VOL. XI.IV, NO. 517 



JANUARY, 1810 



THE 



AMERICAN 

 NATURALIST 



A MONTHLY JOURNAL 



Devoted to the Advancement of the Biological Sciences with 

 Special Reference to the Factors of Evolution 



CONTENTS 



Pagt 



I. Tbe Reappearance in the Offspring of artificially produced Parental Modi- 

 fications. Dr. FRANCIS B. SUMNER ........ 5 



THE SCIENCE PRESS 



LANCASTER, PA. GARRISON, N. Y. 



NEW YORK : SUB -STATION 84 



