THE PSYCHIC DEVELOPMENT OF YOUNG ANIMALS 123 



Wth day. Can discover little advance in vision. 

 The eyes are still more fully open. 



If the puppies hear at all it is only in the faintest 

 way. 



As the dam stands close beside the pen, when the 

 puppies lie drowsing, they soon begin to move the 

 muscles of the face, raise their heads, sniff here and 

 there, like a hunting dog catching scent of game, and 

 feel about, as it were, for the object giving the scent. 

 Presently they make, almost simultaneously, quick 

 movements as if to reach some object. I am convinced 

 that all this is from smell and not vision, though it 

 would be difficult to prove absolutely that sight had 

 nothing to do with it. 



When the dam now sits on her haunches the puppies 

 manage to reach the teats. 



They will still suck the finger when put into the 

 mouth, but for a much shorter period. 



17 'th day. Playing more common. One began to 

 play with the foot of another, but soon changed to 

 sucking this part. 



Slight movements of the tail are noticed during play 

 at times, and there is obvious increase in walking 

 power ; muscular co-ordinations of all kinds are better 

 made. 



When a beef bone is held within half an inch of the 

 nose when the puppies are asleep, the movements of 

 tongue, lips, etc., before referred to as evidence of 

 smell y take place. When awake, they give evidence 

 of smelling cold roast beef at 3 inches. 



When the dam stands at the end of the pen, some 

 2 feet from the puppies, that lie in about its centre, 

 they soon begin to move towards her, but not in a 

 straight line, as they would if they were guided solely 

 by sight. I am convinced that vision is very im- 

 perfect yet. 



