428 'Journal of Comparative Neurology and Psychology. 



was tlieu moved farther away from L, and No. 5 went to L aud' got food. 

 No. 13 saw lier get it. He was very impatient aud tried repeatedly to get 

 out of the hox, working at the door and shaking tlie box vigorously. No. 5 

 again waited aud after some time went cautiously to 21c; she took it in her 

 hand, but did not pull with sufficient strength to drop the food. No. 13 saw 

 her do this. For some time No. 5 refused to work on the floor, but she 

 attempted to get to 2t several times. This she was prevented from doing. 

 Finally she became accustomed to the presence of No. 13 aud moved about the 

 floor freely. She then became very eager to get food. Within a few minutes 

 she had operated the meclianism seven times. The record for No. 13 was 

 as follows : 



Performance 1. No. 13 saw well. 

 I'. 2, P. 5, and P. 6. No. 13 did uot see. 



P. 3, P. 4, and P. 7. No. 13 saw and was eager to get out of his box. 

 If we count the times No. 5 pulled the string, but did not get food, No. 13 

 saw the performance Ave times, four of which lie saw entire aud one in part. 

 No. 5 was now removed from the cage and No. 13 was released. At once he 

 climbed the end of the cage to 2t and taking it in his teeth, he pulled it 

 several times. Then he went to the floor and walked about ; after some time 

 he went to L and got the food that had dropped when he pulled 2t. When the 

 food had been eaten he climl;ed to 2t and pulled the string with his teeth. 

 The dropping of the food made a noise, but No. 13 did not notice it. After 

 several more pulls he went down to X and sat there for a short time. Then 

 he went to the floor aud walked about, later going to L and discovering the 

 food. Stowing it in his cheeks he went up to X and ate it. When it was 

 gone he wanted to go up to 2t again, but was not allowed to do so. He then 

 perched at X, and looked about for some time. Going to the floor, he stopped 

 at L, looked in, took hold of 27.-. dropped it, looked at L again and walked 

 away. He climlied to A. and returned to the floor after a little while. He 

 took 2k in his hands, dropped it and looked into L. Then he carried 2Jc up 

 to X and played with it. 



Second test. The conditions were the same as before. No. 5 was not so 

 frightened and worked at once. The record of No. 13 was: 

 i'erformance 1. No. 13 saw very well. 

 P. 2, P. 5, P. G. No. 13 did not see. 

 P. 3 and P. 4. No. 13 saw well. 



P. 7 and P. 8. No. 13 saw No. 5 get food, but did uot see the pull. 

 P. 9. No. 13 saw, but did uot seem attentive. 



Of the nine times that No. 5 got food No. 13 saw the whole performance 

 four times and in part twice. No. 5 was then removed and No. 13 was 

 released. At once he went to L and got a grain of sunflower seed that 

 No. 5 had left, and carrying it up to X, ate it. He then wanted to go to 2t. 

 but was not allowed to do so. He went down to the floor and to L. merely 

 looked at it and passed on to the door. He returned to L at once. Searching 

 about he found another seed, which he carried up to X and ate. When the 

 food was gone he attempted to go up to 2t, but was prevented. He went to 

 the floor and walked about, going to L twice. Once he looked at 2Jc, took 



