36 WESLEY MILLS ON 



ffive negative results. It is impossible to introduce a small probe into the auditory canal, — 

 which attempt was made with the puppy under ether so as to avoid the shaking of the head 

 which might introduce fallacies and be a source of danger to the drum head of the ear. 



For this and other investigations that could not be well carried out at home, one of the 

 puppies was conveyed to the Physiological Laboratory of McGill University. The puppy 

 having sucked to its satisfaction was tucked up warmly in a basket and conveyed for 

 twenty minutes in a street car without the slightest signs of uneasiness. 



Whenever the puppy recovered the .least from the ether anœsthesia, it showed a ten- 

 dency to whine, cry out, move, etc. 



To-day there was vindoubted play witnessed, both j^aws and jaws being used, especially 

 the latter. The second subject participated to a less degree. There was no sucking of the 

 ear or other part of the body in this case as had often happened before when the mouth of 

 one canine casually came in contact with the ear, paw, etc., of another pupjjy. 



I'oth 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. Present^ 

 they make, almost simultaneously, quick movements as if to reach some object. I am con- 

 vinced that all this is from smell and not vision, though it would be difficult to prove abso- 

 lutely 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 linger when put into the mouth, but for a much shorter period. 



nth 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 in- 

 crease 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, take place. When 

 awake they give evidence of smelling bold roast beef at three inches. 



When the dam stands at the end of the pen, some two 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 imperfect yet. 



The ear-flaps have, for a couple of days, been turned forward instead of l)ackwar(l as at 

 liirth ; but tests for hearing give but uncertain indications as yet. 



By touching in a certain way either the outside of the flap of the ear or its inside and 

 adjacent parts, the seratchiny reflex is excited on the same side. Occasionally the puppy 

 attempts to get rid of the irritation by the use of the foreleg of the same side. 



Upon suddenly seizing one of them it yrowls. 



The loinking reflex is more readily obtained and the latent period is shorter. 



While the puppies may have some vague notion of the existence of objects by their eyes 

 no clear evidence of being able to see objects in the proper -sense of the term is to be 

 obtained , notwithstanding many attempts. 



For the first time they lick the finger without any attempt to suck when it is presented 

 to them. 



