washington, U.S. Government Printing Office, 1931, pp. ii, 16. Aeronautics Bulletin No. 21.

United States Department of Commerce. Aeronautics Branch. See National Conference on Uniform Aeronautic Regulatory Laws: Proceedings of the National Conference on Uniform Aeronautic Regulatory Laws, December 16 and 17, 1930, Washington, D.C.

- See Airworthiness: Amended airworthiness requirements. Effective January 1.

- See Young, Clarence M.: Activities of the Aeronautics Branch Department of Commerce.

- Bureau of the Census. Census of manufactures: 1927. Aircraft, motor

vehicles, motor-vehicle bodies and motor-vehicle parts, motor cycles and bicycles.

Washington, U.S. Government Printing Office, 1929, pp. 24, tabls.

United States Department of State. Air navigation. Arrangement between the United States of America and Italy. Effected by exchange of notes signed October 13 and 14, 1931. Effective October 31, 1931.

Washington, United States Government Printing Office, 1931, pp. 11. Department of State. Publication No. 248. Executive Agreement Series No. 24.

- Regulations to govern air navigation in the Canal Zone. Promulgated

by the Secretary of State. September 22, 1931.

Washington, U.S. Government Printing Office, 1931, pp. iii, 36. Publication, No. 249.

United States Department of the Navy. Flight manual. Training seaplanes.

Bureau of Navigation, Aviation Training Pamphlet, N-l, Washington, U.S. Government Printing Office, 1930, pp. iv, 64, ills., map.

Prepared by the instruction staff, United States Naval Air Station, Pensacola, Florida.

- Syllabus for the training of student naval avaitors and student naval

aviation pilots. U.S. Navy and U.S. Naval Reserve, U.S. Marine Corps and U.S. Marine Corps Reserve heavier-than-air craft.

Washington, U.S. Government Printing Office, 1931, pp. ii, 14, tabls.

- Board on Naval Airship Base. Naval airship base. Letter from the

* Secretary of the Navy transmitting report covering selection of locations

deemed most suitable for a naval airship base.

Washington, U. S. Government Printing Office, 1929, pp. iii, 58, tabls. 71st Congress, 2d Session. House Document 132.

- Bureau of Navigation. Revised syllabus for the training of student naval

aviators and student naval aviation pilots. U.S. Navy and U.S. Naval Reserve, U.S. Marine Corps and U.S. Marine Corps Reserve. Heavier-than-air craft.

Washington, U.S. Government Printing Office, 1930, pp. ii, 10, tabls.

- Bureau of Navigation. Syllabus for the training of student naval aviators and student naval aviation pilots. U.S. Navy and U.S. Naval Reserve, U.S. Marine Corps and U.S. Marine Corps Reserve heavier-than-air craft.

Washington, United States Government Printing Office, 1931, pp. ii, 14, tabls.

United States Department of War. Annual report of the Assistant Secretary of War, Hon. F. Trubee Davison.

Annual Report of the Secretary of War 1931, Washington, United States Government Printing Office, 1931, pp. 29-36. Report on the condition of the Air Corps.

- Identification of aircraft. Prepared under direction of the Chief of Air

Corps.

Washington, U.S. Government Printing Office, 1929, pp. 6, 7-62 nuinb., ills. War Depart, ment, Training Manual No. 2170-35

United States Department op War. Report of Air Corps procurement operations, fiscal year 1931. (Sec. 10 (m), 44 Stat.L. 78?).

Annual Report of the Secretary of War 1931, Washington, United States Government Printing Office, pp. 253-259.

United States Hydrographic Office. Position tables for aerial and surface navigation.

Washington, U.S. Government Printing Office, 1931, pp. 223, tabls., diagrs.

United States National Advisory Committee for Aeronautics. See National Advisory Committee for Aeronautics.

United States Naval Air Station, Lakehurst, N.J. Syllabus for the training of student naval aviators, lighter-than-air and student naval aviation observers, lighter-than-air. U.S. Navy and U.S. Naval Reserve, U. S. Marine Corps and U.S. Marine Corps Reserve, lighter-than-air craft. Washington, U.S. Government Printing Office, 1931, pp. ii, 21.

United States Naval Air Station, Pensacola, Florida. Flight manual. Training landplanes.

Washington, U.S. Government Printing Office, 1930, pp. iv, 73, ills., maps.

United States Navy. The U.S. Navy airship "Akron."

Flight, No. 1200, Vol. 23, No. 52 (Dec. 25, 1931), London, p. 1267, ill.

- See Akron: The Navy airship "Akron."

- See Boone, Andrew R.: Engine service in the Navy.

- See Moffett, William A.: Five progressive years in naval aviation.

- See Moffett, William A.: Glancing back at 1930. Naval aviation.

United States Office of Chief of Air Corps. Instructions for handling titanium tetrachloride, smoke-screen material. Prepared under direction of the Chief of Air Corps.

Washington, June 6, 1931, pp. 5, diagrs. War Department Technical Regulations 1170-88.

United States Ordnance Department. Browning aircraft machine gun, caliber .50, Ml921. Prepared under the direction of Chief of Ordnance.

Washington, July 15, 1931, pp. 45, ills., diagrs. War Department, Technical Regulations 1300-50B.

