Monographs on Experimental Biology 



INBREEDING AND 

 OUTBREEDING 



. THEIR GENETIC AND SOCIOLOGICAL 

 SIGNIFICANCE ' • 



BY 



EDWARD M. EAST, Ph.D. 



HARVARD UKIVERSITY, BU8SEY INSTITUTION 

 AND 



DONALD F. JONES, Sc.D. 



CONNECTICUT AGRICULTURAL EXPERIMENT STATION 



46 ILLUSTRATIONS 



PHILADELPHIA AND LONDON 

 J. B. LIPPINCOTT COMPANY 





