i 0>, ^ 



BIOLOGY 

 AND HUMAN LIFE 



^ 



BY 



BENJAMIN C. GRUENBERG 



FORMERLY HEAD OF THE BIOLOGY DEPARTMENT IN THE 

 JULIA RICHMAN HIGH SCHOOL, NEW YORK 



GINN AND COMPANY 



BOSTON • NEW YORK • CHICAGO • LONDON 

 ATLANTA • DALLAS • COLUMBUS • SAN FRANCISCO 