United States Post Office Department. Air mail contracts. Letter from the Postmaster General transmitting, in response to Senate Resolution No. 394, certain information relative to air mail contracts, existing air mail routes in the United States, new routes to be established, and names of officers and attorneys that have been employees of the United States Government within the past five years . . .

Washington, U.S. Government Printing Office, 1931, pp. 123, tabls. 71st Congress, 3rd Session. Senate. Document 315.

Universities. See Stimson, Thomas E., jr.: Aviation in the universities.

V

Vacuum tubes. See Eastman, Fred Scoville: Vacuum-tube control for electric wind-tunnel balances.

Valk, William B., Jr. Patents.

Curtiss-Wright Review, Vol. 2, No. 1 (March 1931), New York, pp. 4, 20.

Van den Broek, John Abraham. Elastic energy theory.

New York, J. Wiley and Sons, inc.; London, Chapman & Hall, ltd., 1931, pp. 260, ills., diagrs.

Vas Dias, S. Met den Prins, twee politie-agenten en een hofjager de lucht in. Het Vliegveld, 15de Jaarg., No. 10 (Oct. 1931), Amsterdam, pp. 359-360.

Van Orman, Ward T. A preliminary meteorological survey for airship bases on the middle Atlantic seaboard.

Monthly Weather Review, Vol. 59, No. 2 (Feb. 1931), Washington, pp. 57-64, maps.

Van Tuen. See P.: De ontvangst van Van Tijen.

Van Zandt, J. Parker. Subsidizing civil aviation in Europe and America. u.S. Air Services, Vol. 16, No. 2 (Feb. 1931), Washington, pp. 15-18.

Vancouver. Vancouver's airport.

Flight, No. 1189, Vol. 23, No. 41 (Oct. 2, 1931), London, pp. 1026-1027, ill.

Vasilesco, Florin. Mécanique des Fluides.—Sur une méthode de M. Ria-bouchinsky ayant pour but de résoudre le problème de Dirichlet en vue du calcul du potentiel des vitesses.

C.R. Acad. Sci., T. 193, No. 23 (7 déc. 1931), Paris, pp. 1162-1164.

Vauthier, Arsène Marie Paul. Le danger aérien et l'avenir du pays; préface de M. le maréchal Lyautey.

Paris, Berger-Levrault, 1930, pp. xi, 385, ills.

Veeder, Van Vechten. The legal relation between aviation and admiralty. Air Law Review, Vol. 2, No. 1 (Jan. 1931), New York, pp. 29-38.

Venice. See Montanari, D.: Contributo allo studio del regime anemologico a Venezia.

Ventilation. See Lockspeiser, B.: Ventilation of 24-ft. wind tunnel.

Verdinelli, Armando. La Compagnia nazionale aeronautica; 1920-1931.

Roma, Compagnia naz. aeronautica (Grafia, s.a.i. ind. grafiche), 1931, pp. 176, ills.

Verdurand, A. Les tendences actuelles de la technique.

Technique Moderne, T. 23, No. 5 (mars 1931), Paris, pp. 151-159, ills.

Verduzio, Rodolfo. Sollecitazioni alla partenza ed all'ammaramento negli idrovolanti.

L'Aerotecnica, Vol. 11, N. 11 (nov. 1931), Roma, pp. 1343-1405, ills., diagrs. Abstract in English, pp. 1488-1489.

Verga, Ettore. Bibliografia vinciana, 1493-1930. Bologna, N. Zanichelli, 1931, 2 vols.

Vertical Flight. See Grose, Parlée Clyde: The problem of vertical flight.

Vest, John P. W. Opportunities for seaplane flying on the Atlantic coast. Nat. Aer. Mag., Vol. 9, No. 10 (Oct. 1931), Washington, pp. 11-21, ills.

Vest, J. R. W. Charting Cuba's coastline from the sky.

Nat. Aer. Mag., Vol. 9, No. 2 (Feb. 1931), Washington, pp. 9-12, ills. Vibration. Vibration in aeroplanes.

Aeroplane, Vol. 41, No. 22 (Nov. 25, 1931), London, pp. 1230-1232.

- Vibrations. A miniature portable universal 3-component vibration meter.

Flight, No. 1194, Vol. 23, No. 46 (Nov. 13, 1931), London, pp. 1132-1133, ills.

- See Flutter.

- See Sezawa, Katsutada: On the lateral vibration of a rectangular plate

clamped at four edges.

Vickers. The London showroom of Messrs. Vickers limited.

Engineering, Vol. 131, No. 3412 (June 5,1931), London, pp. 741-742, ills.

Vickers. The supermarine S.6 B monoplane. Main particulars published for the first time.

Flight, No. 1188, Vol. 23, No. 40 (Oct. 2, 1931), London, pp. 981-982.

- Vickers accessories for aircraft.

Weybridge, Surrey, Vickers (aviation) limited [1931], pp. 188, ills., tabls., diagrs.

- The Vickers " Vildebeest. "

Flight, No. 1193, Vol. 23, No. 45 (Nov. 6, 1931), London, pp. 1097-1098, ills.

- See Schneider trophy: The Schneider Trophy contest.

Viehmann, Heinrich. See Brintzinger, Wilhelm, Paul v. Handel und Heinrich Viehmann: Erschütterungsstörungen bei ortbeweglichen Empfängern.

Vigilant, pseud. German war birds.

