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TUBES

The Crinkling strength and bending strength of round aircraft

tubing, by W.R. Osgood. Washington, U.S. Govt. print. off., 1933*    15 p. diagrs., illus., tables. (N.A.C.A. Report

no. 632)

Twisting of thin-7/alled columns perfectly restrained at one end, by Lucio Lazzarino. Washington, 1938.    (N.A.C.A. Technical

memorandums no. 854) (From L¹Aerotecnica, Korna, Oct. 1937, no. 10, p. 850-61)

Variations of shear stress in thin y/alled tubes under torąue, by D. Williams and J. Taylor. London, H.M. Stat. off., 1938.

7 p. diagrs., illus. (A.R.C. R. & M. no. 1812)

Die ErinUćungsfestigkeit dlinnwandiger rohre fUr den flugzeugbau

im ungeschweissten und geschweissten zustand, von H. Cornelius und F. Bollenrath. Luftfahrtforschung, MUnchen und Berlin, Dec. 10, 1937, p. 520-26. tables.

Tubes of rectangular cross section under torąue loads and stress distribution, etc. ("Hardy-Cross" method), by D. Williams. Engineer, London, Febe 12, 1937, p. 177-80. illus.

Etude de la flexion des tubes minces, par L. Blanjean. Bulletin techniąue des ingenieurs de l^ficole połytechniąue, Paris,

1937, no. 2, p. 1-46.

The Experimental deterraination of the bending actions induced by axial end constraints in a rectangular tubę in torsion, by D. Williams and C.B. Smith. London, H.M. Stat. off.,

1937.    19 p. diagrs., illus. (A.R.C. R. Sc M. no. 1775)

The Influence of end constraint on the torsional stiffness of a rectangular section tubę, by J.C.K. Shipp. London, H.M. Stat. off., 1937.    7 p. diagrs. (A.R.C. R. & M. no. 1790)

Torsion of rectangular tubes, by William Hovgaard. Transactions of the A.S.M.E. (Journal of applied mechanics), New York,

1937, v. 59, po A131-A135. diagrs., maps.

Torsion tests of tubes, by A.II. Stang, W. Raraberg and G. Back. Washington, U.S. Govt. print. off., 1937.    21 p. diagrs.,

illus., tables. (N.A.C.A. Report no. 601)

The Strength of braced cylinders, by Thomas McElderry Megaw.

Journal of the Institution of civil engineers, London,

Mar. 1936, no. 5, p, 356-60. illus.

The Stresses in certain tubes of rectangular cross sections under torąue, by D. Williams. London, H.M. Stat. off., 1936.

34 p. illus. (A.R.Co R. & M. no. 1761)