ECOLOGY
A. L. Paducheva, V. V. Kcyalsky 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 sturegeon-larvae within the period from hatching to the active mode of feeding under of 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 the article by N. A. Bogomolova, “Nucleic Acids in the Ovogenesis 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. Ovogenesis 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 egg of the liver fluke. Visible are spermatozoa (1), egg cells (2), and vitelline cells (3). a—in the egg cell, a threadlike spermatozoon and metaphase of the first maturation division; b—the sperm has acquired a semilunar shape; v—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. Shulindin, “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 on the 14- and 10-hour day did not head.

T-04808. Signed for printing 18 V 1957. Print run 5900 copies. Order 1315.
Paper size 70×108 1/16. 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.