The Mind of a Monkey 257 



turning the box over and over until she became dis- 

 couraged. I recalled her to the task by tapping on 

 the box, but evoked only feeble efforts. When I 

 opened and closed the door Lizzie observed me and 

 went at once to the door and got the apple. Then 

 I replaced the apple and closed the door and put the 

 box in another position. Lizzie attacked the box 

 in various places and then desisted. Soon she looked 

 at the box, went to it as if an idea struck her, and 

 tried to pull the door open by using hands and teeth ; 

 finally, after some tugging, she succeeded. After a 

 few more successful trials the door was fastened with 

 the hook. Lizzie attacked the door with hands and 

 teeth and turned the box over and over and often 

 tried to get the apple through the wire. A renewed 

 attack on the hook enabled her to get the door open 

 and get the apple. The next trial on the succeeding 

 day was followed by much the same method of at- 

 tack. After biting at the hinges and various other 

 parts of the box Lizzie loosened the hook and opened 

 the door. 



Not to weary the reader with the recital of Liz- 

 zie's misdirected efforts and slow progress, it may 

 be said that she gradually came to concentrate her 

 efforts on the door, but even after thirty trials she 

 would bite at the hinges and edges of the door, 

 and not infrequently she would turn the box over 

 and bite at the wire netting. In all of her efforts 

 at the hook she never learned to pull it to one side. 

 She simply tugged at it this way and that with her 



