VOL. XLVII, NO. 553 



JANUARY, 1913 



THE 



AMERICAN 

 NATURALIST 



A MONTHLY JOURNAL 

 Devoted to the Advancement of the Biological Science! with 

 Special Reference to the Factors of Evolution 



HI. A Family of Spotted Negroes. Q. I. Simpson and Professor VV. E. castle - i 

 IV. The Effect of Fertilizer son Variation in Corn and Beans. Professor J. K.Shaw I 



THE SCIENCE PRESS 

 LANCASTER, PA. GARRISON, N. Y. 



NEW YORK: SUB-STATION 84 



