7 V 



ELEMENTARY BIOLOGY 



a 



AN INTRODUCTION TO 

 THE SCIENCE OF LIFE 



BY 



BENJAMIN C. GRUENBERG 



FORMERt.Y HEAD OF BIOLOGY DEPARTMENT, IN THE 

 JULIA RICHMAN HIGH SCHOOL, NEW YORK 



GINN AND COMPANY 



BOSTON • NEW YORK • CHICAGO • LONDON 

 ATLANTA • DALLAS • COLUMBUS • SAN FRANCISCO 



