THEORY OF ELASTICITY

L. S. Srubshchik. Asymptotic behaviour of Reissner’s equations in the non-linear theory of symmetrically loaded rotational shells — 530

PHYSICS

E. I. Adirovich, L. A. Dubrovskii, V. M. Rubinov, L. B. Suzdalkina. Optical properties of films on semiconductor substrates — 534

N. K. Morozova, V. P. Morozov. The reduction of energy operators with reference to symmetry in the theory of molecular vibrations — 538

G. A. Odisharia, V. N. Shrednik. Bond energy determination in two-dimensional crystals of zirconium adsorbed on tungsten and niobium — 542

B. I. Stepanov. Loss sources in organic-dye quantum generators — 545

A. V. Tulub. Use of Fock’s expansion in the theory of Van der Waals forces — 549

TECHNICAL PHYSICS

J. E. Geguzin, I. V. Vorobieva, A. G. Suslova, L. D. Demianov, L. S. Selina. Structure and healing of tracks from nuclear fission fragments in single crystals of LiF and CaCO₃ — 552

Iu. I. Linnik, B. I. Kostetskii. Energy balance in boundary friction when surface-active substances are present — 555

L. E. Popov, N. V. Kozhemiakin. On the pinning of superdislocation in B2 superstructure — 559

E. M. Savitskii, I. V. Burov, S. V. Pirogova. Computed and experimental values of electric conductivity for molybdenum-niobium alloys — 562

GEOPHYSICS

N. E. Galdin. On the composition and elastic parameters of the upper mantle — 565

CRYSTALLOGRAPHY

B. K. Vainstein, V. V. Barynin, G. V. Gurskaia. Hexagonal crystal structure of catalase and structure of its molecules — 569

A. V. Nikitin, M. I. Samoilovich, G. N. Bezrukov, K. F. Vorozheikin. The influence of heating and pressure on certain physical properties of diamonds — 573

L. E. Fykin, Y. V. Glazova, I. I. Kornilov, R. P. Ozerov, V. P. Smirnov, S. P. Soloviev. The crystal structure of suboxide Ti₂ZrO — 576

ERRATA

In the article by L. L. Tsinman, “On the axiom of complete induction,” published in DAN, vol. 173, no. 2, on p. 174, line 17, where it is printed “it was indicated that $\bar{K}^{(l)}$,” it should read “it was indicated that $\bar{K}^{(l)} \subset K^{(l)}$.”

In the article by G. L. Frum-Ketkov, “On mappings into the sphere of a Banach space,” published in DAN, vol. 175, no. 6, 1967, on p. 1229, line 13 from the bottom, where it is printed $\dot{q}(\Omega \cap T)\cap DT=\varnothing$, it should read $f(\Omega \cup T)\cap DT=\varnothing$.

Submitted for typesetting 3/VII-1968. T. 11781. Signed for printing 29/VIII-1968. Print run 1485 copies.
Order 815. Paper format 70×108¹/₁₆. Printers’ sheets 22.93+4 inserts. Paper sheets 8³/₁₆. Publisher’s sheets 24.
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