GENERAL AND 

 PROFESSIONAL BIOLOGY 



with Special Reference to Man 



EDWARD J MENGE, Ph. D, Sc. D. 



Director of the Department of Zoology, Marquette University 

 Late Professor of Biology, University of Dallas 



THIRD EDITION, REVISED 



VOLUME I 

 GENERAL BIOLOGY 



THE BRUCE PUBLISHING COMPANY 



MILWAUKEE, WISCONSIN 



NEW YORK - CHICAGO 