London, J. Hamilton, ltd. [1931], pp. 264, ports.

Virgin, Eric. Flygvapnets nye chef.

Flygning, Arg. 9, N:R 12 (Dec. 1931), Stockholm, pp. 235, 246, port.

Virtjlt, A. In de schroefwind.

Amsterdam, A. Blitz, 1931, pp. 266, ills., diagrs.

- Typen van de vlieghei.

Het Vliegveld, 15de Jaarg., No. 3 (Maart 1931), Amsterdam, pp. 84-85.

- "Vöörvrij?" . . . "Contact!" Van de Soesterbergsche vlieghei.

Amsterdam, A. Blitz, 1931, pp. 274, ills.

Viscosity. See Peters, H.: Effect of viscosity in speed measurements with double-throat venturi tubes.

Viscous fluids. See Gay, A.: Recherches sur l'hydrodynamique des liquides visqueux.

- See Girault, Maurice: Méthode géométrique de tracés de profils d'ailes

et de corps fuselés. Essai sur la viscosité en mécanique des fluides.

Visibility. Visibility and collisions.

Aeroplane, Vol. 40, No. 7 (Feb. 18, 1931), London, p. 270.

- See Hungtington, Dwight: Adequate visibility for planes.

- See Kurz, Gerhard: Measurement of visibility from the pilot's cockpit on

different airplane types.

- See Kurz, Gerhard: Messung der Sicht vom Fühersitz verschiedener

Flugzeugmuster.

- See Toulman-Smith, A. K.: The range of air line beacons.

Vision. See Grindley, G. C: Reports of the Committee upon the Physiology of Vision. IX. Psychological factors in peripheral vision.

- See Gutkowski, Tadeusz: Teorja akomodacji barwnej oka, zaobserwo-

wanej przez prof. Polack'a.

Vitt, Leonard. Einar Lundborg.

Flygning, Arg. 9, N:R 2 (Febr. 1931), Stockholm, p. 27, port.

- Ernst Fogman 50 ar.

Flygning, Ârg. 9, N:R 1 (Jan. 1931), Stockholm, p. 3, port.

- Flygarprofiler Erik Rasmussen.

Flygning, Irg. 9, N:R 6 (Juni 1931), Stockholm, p. 109, port.

Vitt, Leonard. Flygarprofiler Kapten Wäinö Bremer.

Flygning, Arg. 9, N:R 7 (Juli 1931), Stockholm, p. 129, port.

■- Flygarprofiler Knut Björkvali.

Flygning, Arg. 9, N:R 9 (Sept. 1931), Stockholm, p. 169, port.

Voitoux. See Charcot, Jean: Rapport du Dr. Jean Charcot sur le travail du Commandant Voitoux "La navigation aérienne transatlantique."

Vom Fliegen. See Deutsche Roten Kreuz Vom Fliegen. Zeitschrift für das Jugendrotkreuz.

Vortices. See Gialanella, L.: Sülle correnti generate da una xoppia di vortici o di sorgenti.

- See Havelock, T. H.: Stability of motion of rectilinear vortices in ring

formation.

- See Jones, Arthur Taber: The stability of a single file of straight vortices.

Voss. Militärflugzeuge von heute.

Die Umschau, 35. Jahrg., Heft 41 (10. Okt. 1931), Frankfurt a.M., pp. 813-814, ill.

Voss, Fred. See Gerrish, Harold C, and Fred Voss: Investigation of the discharge rate of a fuel-injection system.

W

Wackett, L. J. Launching by catapult.

Aircraft Engineer, Flight Engineering Section, Suppl. to No. 1192, Vol. 23, No. 44 (Oct. 30, 1931), London, pp. 1086f-1086h, 78-80, ills.

Waddell, R., and F. Worton. The machining of stainless steel.

Aeronautical Engineering, suppl. to the Aeroplane, Vol. 40, No. 17 (April 29, 1931) London, pp. 784, 786, 788, 790, ill., diagrs.

Waddington, Willaim H. Reducing hangar costs.

Western Flying, Vol. 10, No. 1 (July 1931), Los Angeles, Calif., pp. 70-71.

Wärmesegeln. See Kronfeld, Robert: Wärmesegeln, ein neuer Flugsport.

Waghorn, H. R. D. H. R. D. Waghorn.

Aeroplane, Vol. 40, No. 19 (May 13,1931), London, pp. 868, 870, port.

Wagner, Herbert. Flat sheet metal girder with very thin metal web. Parts I, II, III.

National Advisory Committee for Aeronatuics, Technical Memorandums Nos. 604, 605, 606, Feb. 5,12,19,1931, Washington, February 1931, pp. 38, 38, 39, diagrs.

- Landing of seaplanes.

National Advisory Committee for Aeronautics, Technical Memorandums No. 622, May 28, 1931, Washington, May 1931, pp. 15, diagrs.

- Uber die Landung von Seeflugzeugen.

Zeitschr. Flugt Motorluftsch., 22. Jahrg., 1. Heft (14. Jan. 1931), München und Berlin, pp. 1-8, ills., diagrs., tabl.

Wagner, Lawrence T. Lubrication.

Western Flying, Vol. 9, No. 1 (Jan. 1931), Los Angeles, Calif., pp. 35-36.

