l8 "Journal of Comparative Neurology and Psychology. 



March 8. Z played with a mouse but made no attempt to kill 

 it. But as soon as she saw X and M, who were now placed on the 

 outside of the cage, she seized the mouse and began to growl 

 fiercely. In seven minutes she had killed and eaten it. 



March 13. Z was put into the cage alone with a mouse. In 

 fifteen minutes she had killed and eaten it. 



Experiment 8. Getting Meat out of Bottle. 



Method. — In the opening occupied by the small trap-door in 

 Box II a pint milk bottle was firmly fastened. It was partly 

 filled with cloth so that the cat could easily reach meat which was 

 placed on top of the filling. 



Results. — M got the meat in four minutes. Y was successful 

 in ten minutes, but Z failed completely, although she worked hard 

 for twenty minutes. Her method was to stick her nose into the 

 bottle and then reach for the meat with her paws on the outside. 

 She also tried to get her nose and paw into the bottle at the same 

 time. 



X tried the same tactics as Z, except that she balanced herself 

 with her nose in the bottle, and then reached for the meat simul- 

 taneously with both paws. 



The next day Z again failed to get the meat in a trial of twenty 

 minutes. After she had ceased trying X was put in with her. 

 Although she went to work very energetically at the bottle she 

 did not succeed in getting the meat, but her efforts did arouse 

 Z to renewed eflPorts with the result that this time she was success- 

 ful. She was now removed and X was left in the box alone for 

 thirty-five minutes. She did not get the meat. On the following 

 three days X was tested alone for the following periods: 



Jan. 21 60' 



Jan. 22 20' 



Jan. 25 40' 



She did not once succeed in getting the meat. After X had been 

 in the box alone for forty minutes during the trial of January 23 

 I put Y in with her. She ivatched Y very closely as he reached into 

 the bottle and took out the six pieces of meat. After Y %vas removed 

 X went to the bottle and got the meat in less than tu'O minutes. At 

 first she used her old method, but finding that did not work she 

 went at it as Y had done. In further trials she got the meat as 

 skillfully as did X and Y. 



t<" 



