212 



SCIENCE 



[N. S. Vol. XLIII. No. 1102 



Explorations in the Birusa Caves and Rock 

 Shelters on the Yenisei River, Siberia; Devel- 

 opment of the Child among the ISTegrito, the 

 African Negro, the Eskimo, and Native 

 Siberians. 



10. A Theory of Nerve-Conduction: A. G. 

 Mater, Department of Marine Biology, 

 Carnegie Institution of Washington. 



The theory of nerve-conduction is based 

 upon the phenomena of adsorption. The re- 

 sults lend no support to the theory that the 

 velocity of propagation of nerve impulse is 

 that of a shear in the substance of the nerve. 



11. Zuni Culture Sequences: A. L. Kroeber, 

 Museum of the Affiliated Colleges, San 

 Francisco. 



The author gathered a large number of 

 potsherds in and near Zuni, and is able to 

 make a tentative chronological classification 

 of the objects. 



12. The Numerical Results of Diverse Systems 

 of Breeding: H. S. Jennings, Zoological 

 Laboratory, Johns Hopkins University. 

 The proportions of the population which are 



found after n generations arising from con- 

 tinued breeding in various ways are tabulated 

 for 34 different methods of mating. 



13. On the Effects of Feeding Pituitary Body 

 (Anterior Lole) Sulstance, and Corpus 

 Luteum Substance to Growing Chicks: 

 Raymond Pearl, Biological Laboratory, 

 Maine Agricultural Experiment Station. 

 The commencement of the laying period in 



pullets is neither retarded nor accelerated by 

 feeding pituitary and corpus substance, but 

 the body growth is retarded. 



14. A Preliminary Report on Further Experi- 

 ments in Inheritance and Determination of 

 Sex: Richard Goldschmidt, Osborn Zoo- 

 logical Laboratory, Yale University. 



The article states a number of new results 

 found by the author in continuing his earlier 

 work on the interbreeding of gypsy moths. 

 Every gradation of intersexualism from a 

 normal female to a normal male, and from a 

 male three-fourths of the way toward the 

 female has been obtained. 



15. On the Degree of Inireeding which exists 

 in American Jersey Cattle : Raymond Pearl 

 and S. W. Patterson, Biological Laboratory, 

 Maine Agricultural Experiment Station. 

 American Jersey cattle are about one half 



as intensely inbred when eight generations 

 are taken into account as would be the case 

 if continued brother X sister breeding had 

 been followed. In general. Register of Merit 

 animals are less intensely inbred than the ordi- 

 nary population. 



16. Upper Limit of the Degree of Transitivity 

 of a Substitution Group: G. A. Miller, 

 Department of Mathematics, University of 

 Illinois. 



The degree of transitivity of a substitution 

 group of degree n which does not include the 

 alternating group of this degree is always less 

 than %\/n — l. 



lY. The Extension of the Montana Phosphate 

 Deposits Northward into Canada: F. D. 

 Adams and W. J. Dick, Commission of Con- 

 servation of Canada. 



An accoimt of the explorations carried out 

 to ascertain whether phosphate-bearing rocks 

 extend northward from Utah, Idaho, and Mon- 

 tana into Canada. In some places such an ex- 

 tension has been foimd. 



Edwin Bidwell Wilson 

 Mass. Inst, op Tech. 



NOTES ON METEOROLOGY AND 

 CLIMATOLOGY 



SNOWFALL AND SNOW COVER 



The destructive snowstorm of December 13, 

 1915, in the vicinity of New York showed 

 strikingly the ocean control on the depth of 

 snowfall. While the precipitation (rain and 

 melted snow) was heavy everywhere, the depth 

 of snowfall, according to press reports, ranged 

 from little or nothing in eastern Massachu- 

 setts to one foot between New York and New 

 Haven and two feet near Albany. The warmth 

 of the ocean effectively prevented snowfall 

 where the winds blew off the water and made 

 it sticky and dense near the coast, even though 

 the surface wind was from the north. Not 

 until February or March does heavy snowfall 

 usually occur with winds from the ocean. A 



