16 APES AND MONKEYS 



affectionate and childlike, but when large and strong the 

 males are usually dangerous and not to be trusted. Some 

 individuals have displayed remarkable intelligence. " Sally," 

 of the London Zoological Gardens, could count correctly up 

 to five, whenever bidden, and hand out the correct number of 

 straws. Several very intelligent Chimpanzees have been ex- 

 hibited for long periods in the New York Zoological Park, 

 where a large collection of apes is constantly maintained. 



After several years of observation of living Chimpanzees 

 and orang-utans, in daily comparison, I am convinced that 

 the only substantial psychological differences between the 

 two species are that the temperament of the Chimpanzee is 

 of the nervous type, and its mind is more alert and prompt 

 in action than that of the orang, while on the other hand 

 the temperament of the orang is sanguine, its disposition is 

 more serene, and while its mind may be somewhat less showy 

 on exhibition, its capacity is very nearly equal to that of 

 the Chimpanzee. The greater quickness of the Chimpanzee, 

 both in thought and action, renders it on the whole the best 

 show animal in public performances. 



Many persons consider the Chimpanzee superior in intelli- 

 gence to the orang-utan, but thus far the only real difference 

 appears to be that the mind of the former is more alert, and 

 acts more quickly than that of the orang. This renders the 

 former a more showy animal. 



In walking, the Chimpanzee does not place the palms of 

 its hands flat upon the ground, but bends its fingers at the 

 middle joint, and walks upon its knuckles. 



It does not, as so often is asserted on hearsay evidence, 



