Berry, Imitation in White Rats. 



353 



NO. 4 IMITATING NO. 2. 



No. 4 

 gets out 



Time 



45 



35" 



90" 



45" 

 45" 

 15" 



Totals 



The first time that No. 2 pulled the wire No. 4 did not see him.. 

 The second time that No. 4 was put back after following No. 2 

 out, he smelled of the wire; the third time, he went to the wire and 

 smelled of it and then ran to the door. He did this five times dur- 

 ing his five minutes. Once he took hold of the wire with his fore- 

 paws but it was not until he had followed No. 2 out six times that 

 he actually pulled the wire when put back, and then he did not 

 pull it hard enough to open the door. 



NO. 6 IMITATING NO. 2. 



No. 6 

 gets out 



'5 

 5' 

 4" 



5" 



Totals 



No. 6 was first put in alone for fifteen minutes. During that 

 time he found the wire and pulled on it a little but not hard enough 

 to open the door. After pulling it he ran to the door. No. 6 



