322 Journal of Comparative Neurology and Psychology. 



box carrots were placed, lightly covered with sawdust. A third 

 wire box was empty. 



Visual Blank Olfactory 



.25 mill. 



.23 mill. 1.25 min. 



Two wire cages made on the same plan as that first learned 

 but smaller were used. One was empty, the other had a visual 

 stimulus as before. The new boxes were first learned in the 

 ordinary way, by placing the food in one in an open dish. It 

 was first entered in 1.083 min., and the next time in .483 min. 

 The food was then covered with a glass dish and placed in the 

 other cage. The cages were about 1 3^ ft. apart, and exactly 

 alike. The guinea pig was placed 3 ft. away, facing them. Every 

 time the box with food was entered the guinea pig was given 

 a bite of food, and the food was then transferred to the second 

 cage. During the time of rearranging the apparatus the guinea 

 pig was always removed from the experimental cage. 



Visual stimulus. 

 Box with food. Box without food. 



.25 min. 

 .066 min. 



.399 mm. 



.25 mm. 

 .2 min. 



.313 mm. 

 .264 min. 



Feb. 6. 



.0S3 mill. 



.66 min. 



.264 min. 



.0S3 min. 



.066 min. 



[30] 



