THE PSYCHIC DEVELOPMENT OF YOUNG ANIMALS 23*7 



Very decided advance made in the position of the ears ; 

 they are more upright and are moved more readily. 



Can get no evidence of vision. 



Can get no reflex from the eyes till the cornea is 

 touched, and not very good then. 



About the hearing there can be no doubt whatever. 



\4th day. The ear carriage is still better. Eye re- 

 flexes feebly present. 



They are found out of the nest, and go to the mother 

 to suck when distant from her 2 or 3 inches. 



15th day. Since they strike against the side of the 

 nest (board) I am satisfied there is no distinct vision. 



They are able to reach the mother when 3 or 4 inches 

 distant. 



They seem to smell fresh, green food placed in the 

 larger box, with which their nest communicates. 



They do not seem to start quite so much when 

 touched as they did. 



The rapidity of general growth, and especially of the 

 hair, is impressive. 



There is an obvious advance in smell and taste. 



While not certain, I have a suspicion that they begin 

 to distinguish objects. They possibly take notice of 

 shadows. 



The first attempt at eating made to-day by nibbling 

 at grass put before them. 



They now begin to lope in the manner peculiar to 

 rabbits. 



They also begin to get up on the hind legs. 



They will by no means creep off any surface on which 

 they are placed. 



They now hear a soft whistle at from 4 to 6 feet, as 

 is evidenced by starting movements and ear movements 

 (reflex). 



The ears, however, do not move backward or forward 

 but laterally. 



