Cole, Intelligence of Raccoons. 259 



series twice, was puzzling to the animal and caused him to react to 

 the fourth red and to increase the number of "no reactions." 



Finally, every doubtful case was recorded against the animal; 

 thus if a raccoon started up just as red, after white and blue, 



came into view, it was counted as a response to blue unless the 

 experimenter saw the animal look at the red. Therefore, the 

 animals might now learn three new cards more quickly. Their pre- 

 vious training on the other hand made them very attentive to the 

 cards and was greatly in their favor. Untrained raccoons probably 

 could not do nearly so well, but these undoubtedly did a trifle bet- 



