Allen, Association in the Guinea Pig. 329 



custom it to being brought upstairs. As usual, the quickest 

 way seemed to be to associate the experience with food. On 

 Feb. 12 it was taken to the dark room at the usual feeding time 

 and put in the experimental cage. After having been left there 

 about half an hour it was returned to the guinea pig room and 

 fed lightly. 



Feb. 13. It was taken to the experimental cage, food having previously 

 been placed there. In 5 min. the food was found and was pulled to one side of 

 the cage to be eaten. 



Feb. 15. The food was put in a wire box, but was not found. The guinea 

 pig was now becoming tame, and behaved naturally when removed to the ex- 

 perimental room. Fright had disappeared. 



Feb. 16. The electric food-box was used with the door open. The food 

 was not visible in the dark, and the door was left open in order that the slight 

 grating of the hinges, the noise of the contact of the spring with the plate, and 

 the touch of the door itself might not frighten the timid animal. The time was 

 recorded from the moment of placing the guinea pig in the experimental cage 

 until the sound of pulling out the food was heard. (When the door to the box 

 was closed the appearance of the electric light gave a more accurate time limit.) 

 The food was found, seemingly accidentally, in 2.264 iT^iii. 

 Feb. 17. Animal very active. Food not found. 

 Feb. 18. Door to electric box open. Time .05 rain. 

 Door to electric box open. Time 25 min 



Door to electric box open. Time 1. 083 min. 

 Door to electric box open. Time 5.581 min.' 

 Feb. 22. Door open. Time 1.S5 min. 



, Feb. 24. Door open. Time 11. S8 min. 



Repeated. Time .1 min. 



Door closed. Time .43 min. 



Door closed. Time .35 min. 



Feb. 25. Door closed. Time 2.913 min. 



Door closed. Time .528 min. 



Door closed. Time .43 min. 



Feb. 26. Door closed. Time 4.726 min. 



Door closed. Time .7S3 min. 



Feb. 27. Rattling of windows in the wind frightened the guinea pig, and 

 therefore no reactions. 



Feb. 28. Door closed. Time .83 min. 



Time .89 min. 

 Time .25 min. 

 Time 1.363 min. 

 Time 1.783 min. 

 Time 1.783 min. 

 Time . 183 min. 

 Time 2.33 min. 

 ' This increase in time was probably due to two things; (a) not so hungry 



[37] 



