374 EXPERIMENT STATION EECOED. 



biued produced much more rapid gains tliau peanuts alone. The quality of the 

 pork produced by peanuts was much inferior to that produced by corn." 



Analyses are given of corn chops, rice bran, tankage, peanut kernel, peanut 

 hull, and the entire peanut. 



Yearbook of scientific and practical animal breeding, edited by G. Wilsdorf 

 and K. Muller {Jahrb. Wiss. u. Prakt. Tierzucht, 5 (.1910), pp. V+392, figs. 

 35). — Part 1 of this yearbook contains original articles by Bosch, Hilzheimer, 

 Macalik, and Schottler (noted below). Part 2 consists, as usual, of abstracts of 

 current literature on zootechny. Part 3, which is a new feature, includes brief 

 notes by breeders concerning their observations and experiences connected with 

 practical breeding operations. 



Recent works in the literature of animal breeding, H. Kraemer {Mitt. Deut. 

 Landw. Gsell., 25 {1910), Nos. 26, pp. JfOS-W ; 32, pp. Jfll-JtW ; 1,5, pp. 653- 

 656). — A review of a number of important publications relating to animal in- 

 dustry which have recently appeared in the German, French, English, and Scan- 

 dinavian languages. 



Evolution, biological and human, F. Sacco {U Evolution Biologique et 

 Jlumaine. Turin and Paris. 1910, pp. VIIl-\-.'i30, pi. 1). — A synthetical account 

 of the evolution of the higher forms of plants and animals from lower types 

 during the succession of geological epochs, including both organic and psychic 

 human evolution. 



The sociological and political significance of heredity and selection, W. 

 ScHALLMAYER {Verehung und Auslese in ihrer Soziologischen und PoUtischen 

 Bedeutung. Jena, 1910, 2. ed., rev. and enl., pp. XVIlI+Ji63, figs. 10). — This 

 book summarizes the i-esults obtained by investigations of biologists concerning 

 variation, heredity, and selection. The necessity of profiting by this informa- 

 tion in the improvement of man as well as other animals is pointed out. There 

 are numerous references to the literature on the subject. 



Modern study of heredity, A. Gallardo {Las Invesligaciones Modrrnes sobre 

 la Uerencia en Biologia. Cordoba, 1909, pp. 72; rev. in Jour. Roy. Micros. Soc. 

 [London], 1910, A'o. 5, pp. 557). — A review of recent work on heredity, with 

 particular reference to biometry and Mendelian studies. 



The crisis of transforniism, F. Le Dantec {La Crisc du Transformisme. 

 Paris, 1909, pp. VI+292; rev. in Ztschr. InduMive Ahstam. u. Vererbungslehrc, 

 4 {1910), No. 2, pp. VfJi, lli5). — In this book the mutation theory of species is 

 criticised, and the author advocates the use of chemical terms in describing bio- 

 logical phenomena in order to avoid ambiguity. 



The Mendelian theory of heredity and the augmentation of vigor, A. B. 

 Bruce {Science, n. ser., 32 {1910), No. 827, pp. 627, 628). — Assuming that domi- 

 nance is positively correlated with vigor, the author offers a mathematical 

 demonstration to show that the crossing of two pure breeds produces a mean 

 vigor greater than the collective mean vigor of the parent breeds, and that the 

 inbreeding of a Mendelian population leads to a decrease in the mean number 

 of elements of the types (DD) and (DR). 



The significance of the correlation coefficient when applied to Mendelian 

 distributions, J. Brownlee {Proc. Roy. Soc. Edinb., 30 {1909-10), No. 6, pp. 

 .',73-507). — Investigations are reported of the conditions under which the Men- 

 delian theory is capable of accounting for the facts concerning the transmission 

 of characters from parent to offspring. The various factors which influence 

 correlation, such as (1) the influence of different methods of calculating cor- 

 relation of coefficients, (2) assertive mating, (3) correlation coefficients when 

 more than 2 races mis, are treated mathematically. The results obtained are 

 applied to the work of Karl Pearson on the inheritance of coat color in horses, 

 cattle, and greyhounds. 