Wagner, Sterling Robacker. The modern airport. A study in landscape engineering of the location, design, construction and management of airports, together with a suggested design for the municipal airport at Syracuse, N.Y.

Syracuse, N.Y., 1931, pp. 109, maps., plans, diagrs., tabls.

Wait, William, jr. The value of air races.

Aero Digest, Vol. 18, No. 5 (May 1931), New York, pp. 46-48, 132, ills.

Walden, C. D. See Rothrock, Addison M., and C. D. Waldon: Some characteristics of fuel sprays at low-injection pressures.

Walker, Alton H. My next airplane.

Airway Age, Vol. 13, No. 14 (Oct. 3,1931), New York, pp. 281-283.

Walker, Donald F. Bringing soaring up-to-date.

Airway Age, Vol. 13, No. 1 (Jul. 4,1931), New York, pp. 52, 63.

- A glider year.

Airway Age, Vol. 12, No. 1 (Jan. 1931), New York, pp. 58-61, ills.

Walker, W. S. See Fage, A., V. M. Falkner, and W. S. Walker: Experiments on a series of symmetrical Joukowski sections.

Walsh, H. Vandervoort. Architectural principles applied to airport design. Aero Digest, Vol. 19, No. 2 (Aug. 1931), New York, pp. 35-36,128, ills.

Walsh, Raycropt. Dependability in propellers.

U.S. Air Services, Vol. 16, No. 8 (Aug. 1931), Washington, pp. 36-37.

Walter, Franz. Entwicklung des Motorflugsportes im Deutschen Luftfahrt-Verband e. V.

Luftschau, 4. Jahrg., No. 7 (10. April 1931), Berlin, pp. 49-50, ill.

- Gedanken um den Motor flugsport in Rahmen des DLV.

Luftschau, 4. Jahrg., Nr. 1 (10. Jan. 1931), Berlin, p. 4.

Walter, Freidrich. Hünefeld, "Ein Leben der Tat". Potsdam, Ernte Verlag G.m.b.H., 1930, pp. 200.

Ward, Kenneth E. The effect of small variations in profile of airfoils.

National Advisory Committee for Aeronautics, Technical Notes No. 361, Jan. 20, 1931, Washington, January 1931, pp. 9, diagrs., tabl.

- Interference effects and drag of struts on a monoplane wing.

National Advisory Committee for Aeronautics, Technical Notes No. 365, Feb. 17, 1931, Washington, February 1931, pp. 12, ills., diagrs., tabls.

- The interference effects on an airfoil of flat plate at mid-span position.

National Advisory Committee for Aeronautics, Technical Notes No. 403, Dec. 22, 1931, Washington, December 1931, pp. 16, ills., diagrs., tabls.

Ward, Nairne F. See Younger, John Elliott, and Nairne F. Ward: Airplane construction and repair; a textbook for airplane mechanics, by John E. Younger . . . with chapters on heat treatment and welding, by Nairne F. Ward.

Warden, R. See Cowley, W. L., and R. Warden: Tests of quarter scale models of high speed seaplanes for the Schneider Trophy Contest of 1927. Introduction, and Section I. Tests on the Supermarine S. 5. models.

- See Cowley, W. L., and R. Warden: Tests of quarter scale models of high

speed seaplanes for the Schneider Trophy Contest of 1827. Section II. Tests on the Gloster IV models.

- See Cowley, W. L., and R. Warden: Tests on quarter scale models of high

speed seaplanes for the Schneider Trophy Contest of 1927. Section III. Tests on the Crusader models.

■ See Cowley, W. L., and R. Warden: Tests on quarter scale models of high speed seaplanes for the Schneider Trophy Contest of 1927. Section IV, Comparison with full scale and conclusions.

Waring-Brown, R. Aeroplane braking systems. A comprehensive survey of the problem of fitting wheel brakes and types at present in use.

Aircraft Engineering., Vol. 3, No. 28, 29 (June, July 1931), London, pp. 139-140, 157-161, ills.

- Hydraulic brakes for aircraft. The theoretical and practical qualities of

the type discussed with descriptions of prominent examples.

Aircraft Engineering, Vol. 3, No. 34 (Dec. 1931), London, pp. 301-304, 318, ills.

Warner, Edward Pearson, and S. Paul Johnston. Aviation handbook.

New York and London, McGraw-Hill Book Company, inc., 1931, pp. xi. 715, ills., diagrs.

Warner, Edward Pearson. Pages from an air race notebook. Aviation, Vol. 30, No. 10 (Oct. 1931), New York, pp. 576-578, ills.

- Racing rules and handicap races.

Aviation, Vol. 30, No. 12 (Dec. 1931), New York, pp. 682-685, ill.

- What of the year to come.

Aviation, Vol. 30, No. 1 (Jan. 1931), New York, pp. 10-13.

Warsap, J. H. See Fage, A., and J. H. Warsap: The effects of turbulence and surface roughness on the drag of a circular cylinder.

Washington. See Hayes, Robert: Alaska-Washington.

Washington, District of Columbia. See United States Congress. Joint Commission on Airports. Airports, National Capital. Report of the Joint Commission on airports, Congress of the United States, pursuant to Public Resolution No. 106, Seventieth Congress, to establish a Joint Commission on Airports.

- See United States Congress. Joint Commission on Airports: Recommending acquisition of airports. . . . Report.

