BOOKS BY 

 WILLIAM EMERSON HITTER 



THE HIGHER USEFULNESS OP SCI- 

 ENCE. 



THE UNITY OP THE ORGANISM. Il- 

 lustrated. 



THE UNITY OP THE ORGANIC SPECIES, 

 WITH SPECIAL REFERENCE TO THE 

 HUMAN SPECIES. 



RICHARD G. BADGER, PUBLISHER, BOSTON 



