Nortri^rolin^tat^ibrary 



PIEBALD RATS AiND SELECTION 



AN EXPERIMENTAL TEST OF THE EFFECTIVENESS OF 



SELECTION AND OF THE THEORY OF GAMETIC 



PURITY IN MENDELIAN CROSSES 



BY 

 W. E. CASTLE AND JOHN C. PHILLIPS 



WASHINGTON, D 

 Published by the Carnegie Institut 



1914 



D. H. HILL LIBRARY 

 lie. STrtiE UNIVERSITY 



THIS BOOK IS DUE ON THE DATE 

 INDICATED BELOW AND IS SUB- 

 JECT TO AN OVERDUE FINE AS 

 POSTED AT THE CIRCULATION 

 DESK. 



lOOM/5-79 



