Berry, Imitation in White Rats. 



347 



raised until it was too high for him to grasp it with his teeth with- 

 out first seizing it with his forepaws and pulling it down. 



Results. — The rats were now tested to see if they could learn to 

 get out of the box without being taught. Not one succeeded. 

 The following table gives the time that each rat had for learning 

 to get out. 



Date 

 Dec. 21 



Dec. 22 



No. 3 

 30' 



60' 



No. 4 

 30' 



60' 



No. 5 



60' 



No. 6 



60' 



No. 7 



60' 



No. 8 



60' 



Totals 3* hrs. 3^ hrs. 3^ hrs. 3* hrs. 3* hrs. 



NO. 3 IMITATING NO. 2. 



T,i hrs. 



Time 



Jan. 3 



Jan. 4 



Jan. 5 



Totals 



25 



^5 



It is to be noted that in all the trials in Experiment VI, the rat 

 that is learning is put into the box by himself for a period ot five 

 minutes each time he follows the trained rat out. 



The first time that No. 2 pulled the knot No. 3 pulled it after 

 him and then followed him out. It was not until No. 3 had fol- 

 lowed No. 2 out four times that he showed any marked preference 

 for the knot-spot when put back. He would then go to the knot, 

 smell of it and run to the door. This he did two or three times, 

 but he made no effx>rt to seize the knot. The next time No. 2 was, 

 put in with him he ran back and forth from No. 2 to the door, 

 while No. 2 was pulling at the knot. 



