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SHEAR

Graphical calculus (with special reference to shear, moment and deflection diagrams), by Charles A. Ellis. Journal of the Western society of engineers, Chicago, Apr- 1917, v. 22, p. 189-275.

Tables for determining the benaing moments and shears in simple beams and in beams fixed at one and both ends, by S. M. Cotten. Engineering and eontraćting, Chicago, 111., Apr.

14, 1915, v. 43, p. 335-40. diagrs., tables.

Shear in beams, by E. Lonson. Engineering record, New York, Jan. 2, 1915, v. 71, p. 25.

Compound stresses: elastic limit vrith corapound stresses and the maximum shear t.heory, by Sanford A. Moss. Machinery,

New York, Aug. 1914, v. 20, p. 1046-48. diagrs., illus.

Kurven reiner schubbeanspruchung des geraden balkentrSgers

rechteckigen ąuerschnittes, von Josef Wagner. Zeitschrift des Oesterreichischen ingenieur-und architekten-vereines, Wien, Sep. 29, 1911, v. 63, no. 39-40, p. 615, 628-34. diagrs.

SPARS

Uber die kippstabilitSt der holme im rippenverband, von J. Weinhold. Z.A.M.M., Berlin, Oct. 1S38, v. 18, no. 5, p. 272-84. illus., tables.

Deux problemes d¹echantillonnage optimum. 1. Flambement des tubes cylindriąues.    2. Flexicn et compression des

lonęerons-caissons en bois, par Stanislas Schneider.

L^fAeronautiąue, P&ris, Aug.-Sep. 1938, v. 17, no. 188-189, p. 93-97; 109-14. diagrs., illus.

Torsion in rectangular spar~boxes, by H. Davies. Aircraft

engineering, London, July 1938, v. 10, no. 113, p. 221-23. diagrs., tables.

The Strength of wooden spars, by T.fl. Payne. Flight, London,

Mar. 21, Apr. 21, 1938, p. 21-23; 25-26. diagrs., illus.

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. 134-37. diagrs., illus. (Abstracts Journal of the R.A.S., London, May 1938. p. 476 and Technical data digest, New York, Apr. 15, 1938;

Relaxation methods applied to a spar of varying sections, deflection by transverse loading, etc., by R.J. Atkinson, K.N.E. Bradfield and R.V. Southwell. London, H.M. Stat. off., 1938.    (A.R.C. R. & M. no. 1822)