- See United States Congress. Senate. Committee on the District of

Columbia: Commercial airport for District of Columbia . . . Report to accompany S. 3901.

Wasmund, E. Flugbeobachtungen über mittel und Osteuropäischen gewässern. Geographische Zeitschrift, Bd. 36, 1930, Leipsic, pp. 528-546, 593-611.

Wasserkuppe. See Patterson, John McClure: At the famous Wasserkuppe.

Wasson, Everett L. Flying in the Yukon.

Western Flying, Vol. 10, No. 3 (Sept. 1931), Los Angeles, Cal., pp. 24-26, ills.

Wate au, André. Le programme du vol sans moteur en France. L'Aérophile, 39e année, No. 6 (15 juin 1931), Paris, p. 161.

Water recovery. See Burgess, C. P.: Water-recovery apparatus for airships.

Watson, Wilbur Jay. Building the world's largest airship factory and dock; a complete description of this gaint structure of the Goodyear-Zeppelin Corporation at Akron, Ohio. [Akron, 1930], pp. 10, ills.

Waves. See Galbrun, Henri: Propagation d'une onde sonore dans l'atmosphère et théorie des zones de silence.

Wayne, Anthony. New type wind tunnel to test airplanes.

National Glider and Airplane News, Vol. 3, No. 2 (Sept. 1931), New York, p. 41, ills.

Wead, Frank. Wings for men.

New York & London, The Century Company, [1931], pp. xiii, 333, ills.

Wead, Frank Wilber. Airplane parts and maintenance.

Scranton, Pa., International Text-Book Company, [1931], pp. iv, 64, 76, ills.

- Types of aircraft and materials.

Scranton, Pa., International Textbook Company [1931], pp. v, 63, 39, 60, ill.

Weather. Keeping tab on the weather.

Western Flying, Vol. 10, No. 3 (Sept. 1931), Los Angeles, Cal., p. 22.

- Notes on the weather of 1930.

Aeroplane, Vol. 40, No. 2 (Jan. 14,1931), London, p. 61.

- See Blake, Dean: Weather reporting for the Air Corps.

- See Grant, Hugh Duncan: Reading the weather map.

- See Gregg, Willis Ray: Some observations of a weather man in Europe.

- See Samuels, L. T.: Airplanes for regular upper-air observations.

Weather vane. Een nieuwe windwijzer voor het nachtluchtverkeer.

Het Vliegveld, 15de Jaarg., No. 4 (April 191), Amsterdam, pp. 126-128, ills. Webb, J. Griswold. National conference on uniform aeronautic regulatory laws. Response on behalf of the states.

Air Law Review, Vol. 2, No. 1 (Jan. 1931), New York, pp. 55-56.

Webb, L. D. The flying fleet heads south.

U.S. Air Services, Vol. 16, No. 2 (Feb. 1931), Washington, pp. 19-24, ill.

- Know your way around.

U.S. Air Services, Vol. 16, No. 9 (Sept. 1931), Washington, pp. 11-14, ills.

- Improving the breed.

U.S. Air Services, Vol. 16, No. 12 (Dec. 1931), Washington, D.C., pp. 13-16.

- Your propeller.

U.S. Air Services, Vol. 16, No. 1 (Jan. 1931), Washington, pp. 17-20, ill.

Weber, K. Blindfliegen.

Die Umschau, 35. Jahrg., Heft 30 (25. Juli 1931), Frankfurt a.M., pp. 598-600, ills.

Weems, Philip Van Horn. Air navigation.

New York and London, McGraw-Hill Book Company, inc., 1931, pp. xiii, 589, ills., diagrs.

- The Gatty ground speed and drift indicator.

The Air Legion Aeronautical News Vol. 1, No. 1 (Dec. 4,1931), Washington, pp. 3-6, ills.

Weick, Fred E. Aircraft propeller design.

New York and London, McGraw-Hill Book Company, inc., 1931, pp. 294.

- The behavior of conventional airplanes in situations thought to lead to

most crashes.

National Advisory Committee for Aeronautics, Technical Notes No. 363, Feb. 3, 1931, Washington, February 1931, pp. 13, ill., diagrs.

Weidinger, Hanns. Liquid cooling of aircraft engines.

National Advisory Committee for Aeronautics, Technical Memorandums No. 649, Dec. 3, 1931, Washington, December 1931, pp. 11, ills., diagrs.

- Versuche mit Heisskühlung am Flugmotor.

Zeitschr. Flugt. Motorluftsch., 22. Jahrg., 18. 22. Heft (28 Sept., 28. Nov. 1931), München und Berlin, pp. 541-546, 664, ills., diagrs.

Weinstein, A. Meccanica.—Sur le mouvement d'un fluide ä travers un barrage permeable.

Atti della Aecademia Nazionale dei Lincei, Anno 328, 1931 (IX), Serie Sesta, Rendiconti, Vol. 14, Fasc. 7-8, Roma, 1931, pp. 276-278.

Weiss, Pierre Theodore. Le poitrail bleu du Sagittaire. Paris, L. Querelle, 1931, pp. 203.

Weiss, Stanisl^w. Pollczenia nitowe duralumin] owe. (Assemblages par rivets en duralumin).

Instytut Badan Technicznych Lotnictwa, Sprawozdanie, Bulletin No. 7, (Nr. 37), War-szawa, 1931, pp. 43-78, ills., diagrs., tabls. Supplement to this article on page 163 of No. 8, 1932.

