/ ^ ^ f 



at ,5'^ 



a-> 



A CENTURY OF PROGRESS SERIES 



ANIMAL LIFE 



AND SOCIAL 



GROWTH 



BY 

 WARDER CLYDE ALLEE 



Professor of Zoology 

 University of Chicago 





Baltimore 

 The WILLIAMS & WILKINS COMPANY 



AND ASSOCIATES IN COOPERATION WITH 



The CENTURY OF PROGRESS EXPOSITION 

 1932 



