APPLIED BIOLOGY 



AN ELEMENTARY TEXTBOOK AND 

 LABORATORY GUIDE 



BY 



MAURICE A. BIGELOW, PH.D. 



PROFESSOR OF BIOLOGY IN TEACHERS COLLEGE, COLUMBIA 



UNIVERSITY; CO-AUTHOR OF THE "TEACHING OF 



BIOLOGY IN THE SECONDARY SCHOOL" 



AND 



ANNA N. BIGELOW, M.S. 



TEACHER OF HIGH-SCHOOL BIOLOGY 



THE MACMILLAN COMPANY 

 1911 



-All rights reserved, 



