422 yournal of Comparative Neurology and Psychology. 



TABLE 30. 

 No. 5 Imitating No. 2 and No. 4. 



July 30 . 

 Total . 



10 

 35 



While No. 



2 was 

 present. 



E. Behavior of No. 6. 



Preliminary trials. — First trial. No. 6 was very frantic about the food 

 door. He rushed to where the plug had been in the Plug Experiment and 

 worked at the hole in the post. He lool^ed at the button and put his hands 

 on it, but made no effort to move it. Later he bit at it. He then gave 

 up his efforts. 



Second trial. On tlie second day No. 6 tried the door as before, but on 

 account of nails which had been driven in the edge he could not bite it. Once 

 lie went to the button and put his hands on it, and ten minutes later bit at 

 it in passing. 



Third trial. The third day there was the usual behavior about the cage. 

 No. 6 worked at the door for several minutes and once pulled at the screw 

 eye. Then he took his leisure about the cage. 



Fourth trial. On the fourth day No. 6 was very active at the door, biting 

 and pushing it. Once he grabbed the screw eye in passing. He then played 

 about the cage, going to the door frequently, but not working at it. 



Fifth trial. On the fifth day No. 6 tried the door a few times, but not 

 vigorously as on previous days. He bit at the button in passing. 



Imitation tests. — No. 6 imitating No. J/. — Both animals were in the cage 

 together in each of the following tests. 



First test. After the first few minutes No. 6 became afraid of No. 4 

 and kept away from her. In fifty-five perfomances No. 6 saw only three 

 times. The first time he saw No. 4 move the button, he followed and did the 

 same thing himself, but did not follow No. 4 to the door. When No. 4 

 was removed No. went at once to the food door and worked incessantly 

 and with great vigor for five minutes. Once during the time he went to the 