Welcker, W. A., Jr. See Russell, H. W., and W. A. Welcker, jr.: Endurance and other properties at low temperatures of some alloys for aircraft use.

Welding. See George, H. S.: The cause and prevention of heat cracks in aircraft welding. A study of localized stresses.

- See Guzzoni, G., e E. Nardi: La saldatura dei materiali metallici, le sue

applicazioni nelle costruzioni aeronautiche.

- See Hardecker, John F.: The spot welding of stainless steel.

- See Moyanham, George B.: Methods of testing welds.

- See Younger, John Elliott, and Nairne F. Ward: Airplane construction

and repair; a textbook for airplane mechanics . . . with chapters on heat treatment and welding.

Wells, G. M. Development of anti-aircraft matériel. New types of antiaircraft guns—Improved methods for directing fire of guns and for locating and illuminating hostile aircraft.

Mech. Eng., Vol. 53, No. 6 (June 1931), New York, pp. 427-432, ills.

Wells, John E. The manufacture of precision parts for aircraft engines.

Aviation Engineering, Vol. 5, No. 4 (Nov. 1931), Washington, N.J., pp. 31-33, 48, ills.

Wenneman, Joseph H. Municipal airports; history, development and legal aspect of municipal airports, text of federal acts and regulations, digests of state aviation laws and of state enabling acts, ordinances of principal cities having airports on main airways, legal and business forms in use in the aviation industry.

Cleveland, O., The Flying Review Publishing Company, [1931], pp. xxvii, 879, ills., diagrs., maps.

Wenzinger, Carl Joseph, and Joseph A. Shortal. The aerodynamic characteristics of a slotted Clark Y wing as affected by the auxiliary airfoil position. National Advisory Committee for Aeronautics, Report No. 400, Nov. 21, 1931, Washington, U.S. Government Printing Office, 1931, pp. 16, ills., diagrs., tabls.

Wenzinger, Carl Joseph. Pressure distribution over a thick, tapered and twisted monoplane wing model-N.A.C.A. 81-J.

National Advisory Committee for Aeronautics, Report No. 367, Feb. 24, 1931, Washington, U.S. Government. Printing Office, 1930 11931], pp. 16, ills., diagrs., tabls.

Wenzinger, Carl Joseph, and Thomas A. Harris. The vertical wind tunnel of-the National Advisory Committee for Aeronautics.

National Advisory Committee for Aeronautics, Report No. 387, July 15, 1931, Washington, U.S. Government Printing Office, 1931, pp. 10, ills., diagrs.

Wenzinger, Carl Joseph. See Knight, Montgomery, and Carl J. Wenzinger: Rolling moments due to rolling and yaw for four wTing models in rotation.

Wermeskerten, Henri van. De oceaanvlucht. Modern spel van lucht en oceanen in vier bedrijven.

Amsterdam, L. J. Veen, 1931, pp. 124.

Wertenson, F. Development of the high-speed all-wing monoplane.

Aircraft Engineer, Flight Engineering Section, Suppl. to No. 1187, Vol. 23, No. 39 (Sept. 25, 1931), London, pp. 970a-970d, 65-68), ills., tabls.

- Development of the high-speed Burnelli type monoplane.

Aero Digest, Vol. 19, No. 3 (Sept. 1931), New York, pp. 48-50, 120, diagrs., tabls.

- Investigation and development of the Burnelli type airplane.

Aero Digest, Vol. 18, No. 3 (March 1931), New York, pp. 52-53, 153, diagrs., tabl.

- Investigation of the Burnelli type airplane.

Aero Digest, Vol. 18, No. 1 (Jan. 1931), New York, pp. 57, 128, diagrs.

Westland. Westland rudder bias gear. A device which relieves pilot of fatigue of counteracting turning moment.

Flight, No. 1197, Vol. 23, No. 49 (Dec. 4, 1931), London, p. 1188, ills.

Westland Aircraft Company. The Pterodactyl aeroplane.

Engineering, Vol. 132, No. 3420 (July 31, 1931), London, p. 152, ill.

Westland-Hill. The Westland-Hill pterodactyl Mark IV, aeroplane.

Engineer, Vol. 151, No. 3937 (June 26, 1931), London, p. 706, ill.

- See Kjellson, Henry: Westland-Hill's "Pterodactyl" IB.

Westland Rudder Bias Gear. See Control: A relief gear for the pilot. A device for reducing the load on the controls by permanently off-setting the rudder.

Westlands. Track assembly at Westlands.

Flight, No. 1155, Vol. 23, No. 7 (Feb. 13, 1931), London, pp. 148-149, ills.

Weyl, A. R. See Töpfer, Carl: Auftriebsverteilung und Längsstabilität.

Wheatley, John B. Torsion in box wings.

National Advisory Committee for Aeronautics, Technical Notes No. 366, Feb. 24, 1931, Washington, February 1931, pp. 44, diagrs.

Wheels. Internally-sprung wheels.

Flight, No. 1194, Vol. 23, No. 46 (Nov. 13, 1931), London, p. 1131, ills.

- Les roues "ballons".

L'Aérophile, 39e année, No. 3 (15 mars. 1931), Paris, p. 83, ills.

