IgO THE SPEECH OF MONKEYS. 



have not the space to go to great length on this 

 subject, and my experiments have not been 

 sufficient to enable me to formulate with certainty 

 any set of rules by which the development of this 

 faculty is uniformly governed. 



It is my purpose on my return from Africa to 

 set on foot a series of such experiments, with the 

 hope of ascertaining the facts connected there- 

 with. And while in Africa I shall aim to make 

 such records of the natives as to ascertain 

 whether their speech conforms to the same laws 

 of development or not. It is my earnest hope to 

 be able to do the same thing with the great apes 

 which I am going chiefly to study. I think if I 

 can record on a phonograph cylinder the sounds 

 uttered by a young chimpanzee under certain 

 conditions once each day for a year or so, I can 

 determine whether there is a like growth in their 

 speech and to what extent the same laws control 

 it. I have already observed that the quality of 

 voice in a given species of monkey changes with 

 his age, very much in the same manner as the 

 human voice ; but I have not been able to follow 

 the changes through one individual specimen by 

 which to ascertain the exact manner of such 

 change. 



