J^PR 6 1956 



Behavior Monographs 



Volume 3, Number I, 1916 Serial Number 12 



Edited by JOHN B. WATSON 



The Johns Hopkins University 



The Mental Life of Monkeys and Apes: 

 A Study of Ideational Behavior 



ROBERT M. YERKES 



Published 



at Cambridge. Boston, Mass. 



HENRY HOLT & COMPANY 



34 West 33d Street, New York 



G. E. STECHERT & CO., London. Paris and Leipzig. Foreign AgenU 



