34 



E. L. THORNDIKE. 



14. '» 



Fig. 12. 



The percentage of dogs succeeding in the various boxes is 

 given below, but is of no consequence, because so few were 

 tried, and because the motive, hunger, was not perhaps strong 

 enough, or equal in all cases. 



In AA 3 out of 3. 



«' BB o " "2 (that is, without previous experience of 



AA). 



Experiments with Chicks. 



The apparatus was as follows : 



P was simply a small pen arranged with two exits, one lead- 

 ing to the enclosure where were the other chicks and food, one 

 leading to another pen with no exit. The drawing (Fig. 13 

 on page 35) explains itself. A chick was placed at A and left 

 to find its way out. The walls were made of books stuck up 

 on end. 



Q^was a similar pen arranged so that the real exit was 

 harder to find. (See Fig. 14.) 



