512 READINGS IN EVOLUTION, GENETICS, AND EUGENICS 
TxHomson, J. ARTHUR. Darwinism and Human Life. Henry Holt & Co., 
1909. 
. Heredity. John Murray, London, 1907. 
WALTER, HERBERT EUGENE. Genetics. The Macmillan Co., 1911. 
WHITMAN, CuarLes Otis. “The Problem of the Origin of Species.” 
Proceedings of Congress of Aris and Science, Universal Exposition, 
St. Louis, 1906. 
WRIGHT, SEWALL. Principles of Livestock Breeding. U.S. Dept. Agri- 
culture, Bull. 905, 1920. 
