HISTOLOGY

V. I. Deribas, B. B. Fuks, G. S. Shishkin. On the activization of lipolytic enzymes in the wall of human aorta in the case of aterosclerosis . . . . . . . 443

E. I. Koloss. On the functional rôle of tonic myons in lower vertebrates . . . 445

GENETICS

B. L. Astaurov, T. A. Bedniakova, G. I. Ginzburg, I. B. Zbarskii, G. P. Ramenskaia. An attempt to induce hereditary variations in Bombyx mori L. by means of interlinear injections of desoxyribonucleic acid . . . . . . . 449

ECOLOGY

S. N. Ulomskii. On the ecology of Mesocyclops crassus (S. Fisch.), 1853 (Crustacea, Copepoda . . . . . . . . . . . . . . . . . . . . . . . . 453

BIOCHEMISTRY

N. A. Andreeva. The rôle of different parts of the molecule of folic acid in the biosynthesis of purine and pyrimidine bases in plants . . . . . . . . . 457

M. I. Lerman, S. R. Mardashev. Enzymatic exchange of ammonia with the amidegroup of α-ketosuccinamic acid . . . . . . . . . . . . . . . . . 460

V. K. Liapidevskii. A model of colour vision . . . . . . . . . . . . . . . . 463

I. G. Stoianova, T. A. Nekrasova. A study of live microorganisms under the electron microscope by the method of a gas microchamber . . . . . . . 467

PLANT MORPHOLOGY

I. A. Shul’gin, V. S. Khazanov, A. F. Kleshnin. On the nature of the reflection of radiant energy dependent on the structure of the leaf . . . . . . . 471

PLANT PHYSIOLOGY

A. N. Pavlov. Certain peculiarities in the nitrogen uptake by leaves of Zea mays given additional foliar nutrition in the form of urea . . . . . . . 475

ZOOLOGY

E. I. Lukin, V. M. Epstein. The leeches of the subfamily Toricinae subfam. n. and their geographic distribution . . . . . . . . . . . . . . . . . . 478

MORPHOLOGY

V. I. Kosobutskii. A quantitative description of the marrow in upgrown rabbits of the chinchilla breed . . . . . . . . . . . . . . . . . . . . . 482

PHYSIOLOGY

E. B. Babsky, L. A. Ioffe, V. L. Karpman. Frontal vectordynamocardiogram . . . 485

L. A. Zilber, L. A. Ludvigovskaia. On the adsorption of specific tumor antigens on red blood corpuscles . . . . . . . . . . . . . . . . . . . . 489

EMBRIOLOGY

K. M. Kurnosov. Pseudo-placentary vascular anastomoses in the case of embryonic parabiosis and free-martinism phenomenon in sheep . . . . . . . 493

ERRATUM

In the article by G. A. Bessmertnykh, “On two approximate methods for solving operator equations in Hilbert space,” published in Dokl. Akad. Nauk, vol. 131, no. 2, 1960:

on p. 227, line 3 from the bottom, printed:

\[ \frac{4(\gamma_k+\mu_k)^2(A^2 r_k, r_k)} {(\gamma_k+2\mu_k)^2\,\mu_k(r_k,r_k)} =\ldots, \]

should read:

\[ \frac{4(\gamma_k+\mu_k)} {(\gamma_k+2\mu_k)^2}\, \frac{(A^2 r_k, r_k)} {\mu_k(r_k,r_k)} =\ldots; \]

on p. 227, line 1 from the bottom, printed:

\[ \ldots \geq \frac{M/m+1}{(M/m+2)^2}\, \frac{(M+m)m}{(M+2m)^2}, \]

should read:

\[ \ldots \geq \frac{M/m+1}{(M/m+2)^2} = \frac{(M+m)m}{(M+2m)^2}. \]

T-11268. Signed for printing 9 IX 1960. Print run 5135 copies. Order 793.
Paper size 70×108 1/16. Paper sheets 8. Printed sheets 21.92+5 inserts. Publisher’s sheets 22.6.
2nd Printing House of the Publishing House of the Academy of Sciences of the USSR. Moscow, Shubinskii Lane, 10.