TABLE OF CONTENTS 

 I. TRAITS OF YOUNG CHIMPANZEES 



BY ROBERT M. YERKES 



CHAPTER I 



PAGE 



Provision for Comparative Study of the Primates 11 



CHAPTER II 

 History and Care of a Pair of Chimpanzees 15 



CHAPTER III 

 Physical Traits 20 



CHAPTER IV 



Mental Traits 26 



Daily routine 26 



Temperament 29 



Nest building 36 



CHAPTER V 



Evidences of Insight 38 



Observational ability 38 



Adaptability 39 



Insight and ideation 41 



CHAPTER VI 

 Sounds and Speech 53 



7 ^3^-7? 



