PREFACE 



This contribution to our knowledge of the traits and vocal 

 expressions of the young chimpanzee is presented humbly 

 as the first chapter in a continued story. The division of 

 responsibility between the authors is clear. The one, a 

 psychologist, is intent on the description of important traits 

 and the analysis of ideational behavior in chimpanzees and 

 other primates. The other, a musician, has carefully 

 attended to the vocalizations of the chimpanzee and has 

 given a truthful and vivid account of vocal expressions under 

 different circumstances. 



The facts recorded in this volume should be useful to 

 musicians, linguists, and psychologists. 



The Authors 



June, 1924 



