ECOLOGY
A. L. Paducheva, V. V. Kovalsky and B. S. Shraer. Adaptational changes in the “insensible” losses in karakul sheep kept under different temperature conditions and less frequent watering . . . . . . . . . . . . . . . . . 923

PLANT PHYSIOLOGY
N. P. Krasulin and N. M. Pankratova. Transpiration as an index of water absorption by the root system of forest tree species . . . . . . . . . . . . . 927

PHYSIOLOGY
N. A. Itina. The response of a tadpole’s heart to acetylcholine . . . . . . . 930
S. L. Levin. On the reactions of a partly denervated parotid gland in man, proceeding according to the type of N-choline reactive structure . . . . 934

EMBRYOLOGY
K. I. Semenov. On the influence of different light conditions upon the development of sturgeon-larvae within the period from hatching to the active mode of feeding under artificial breeding . . . . . . . . . . . . . . 937
G. A. Schmidt. Heterochroniae observed during the development of primary germ layers and coelomic mesoderm in a cattle embryo (Bos taurus) . . . 941

CORRECTIONS

In N. A. Bogomolova’s article “Nucleic Acids in the Oogenesis and Fertilization of the Liver Fluke (Fasciola hepatica L.),” published in DAN, vol. 110, No. 3, 1956, the captions to the figures should read:

Fig. 1. Oogenesis of the liver fluke. a—RNA in oogonia (1) and oocytes (2); b—DNA in oogonia; v—DNA in oocytes. Carnoy, methyl green–pyronin (a), Feulgen reaction (b and v).

Fig. 2. Different stages of fertilization of the liver-fluke egg. Spermatozoa (1), egg cells (2), and vitelline cells (3) are visible. a—in the egg cell, a threadlike spermatozoon and metaphase of the first maturation division; b—the sperm has acquired a semilunar shape; v—a sperm of rounded shape; g—formed pronuclei. On the surface of the egg cell are polar bodies. Carnoy, Feulgen reaction.

In the article by E. M. Poltarev and A. F. Shulyndin, “Formation of the Light Stage in Plants of Interspecific Wheat Hybrids,” published in DAN, vol. 110, No. 5, 1956, p. 867, line 10 from the bottom should read: soft wheats did not head on the 14th and 10th days.

T-04808. Signed for printing 18 V 1957. Print run 5900 copies. Order 1315.
Paper format 70×108¹/₁₆. Paper sheets 7. Printed sheets 19.18 + 4 inserts. Publisher’s sheets 19.2.
2nd Printing House of the Publishing House of the Academy of Sciences of the USSR. Moscow, Shubinsky Lane, 10.