HEREDITY AND 

 EUGENICS 



BY 



R. RUGGLES GATES, Ph.D., F.L.S. 



PROFESSOR OF EOTAKY IN 1 HE UNIVERSITY OK LONDO.N A.ND HEAD OF THE 



DEPARTMENT OF BOTANY AT KING'S COLLEGE: 



SOMETI.ME ASSOCIATE PROFESSOR OF ZOOLOGY, UNIVERSITY OF CALIFoKNIA; 



AUTHOR OF "the MUTATION FACTOR IN EVOLUTION," ETC. 



CONSTABLE AND CO. LTD, 



LONDON BOMBAY SYDNEY 



1923 



fltO^ERTT mRARY 



N. C. SiMte C^Uegf 



