OBSERVATIONS AT NEW YORK ZOOLOGICAL PARK 149 



with his feet thrown up against an iron door in the wall of his 

 cage. 



Fanny sometimes joined in the call for food with whoo- 

 woo-woo: 



i± 



'^^^i^- 



n 



292 whoo-woo-woo, - - - » - - 



And a hoarse bark on a single tone, followed by whoo-woo- 

 wah: 



^^^ 



I I I -ai i I s ^ H^ etc. 



^—^ — -*-i t: 



293 iih-uh-uh-uh--uh-uh--uh-whoo-woo-wah, - - - 



Suzette uttered occasional tones of approval to Boma's 

 calls, but was usually silent, although very active in her 

 cage. 



^^^ - 



P 

 294 ^ 



woo - - woo ooh 



After several days of observation with no indication that 

 Boma made use of a food-word comparable to that which 

 Chim and Panzee used — gahk, or one of its variants — ^per- 

 mission was asked to feed the chimpanzees, in the hope of 

 gaining some response by speaking the word while offering 

 food. A large juicy apple was given him and gahk repeated 

 several times. He responded with a broad smile of apprecia- 

 tion, and retired to his high perch to eat it. Then he was 

 asked if he liked it, this time responding with gah, gah, ah. 