- See Dowty, George H.: Aircraft wheels and tyres. A review of current

practice with comments on merits and demerits of various types.

- See Pippard, A. J. Sutton, and W. e. Francis: The stresses in a radially

spoked wire wheel under loads applied to the rim.

- See Pippard, A. J. Sutton, and W. e. Francis: Stresses in wired wheels.

Whirling arm. See Bryant, L. W., and A. S. Halliday: Measurement of lateral derivatives of the whirling arm.

Whitaker, Jack. Demonstration flights of the new NB trainer. Aero Digest, Vol. 19, No. 2 (Aug. 1931), New York, p. 66, ills.

White, Bert. 27,000, feet down.—By chute.

Western Flying, Vol. 10, No. 5 (Nov. 1931), Los Angeles, Cal., p. 30.

White, George R. Zoom!

New York, Toronto, Longmans, Green and Co., 1931, pp. ix, 182, ills.

White, H. S. See Bridgeman, O. C, C. A. Ross and H. S. White: Airplane fuel-line temperature.

White, Mat. See White, Percival, and Mat White: Gliding and soaring; an introduction to motorless flight.

White, Percival, and Mat White. Gliding and soaring, an introduction to motorless flight.

New York, Whittlesey House, McGraw-Hill Book Company, inc., 1931, pp. xiv, 234, ills., ports., diagrs.

Whitlock, T. G. Elementary applied aerodynamics.

Oxford, The Clarendon Press, 1931, pp. viii, 240, ills., diagrs.

Whitney, E. G. See Spanogle, J. A., and E. G. Whitney: The effectiveness of a double-stem injection valve in controlling combustion in a compression-ignition engine.

Whittle, F. O. F. The turbo-compressor and the supercharging of aero engines. Journ. Roy. Aer. Soc, Vol. 35, No. 251 (Nov. 1931), London, pp. 1047-1074, diagrs.

Whittle, J. Re jet propulsion.

Journ. Roy. Aer. Soc, Vol. 35, No. 243 (March 1931), London, pp. 261-263, ills.

Whytlaw-Gray, R., and H. S. Patterson. Smoke. A study of aerial disperse systems.

London, Edward Arnold & Co., pp. viii, 192, ills., diagrs. Provides a comprehensive survey of present knowledge of the properties and behavior of smokes.

Wibatjlt. The Wibault 280 T. 10 commercial airplane (French). An all-metal, cantilever, low-wing monoplane.

National Advisory Committee for Aeronautics, Aircraft Circulars No. 140, March 24, 1931, Washington, March 1931, pp. 5, ills.

Wibault-Penhoet. Wibault-Penhoet 281 T. 12. 3 Gnome-Rhone "Titan Majors."

Flight, No. 1177, Vol. 23, No. 29 (July 17,1931), London, p. 699, ill.

Wichita. See Pryor, Edwin W.: Wichita's municipal airport.

Wien, Wilhelm Carl Werner Otto Fritz Franz, und F. Harms. Handbuch der Experimentalphysik, Band 1, 1926; Band 2, Leipzig, 1926; unter mitarbeit von H. Lenz, Band 3, 1929, Band 4, 1. Teil, 1931; Band 4, 3. Teil, 1930. Band 1, Mess-Methoden und Mess-Technik von Ludwig Holborn, Technik des Experiments von Ernest von Angerer. Band 2, Mechanik des Messenpunkte und der starren Körper von Arthur Haas. Band 3, Mechanik, 2. Teil, Technische Mechanik von Ludwig Foppl.

- Handbuch der experimentalphysik. Band I. Mess-Methoden und Mess-Technik von Ludwig Holborn. Technik des experiments von Ernst von Angerer.

Leipzig, Akademische Verlagsgesellschaft m.b.h., 1926, pp. xx, 332; 333-484, ills.

- Band 2. Mechanik der Massenpunkte and der starren Körper von

Arthur Haas.

Leipzig, Akademische Verlagsgesellschaft m.b.h., 1926, pp. xiv, 355, ills.

Wien, Wilhelm Carl Werner Otto Fritz Franz, und F. Harms, unter mitarbeit von H. Lenz. Handbuch der experimentalphysik. Band 3. Mechanik. 2. Teil. Technische Mechanik von Ludwig Föppl.

Leipzig, Akademische Verlagsgesellschaft m.b.h., 1929, pp. x, 189, ills.

- Handbuch der Experimentalphysik, Bd. 4, 1. Teil. Hydro- und aerodynamik. 1. Teil. Strömungslehre und allgemeine Versuchstechnik. Herausgegeben von Ludwig Schiller, Bearbeitet von J. Ackeret, A. Betz, J. M. Burgers, A. Busemann, H. Falkenhagen, H. Mueller, H. Peters, L. Prandtl, H. Schmiedel, O. Tietjens, W. Tollmien.

Leipzig, Akademische Verlagsgesellschaft m.b.H., 1931, pp. xii, 730, ills. 69261—35-20

Wien, Wilhelm Carl Werner Otto Fritz Franz, und F. Harms, unter mitarbeit von H. Lenz. Handbuch der Experimentalphysik, Bd. 4, 3. Teil. Hydro- und aerodynamik. 3. Teil. Technische anwendungen. Herausgegeben von Ludwig Schiller. Bearbeitet von O. v. Eberhard, R. Emden, O. Flachsbart, W. Gaede, L. Hope, F. Horn, W. Klemperer, W. Spannhake. Leipzig, Akademische Verlagsgesellschaft m.b.H., 1930, pp. x, 557, ills., diagrs.

