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Sorr.e elementary principles of shell stress analysis with notes on the use of the shear center, by Paul Kuhn. Washington, 1939. 45 p. diagrs., illus., tables. (N.A.C.A. Technieal notes no. 691)

Eine Einfache beziehung zur absehatzung der gróssten schub-

spannung in elastischen platten, von R. Olsson* Der Bau-ingenieur, Berlin, Dec. 9, 1938, v. 19, no. 49-50, p. 679-80. diagrs., tables.

Letter to the editor:    concerning R. Hatcher^fs "Rational shear

analysis of box girdersⁿ, by Alfred S. Miles. Journal of the aeronautical Sciences, New York, Dec. 1938, v. 6, no. 2, p. 58.

Die StabilitStsgrenze eines gekrUmmten plattenstreifens bei

beanspruchung durch schub- und l&ngskr‘dfte, von A. Kromm. Luftfahrtforschung, MUnchen und Berlin, Oct. 10, 1938, v. 15, no. 10-11, p. 517-26. illus.

Bending stresses in box beams as influenced by shear deformat!on, by Paul Kuhn. S.A.E. Journal, New York, Aug. 1938, v. 43, no. 2, p. 319-24. illus., tables.

On "rational shear analysis of box girders," by Robert S.

Hatcher. Journal of the aeronautical Sciences, New York,

July 1958, v. 5, no. 9, p. 368-69. diagrs., illus. (letter to the Editor)

Sul calcolo aell^fala bilongherone eon rivestimento resistente al taglio, di Placido Cicala. L^fAerotecnica, Roma,

June 1938, v. 18, no. 6, p. 790.

Flexure with shear and associated torsion in prisms of uni-axial and asymetrie cross-sections, by A. C. Stevenson. Phil-osophieal transactions of the Royal society of London, raathematical and physical section, Apr. 14, 1938, ser. A, v. 237, no. 776, p. 161-229. diagrs., illus.

Shearing stress in Steel beams, by Bruce G. Johnston. Civil en-gineering, New York, Apr. 1938, v. 8, no. 4, p. 273. diagrs.

Shear distribution in a sheet-metal box spar, by H.W. Sibert.

Journal of the aeronautical Sciences, New York, Feb. 1938, v. 5, no. 4, p. 154-37. diagrs.,^illus. (Abstracts Journal of the R.A.S., London, May 1938. p. 476 and Technieal data-digest, New York, Apr. 15, 1938;

On "rational shear analysis of box girders," by Paul Kuhn. Journal of the aeronautical Sciences, New York, Jan. 1938, v. 5, no. 3, p. 101. illus. (letter to the Editor)