SOUNDS ASSOCIATED WITH FOOD 



69 



cmM s "remarks in experiments 



Occasional mention has been made of certain "experi- 

 ments" which were made to test and analyze the intelligence 

 of the chimpanzees. In a few of these, Chim 's vocal behavior 

 was noted and inasmuch as all of them involved food, either 

 as inducement or as a reward, they are introduced as a conclu- 

 sion to the present chapter. 



This experiment took place in the morning before Chim 

 had eaten breakfast: 



During his efforts to solve the problem he whined softly, 

 at first, but grew increasingly impatient raising his voice in 

 pitch and increasing its volume: 



^ 



U'l^ i ^uii/i^^ ^ 



u& 



Jt-2^ 



V l^ l^ U* 



S: 



34 



PP 



f 



~ff, 



He finally burst into his loud scream: 



2 2 



8va 8va. 



TT.T 



P^P (^ 



i^ 





I I ^ 



=ffi^& 



42- 



^ 



-t^- 



t 



ae 



/ 



35 



ae 



ae 



Continuing his endeavor, he alternated his piercing single 

 and double-toned scream with whining phrases throughout 

 the test. The whining varied in loudness from a fine pianis- 

 simo to a forte. They were beautiful tones and rather piti- 

 ful in their appealing quahty: 



36 



