Animal Intelligence 



string which ran over a pulley and was fastened to the door, 

 just as soon as the animal loosened the bolt or bar which 

 held it. Especial care was taken not to have the widest 

 openings between the bars at all near the lever, or wire 

 loop, or what not, which governed the bolt on the door. 



FIG. i. 



For the animal instinctively attacks the large openings first, 

 and if the mechanism which governs the opening of the door 

 is situated near one of them, the animal's task is rendered 

 easier. You do not then get the association-process so free 

 from the helping hand of instinct as you do if you make the 

 box without reference to the position of the mechanism to 

 be set up within it. These various mechanisms are so 

 simple that a verbal description will suffice in most cases. 

 The facts which the reader should note are the nature of the 

 movement which the cat had to make, the nature of the 

 object at which the movement was directed, and the posi- 

 tion of the object in the box. In some special cases atten- 



