TRIAL AND ERROR REACTIONS IN MAMMALS 



43 



Cats 



Cat I. Age, I year. Manx. This animal was reared in the 

 Harvard Psychological laboratory, and enjoyed the further 

 distinction of having been one of Doctor Berry's (4) subjects 

 in his studies of imitation. Although my apparatus has no 

 technical resemblance to that used by Doctor Berry, Cat i 

 explored it carefully, and for several trials persisted in her 

 efforts to claw at imaginary loops of string beyond the meshes 

 of the wire netting. Her close attention to the apparatus situa- 

 tion, and her remarkable intelligence (as compared with that 

 of common cats) was of much interest. 



Cat 2. Age, I year. Common house cat. Co-operated well. 



Cat 3. Age, I year. Same as Cat 2 except in sex. 



Cat 5. Age,' 56 days. Common cat. Co-operated well. 



Cat 7. Age, 70 days. Common cat. Timid and sluggish. 



Horse 

 Horse 2. Age, 8 years. Gelding of western breed. Carriage 

 horse. In view of the very poor showing made by this animal, 

 the stableman's belief in his " smartness " is of some interest. 

 On one occasion the writer was driving this horse at night, 

 over an unfamiliar network of roads. The horse was guided 

 in a wrong direction on the way home, and the writer became 

 quite disoriented. When the horse was given a loose rein he 



