60 THE SPEECH OF MONKEYS. 



a salutation. When kept in a cage with, other 

 monkeys they do not appear to' salute the image 

 in the glass, but chatter to it, and show less sur- 

 prise at seeing it than in cases where they have 

 been kept alone for some time. 



In cases where monkeys have been fed for a 

 long time on bread and milk or on any one kind 

 of food, when a banana is shown him he uses a 

 sound which the phonograph shows to differ 

 slightly from the ordinary food-sound. I have 

 recently had reason to suspect that this differ- 

 ence of inflection somewhat qualifies the sound, 

 and has a tendency to make it more specific. 

 The rapidity with which these creatures utter 

 their speech is so great that only such ears as 

 theirs can detect these very slight inflections. I 

 am now directing my observations and experi- 

 ments to this end, with the hope that I may be able 

 to determine with certainty in what degree they 

 qualify their sounds, by inflections or otherwise. 

 I have observed that in the phonograph the 

 sounds which formerly appeared to me to be the 

 same are easily distinguished when treated in 

 the manner described in the second part of this 

 work, where I have given at length some of my 

 experiments with this wonderful machine. 



