370 'Journal of Comparative Neurology and Psychology. 



ing down to tlie end of the chute pulled the string, but failed to get food. 

 Then he swung down to the floor. Time : one minute. He tried again imme- 

 diately, but failed to hold and dropped to the floor. After six minutes he 

 jumped to the chute, touched the string with his hand, but did not pull it. 



Third test. Conditions were the same as in the previous test. 



Performance 1. No. 6 was playing and saw only in part. 



P. 2. No. 6 saw the entire performance, though not steadily. 



P. 3. No. 6 saw the entire performance. 



No. 6 now became angry at No. 2 and tried to get out of his box. No. 2 

 became frightened and ceased to work for some time. He lay stretched out 

 on the floor and after repeated efforts to get him to work he was taken 

 out, and No. 6 was released in the cage. 



No. 6 immediately climbed the front of the cage, leaped across to the 

 chute, swung with one hand to the rung, looked up the chute, pushed his 

 other hand up, lost his grip and fell to the floor. He repeated this within 

 two minutes. Twice again within two minutes he jumped to the chute. 

 Then he jumped to the chute, hung by one hand and looked up inside. He 

 looked at the chute often. He tried again to hang by one hand and look up 

 the chute, but dropped to the floor. He later jumped to the chute twice 

 and looked at the top of the cage. 



Fourth test, No, 6 imitating No, 4, Same conditions as before, except 

 that No. 4 was substituted for No. 2. 



No. 4 got food fourteen times. No. 6 saw the entire performance five 

 times ; seven times he saw the performance in part. 



After No. 4 was removed and No. 6 was released, the latter went at once 

 to the front, climbed the wire, jumped to the chute, held by his right hand 

 and touched the string. Then he changed to hold by his left hand and 

 thrust his right hand up to touch the string. After this he dropped to 

 the floor. He repeated this in less than two minutes, not changing hands 

 while on the chute, however. Five minutes later he leaped to the chute, 

 but did not swing down. He did not seem to "get the hang" of holding to 

 the chute with his feet as some of the other animals did. He gave no 

 further attention to the chute. 



Fifth test. The conditions were the same as in the preceding test. No. 

 6's record in seeing No. 4 was : 



Performance 1, No, 6 only saw food strike floor, 



P. 2 to P, 10. No. 6 saw the entire performance. 



P. 11. No. 6 saw in part. 



P. 12. No. 6 saw the entire performance. 



No. 4 was taken out and No. 6 was released. No. 6 found a seed on 

 the floor and ate it. After two minutes, No. 6 jumped to the chute, but 

 only examined a crack in the cage door. At the end of five minutes. No. 6 

 jumped to the chute and searched the inside of the chute with his hand, 

 but he did not pull the string. He then took his leisure about the cage till 

 the end of 10 minutes. 



