Nip and Tuck being fed as a reward for faithful service in an experiment. These two pigs were 

 observed for several hours each day throughout one summer. Nip was less active than his sister Tuck, 

 and also less greedy, but botli worked remarkably well on their ideational problems under the spur of 

 hunger, and their success justified the impression that the pig is one of the more intelligent mammals 





At the left is shown Jim Crow in his favorite feeding place; at the right our carnivorous pet is evin- 

 cing his marked preference for attached morsels. One summer we removed a brood of young crows from 

 the nest and reared them by hand. They thrived mightily and soon became very tame, showing marked 

 temperamental differences ; in fact, the four specimens were as different in temperament as are the chil- 

 dren of any household 



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