Wigley, W. C. S. Strength of wooden seaplane hulls (Fill sized machines— Third series).

Aer. Res. Comm., Rep. Mem., No. 1376 (Ae. 501-T. 1892, T. 2084), March 1924, London, 1931, pp. 18, diagrs., tabls.

Wilbur Wright Memorial Lecture. The Wilbur Wright Memorial Lecture. Glenn L. Martin, The development of aircraft manufacturing.

Aeroplane, Vol. 41, No. 6,13 (Aug. 5, Sept. 23, 1931), London, pp. 344-346,768-772, ills.

Wilford. See K., A.: A rival of the autogiro?

Wilkinson, G. S. Napier Lion series VIIB engine for 1927 Schneider Trophy. Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, 1931, pp. 325-327, ills.

Willets, H. N. Radio for airports.

Western Flying, Vol. 9, No. 4 (April 1931), Los Angeles, Cal., pp. 97-98,106.

William Froude National Tank. Report on experiments with model of seaplane float test with the S. 5 duralumin float. Model 807B.

Aer. Res. Comm., Rep. Mem. No. 1300, Jan. 1931, London, 1931, pp. 263-269, tabls., ills., diagrs.

Williams, Blair. U.S.A. Akron.

Western Flying, Vol. 10, No. 2 (Aug. 1931), Los Angeles, Cal., pp. 23-25, ills.

Williams, D. Forces on the engine mounting of a spinning aircraft.

Aircraft Engineer, Flight Engineering Section, Suppl. to No. 1183, Vol. 23, No. 35 (Aug. 28, 1931), London,'pp. 862c-862e (59-61), diagrs.

- A graphical method of stressing aeroplane spars.

Aircraft Enginner, Flight Engineering Section, Suppl. to No. 1161, 1165, Vol. 23, No. 13, 17, (March 27, April 24,1931), London, pp. 272a-272e (17-21), 362a-362c (25-27), diagrs., tabls.

Williams, D. H., and A. R. Collar. Motion of H. M. A. R. 101 under certain assumed conditions.

Aer. Res. Comm., Rep. Mem., No. 1401 (Ae. 522-T. 3132), May 1931, London, 1931, pp. ill. diagrs., tabl.

Williams, D. H., and A. S. Batson. Pressure distribution over a yawed aerofoil, by D. H. Williams, with an appendix on rolling moments on a yawed aerofoil, by A. S. Batson.

Aeronautics, Techn. Rep. Aer. Res. Comm., 1929-1931, Vol. 1, London, 1931, pp. 299-321, diagrs., tabls. Rep. Mem. No. 1203 (Ae. 364.)

Williams, D. H. See Bryant, L. W., and D. H. Williams: The application of the method of operators to the calculation of the disturbed motion of an aeroplane.

Williams, D. L. Hollis. The racing airscrews of 1931.

Aircraft Engineer, Flight Engineering Section, Suppl. to No. 1192, Vol. 23, No. 44 (Oct. 30 1931), London, pp. 1086a-1086c, (73-75), ill., diagrs.

Williams, Frank. Landings—Stall and high speed.

Western Flying, Vol. 9, No. 6 (June 1931), Los Angeles, Cal., pp. 30-31, ill.

Wilson, John. Making airplanes safe. Inspection methods of the Boeing

Airplane Company.

Western Flying, Vol. 10, No. 5 (Nov. 1931), Los Angeles, Cal., pp. 24-25, ills.

Wimperis, H. E. High-speed flying.

Journ. Roy. Aer. Soc, Vol. 35, No. 251 (Nov. 1931), London, pp. 1040-1046.

Wind. A new wind direction indicator.

Flight, No. 1156, Vol. 23, No. 8 (Feb. 20,1931), London, p. 157, ill.

- See Bolla, Filippo: La frequenza del vento al suolo e a quote a Palermo.

- See Bryant, L. W.: Note on change of wind with height.

- See Dryden, Hugh Latimer, and George C. Hill: Wind pressure on a

model of a mill building.

- See Lange, K.O.: Ergebnisse von Messungen vertikaler Windgeschwindigkeiten in der Atmosphäre.

- See Montanari, D.: Contributo alio studio del regime anemologico a

Venezia.

Wind channels. See Wind tunnels.

Wind pressure. See Sylvester, Harold MacTavish: An investigation of pressures and vacua produced on structures by wind.

Wind tunnels. How a wind tunnel works.

Western Flying, Vol. 9, No. 4 (April 1931), Los Angeles, Cal., p. 29.

- Large wind tunnel.

Aeronautics, Tech. Rep. Aer. Comm., 1929-1930, Vol. 1, London, 1931, pp. 38-39.

- Why a vertical wind tunnel.

Western Flying, Vol. 9, No. 4 (April 1931), Los Angeles, Cal., p. 41, ill.

- See Bradfield, F. B., and W. G. A. Perring: Drag tests on a large model in

a small tunnel.

- See Bradfield, F. B.: The 5-ft. open jet wind tunnel, R.A.F.

- See Bradfield, F. B., K. W. Clark, and R. A. Fairthorne: Maximum lift in