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 perfect 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.




II

WILD ANIMAL TEMPERAMENT AND INDIVIDUALITY


In man and in vertebrate animals generally, temperament is the
foundation of intelligence and progress. Fifty years ago Fowler
and Wells, the founders of the science of phrenology and
physiognomy, very wisely differentiated and defined four
"temperaments" of mankind. The six types now recognized by me are