NATURE SERIES 



ARE THE EFFECTS OF USE AND 

 DISUSE INHERITED? 



AN EXAMINATION OF THE VIEW HELD BY 

 SPENCER AND DARWIN 



BY 



WILLIAM PLATT BALL 



M 



H o n ti o n 

 MACMILLAN AND CO. 



AND NEW YORK 

 1890 



The Right of Translation and Reproduction is Reserved 



