Haggerty, Imitation in Monkeys. 



405 



screen. No. 5 seeined interesteil in it only when No. (> was present and worlving 

 at it. 



TABLE 20. 

 No. 5 Imitating No. 4 and No. 6. 



Date. 



July 6. 



July 6. 



July 7 



July 8. 



July 9. 



July 9 

 July 10 

 JulV 11 

 Juiy 11 

 July 14 

 July 15 

 July 31 

 Aug. 2 



Total 



Number of times 



No. 4 performed 



the act. 



Number of times 

 No. 5 saw. 



Number of times 

 No. .5 saw in part. 



Result. 



Time in 

 minutes. 



10 

 10 

 10 

 10 

 10 



No. 5 Imitating No. 6. 



5 



11 

 10 

 20 

 30 

 26 

 10 



147 



5 

 5 

 10 

 10 

 15 

 20 

 15 

 5 



106 



134 



E. Behavior of No. 2. 



Preliminary trials. — First trial. No. 2 was not active. He examined tlie 

 screen with his nose and hands and bit at the screw eye in the top of it. 



Second trial. On the second day No. 2 pushed the screen, but did not 

 lift it; later he climbed upon it and examined the top of it. This he 

 repeated twice. 



Third trial. The third day's behavior was similar to that of the previous 

 day. No. 2 pulled and gnawed at the screen and the screen frame. Part of 

 the time he worked vigorously. Most of the time, however, he was in other 

 parts of the cage. 



Fourth trial. On the fourth day No. 2 was more vigorous than ever. He 

 spent five minutes without intermission chewing at the bottom of the screen 

 frame. He then quit and looked at a hole in the door. He made another 

 brief examination of the top of the screen and went away. Several times he 

 returned and examined the screen, once lifting one corner of it by pulling 

 on the screw eye at the top. 



Fifth trial. No. 2 was active at the screen, pulling at the top and biting the 

 lower part of the frame. He made no progress, however. 



Imitation tests. — No. 2 imitating No. 4. — During all of these tests No. 2 

 and No. 4 were together in the experiment cage. 



