Haggerty, Imitation in Monkeys. 369 



at once. Then both auiiiials pretended tight toward another animal wliioh 

 was making a noise behind a curtain. 



I'erformance 1. No. 2 jumped to the cluite and jumped back to the wire 

 without pulling the string. Xo. (> saw. 



1'. 2. \o. 2 jumped to the chute and pulled the string. No. G saw No. 2 

 on the chute and saw food fall. 



P. 3. No. G saw as before. An empty shell bounced into the box and 

 No. G got it. 



I'. 4. No. G saw No. 2 on the chute, looked away, heard the sound of the 

 trap door, looked back and saw No. 2 at the end of the chute and the 

 food falling to the floor. No. 2 now jumped to the chute twice, but he 

 did not pull the string. No. 6 saw him jump. 



P. 5. No. 2 jumped to the chute, pulled the string and the food fell to 

 the floor. No. 2 now jumped to the chute and jumped back to the wire. 

 No. 6 saw nothing No. 2 did. 



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



No. 2 was now taken out. No. 6 was released from the observation-box. 

 He climbed the cage at the front and reaching over to the chute pushed a 

 hand up inside. He could not reach the string. This occurred only 30 seconds 

 from time of release. He then went down to the floor. 



Immediately, he climbed the wire opposite the chute, jumped to it, threw 

 his head and shoulders down, reached up inside and pulled at the string, 

 but, though he gave what seemed a strong pull, it was not sufficient to 

 open the trap door. He raised his body up, but at once bent down again 

 and looked up the chute. He then leaped to the floor. All this happened 

 within two minutes from the time of his release from the observation-box. 



Four minutes later he repeated the entire performance, and then dropi^ed 

 to the floor. Four minutes later he leaped to the chute, but did not go to 

 the end of it. He explored the top of the cage instead, leaped back to the 

 wire, and went down to the floor. He did not seem as vigorous as usual. 



Three minutes later, he jumped to the chute and in attempting to get in 

 position at the bottom of the chute, lost his hold and dropped to the floor. 



This he repeated five minutes later. He held with one hand to the rungs 

 on the chute and allowed his feet and body to hang below. Holding thus 

 with one hand, Jhe tried to put the other up the inside of the chute and 

 being unable to hold himself longer dropped to the floor. 



Five minutes later he jumped to the chute and pulled the string, but not 

 hard enough to get the food. 



Second test. Conditions were the same as in the previous test. No. 2 

 was now more active and worked rapidly. 



Performance 1 to P. 2. No. 6 saw No. 2 jump to the chute, then looked 

 away, heard the rattle at the chute and looked back to see No. 2 at the 

 end of the chute and food falling to the floor. 



Six times more No. 2 operated the chute. No. 6 saw the entire perform- 

 ance each time but one ; this one he saw in part. 



When No. 2 was out No. 6 found a grain of food on the floor of the 

 cage and ate it. He then climbed the wire, jumped to the chute, and swing- 



