ELEMENTS OF BIOLOGY 



A PRACTICAL TEXT-BOOK COR- 

 RELATING BOTANY, ZOOLOGY, 

 AND HUMAN PHYSIOLOGY 



BY 



GEORGE WILLIAM HUNTER, A.M. 



Head of the Depaktment of Biology, De Witt Clinton High School, 



New York 



NEW YORK .:. CINCINNATI •:• CHICAGO 



AMERICAN BOOK COMPANY 



