The Mind of a Monkey 



249 



Then she tried to seize the board by one end and 

 pull it toward her, but as the board was a little too 

 heavy for her to move well in this manner, a nail 

 was driven in the middle of the end of the board 

 nearest the cage to serve as a sort of handle. When 



n 



B 



FIG. 11. Diagram of Lizzie's cage with the board B, on which 

 food was placed, n n, position of nails. 



board and apple were placed as before Lizzie 

 reached immediately for the nail, pulled the board 

 in and got the apple. A repetition of the same ex- 

 periment was followed at once by the same result. 

 During the third trial Lizzie attempted to seize the 

 board by the side and pushed it away out of reach. 

 When the board was replaced she pulled it by the 



