OF WILD ANIMALS 13 



years of age all apes are difficult, or even impossible, as sub- 

 jects for peaceful ejqjerimentation. 



I would try to teach a chimpanzee the difference between a 

 noise and music, between heat and cold, between good food 

 and bad food. Any trainer can teach an animal the difference 

 between the blessings of peace and the horrors of war, or in 

 other words, obedience and good temper versus cussedness and 

 punishment. 



Dr. Yerkes' laboratory in Montecito, California, and his 

 experiments there with an orang-utan and other primates, 

 were in a good place, and made a good beginning. It is very 

 much to be hoped that means will be provided by which his 

 work can be prosecuted indefinitely, and under the most per- 

 fect conditions that money can provide. 



I hope that I will live long enough to see Dr. Yerkes develop 

 the mind of a young grizzly bear in a four-acre lot, to the 

 utmost limits of that keen and sagacious personality. 



