Monographs on Experimental Biology 



INBREEDING AND 

 OUTBREEDING 



THEIR GENETIC AND SOCIOLOGICAL 



SIGNIFICANCE 



BY ^^ 



EDWARD M. EAST, Ph.D. 



HARVARD UNIVERSITY, BUSSEY INSTITUTION 



AND 



DONALD F. JONES, Sc.D. 



CONNECTICUT AGRICULTURAL EXPERIMENT STATION 



i6 ILLUSTRATIONS 



PHILADELPHIA AND LONDON 

 J. B. LIPPINCOTT COMPANY 



