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TORSJOM

The Torsion and flexure of cylinders and tubes, by W. J. Duncan. London, H-M. Stat. off., 1932.    78 p. illus., tables.

(A.R.C. R. & M. no. 1444)

Torsional rigidity in cantilever wings, by C. G. Brown. Aviatl. on englneering, New York, Dec. 1931, v. 5, no. 5, p. 11-14. diagrs.

Torsion in tnin cylinders, by E.H. Atkin. Aircraft englneering, London, Sep. 25, Oct. 30, 1931, v. 23, no. 39, 44, p. 970f-h 1086d-h. illus.

Steady torsion combined with alternating bending, by J. B.

Kommers. Englneering, London, Aug. 28, 1931, v. 132, p. 249.

Zur praxis des drehwerksyerfahrcns, von H. Minnich. Zentral-blatt der bauverwaltung, Berlin, Aug. 12, 1931, v. 51, no. 33, p. 482-86. diagrs.

Die Verdrehsteifigkeit und verdrehfestigkeit von flugzeugbautelien, von Heinrich Hertel. Luftfahrtforschung, MUnchen und Berlin, Aug. 1, 1931, v. 9, no. 1, p. 1-56.

Torsioniń-box wings, by John B. Wheatley. Washington, 1931.

44 p. diagrs. (N.A.C.A. Technical notes no. 366)

Sur la torsion des poutres prisnatiąues h. section rectangulaire, par M. Roy. Annales des mines, Paris, Dec. 1930, v. 18, no. 12, p. 249-73. illus.

Shaft stresses due to torsional impact, by W.A. Tuplin. Engineer, London, Aug. 1, 1930, v. 150, p. 112-15.

Ufcer die torsion von walzeisenprofilen, von C. Schmieden. Z.A.M.N., Berlin, May, June 1930, v. 10, no. 3, p. 251-66. diagrs.

Several cases of non-circular torsion solved by analysis and

direct test, by James Orr. London, H.M. Stat. off., 1950.

21 p. illus. (A.R.C. R. & M. no. 1393)

The Torsion *of mernbers having sections common in aircraft con-struction, by George W. Trayer and H.W. March. Washington,

U. S. Govt. prińt. off., 1930.    48 p. diagrs. (N.A.C.A.

Report no. 334)

0

Torsional effects of transverse bending loads on channel beams, by F.B. Seely, W.J. Putnam and W.L. Schwalbę. Urbana, Ili., University of Illinois, 1930.    66 p. diagrs. (Englneering

experiment station no. 44)

Cantilever wings; an investigation of torsional strength and

stiffness, by F. Duncanson. Flight, London, Juzie 27, 1929, v. 21, no. 26, p. 522a-c.