366 Journal of Comparative Neurology and Psychology. 



lie went to X, where he perched for some time. Going to the floor he walked 

 about and then looked up at the chute ; he tried to jump to it from the floor, 

 but, though he touched the rung with his hand, he was not able to hold. 

 He then walked about the floor and climbetl the front of the cage, walked 

 along the brace and leaning over to the chute, pulled it as before. Going to 

 the floor, he tried to climb the corner post near the chute. Failing in this, 

 he jumped to the chute from the floor, holding with both hands. Pulling 

 himself up to the chute, he bit the rungs and then worked his way around 

 the chute biting at all the edges, but not turning his head down to the end 

 of the chute. Leaping to the front of the cage, he descended to the floor and 

 walked about. Once again he jumped for the chute, but failed to hold on. 

 He then walked about the cage and climbed to X, where he perched for 

 the remainder of the time. 



Second test. Conditions were the same as In the preceding test. The 

 record of No. 11 's seeing was as follows: 



Performance 1. No. 11 was looking at the experimenter and did not see. 



P. 2. No. 11 saw, though his attention was divided between the experimenter 

 and No. 4. 



P. 3 to P. 5. No. 11 saw fairly well, but did not threaten as on the day before. 



P. 6. No. 11 saw perfectly. 



No. 4 was now removed and No. 11 was released in the cage. He found a 

 seed on the floor and ate it. He jumped to the chute from the floor, but 

 could not hold. Sitting down beneath the chute he looked up at it and then 

 walked about the floor looking for food. He climbed to X, but returned 

 to the floor after a minute, going to the door, where he tried to get out. 

 Failing to open it, he went to the wire end of the cage and sat on the 

 floor. He tried the door again and then climbed to X, but after one minute 

 came to the floor and sat down. Turning toward the chute, he jumped for it, 

 and catching hold, drew himself up to the chute. For some time he sat 

 on the rung; then he bit his way around the chute. He then shook the 

 chute so hard that the iron attached to the string on the inside rattled. He 

 was then quiet, looking about the cage and at the sides and edges of the 

 chute. Twice more he shook the chute with such vigor that he all but tore 

 it from its fastening at the top of the cage. Becoming quiet, he sat 

 for a moment and then leaped to the front of the cage. He went to J and 

 perched for a moment ; he then went to the floor and sat near the wire end 

 of the cage. Time : 2.5 minutes. 



Third test. No. 13 had by this time learned to get food and he was used 

 as the imitatee since, in size and general behavior he was much more 

 like No. 11 than was No. 4. No. 11 was put into the observation-box and 

 the box was placed on the floor of the cage. No. 13 was not at first 

 inclined to work, but moved all about the cage. He finally went to the 

 chute and hunted along the top of the cage for roaches. Several times 

 ho jumped from the wire side of the cage to the chute and back to the wire. 



Performance 1. At last he went to the chute slowly and pulled the string, 

 getting food. No. 11 saw every movement perfectly. No. 13 was suffering 

 from a fall he had gotten a short time before when fighting with No. 10. 



