328 



INDEX 



Yerkes, Dr. Robert M., 13, 119; ex- 

 periments with monkeys and orang- 

 utans, 81. 



Z 



Zalophus, under training, 212. 



Zebra, courage of, 259; terrifying ex- 

 periment with, 259. 



Zoological Park, New York; beaver 

 house, 169; birds, 1 88-191; chim- 

 panzees born, 90, 91; elephant at- 

 tacks keeper, 310; escape of bears, 



124; fallow deer return to, 176; 

 fighting between cow elk, 282; fight 

 of baboons, 243; grizzly bear cub, 

 245; Heads and Horns Collection, 

 221; laughing gull breeding, 251; 

 murder by buffalo bull, 296; murder 

 of deer, 288; murder of jaguar, 290; 

 murder of polar bear, 293 ; no keep- 

 ers killed, 302; orang-utans, 73; 

 play of cranes, 240; rescue of bear 

 cub in Nursery Den, 34; savage 

 wild boar, 253; tame squirrels, 165; 

 rabbits, 168; tiger fight, 277; weav- 

 er birds, 65; wild ducks visit, 176. 



