/ <-> . I- 



MONOGRAPHS ON EXPERIMENTAL BIOLOGY 



INBREEDING AND 

 OUTBREEDING 



THEIR GENETIC AND SOCIOLOGICAL 



SIGNIFICANCE 



BY 



EDWARD M. EAST, PH.D. 



HARVARD UNIVERSITY, BU8SEY INSTITUTION 



AND 



DONALD F. JONES, Sc.D. 



CONNECTICUT AGRICULTURAL EXPERIMENT STATION 



46 ILLUSTRATIONS 



PHILADELPHIA AND LONDON 

 J. B. LIPPINCOTT COMPANY 



