INTEODUCTION 



TO 



ELEMENTARY PRACTICAL 



BIOLOGY 



a 3Laboratorg <5uiJ)e 



for 



1t)i9b=Scbool an& College Stu&ents 



BY 



CHARLES WRIGHT DODGE, M.S. 



PROFESSOR OF BIOLOGY IN THE UNIVERSITY OF ROCHESTER 



NEW YORK 



HARPER & BROTHERS PUBLISHERS 



1894 



