8 



E. L. THORNDTKE. 



course of life. They mean simply the connection of a certain act 

 with a certain situation and resultant pleasure, and this general 

 type of association is found throughout the animal's life normally. 

 The muscular movements required are all such as might often be 

 required of the animal. And yet it will be noted that the acts re- 

 quired are nearly enough like the acts of the anecdotes to enable 

 one to compare the results of experiment by this method with 

 the work of the anecdote school. Finally, it may be noticed 

 that the method lends itself readily to experiments on imitation. 

 We may now start in with the description of the apparatus 

 and of the behavior of the animals.^ 



Description of Apparatus. 



The shape and general apparatus of the boxes which were 

 used for the cats is shown by the accompaning drawing of box 

 K. Unless special figures are given, it should be understood 



Fig. I. 



that each box is approximately 20 inches long by 15 broad by 

 12 high. Except where mention is made to the contrary, the 

 door was pulled open by a weight attached to a string which ran 

 over a pulley and was fastened to the door, just as soon as the 



'The experiments now to be described were for the most part made in the 

 Psychological Laboratory of Columbia University during the year 'gy-'gS, but a 

 tew oi them were made in connection with a general preliminary investigation 

 of animal psychology undertaken at Harvard University in the previous year. 



