Berry, Imitation ni White Rots. 341 



NO. 3 IMITATING NO. i. 



No. 3 was put in the cage by himself for ten minutes. He saw 

 and apparently smelled the food but did not make any ver\' 

 strenuous effort to get out. 



\o. I \o. J follows J\'o. J 



Date gets out Xo. J sees No. I out gets out Time 



Nov. 15 2 2 2 — — 



Totals 222 I 



After following No. i out the first time, No. 3 was put back by 

 himself for five minutes. During these five minutes he found the 

 door and raised it a little, but then gave up and did nothing dur- 

 ing the last two minutes. Previous to this experiment I had been 

 allowing the rats to remam in the cage from one to five mmutes 

 when put back after following the leader out. The point was to 

 let them try until they gave up, which was generally not longer 

 than two or three minutes. 



NO. 4 IMITATING NO. i. 



No. 4 was put in the box by himself for eighteen minutes. At 

 first he made vigorous efforts to get out, but gave up before the end 

 of the time. 



No. I No. 4 follows No. 4 



Date gets out No. 4 sees No. I out gets out Time 



Nov. 15 3 3 I (3) — — 



Nov. 16 2 2 I (2) — — 



Totals 5 5^ 



No. 4 was left in the cage five minutes each time after No. i got 

 out. After he had followed No. i out the first time he tried the 

 door when put back and raised it partly. The trouble seemed to 

 be that he was not hungry enough to make any great effort to get 

 out. 



