[MILLS | PSYCHIC DEVELOPMENT OF YOUNG ANIMALS 215 
Under favourable conditions a mere trace of salt causes decided signs 
of disgust. 
When blistering fluid is held within 2 to 3 inches of the nose the 
puppy acts as if something unpleasant were in its mouth. 
The puppy winks occasionally, apparently spontaneously ; but wink- 
ing cannot be induced reflerly until the moving finger is approached so 
close to the eye as to almost touch the eye lashes. 
When the finger and thumb are moved as in snapping the fingers 
but without causing any noise, the puppy under observation turns its eyes: 
in the direction of the object, so that I have no doubt that a small object 
as a finger is distinguished at 3 to 4 inches and a larger one at about 2: 
feet. When the fingers are snapped in the ordinary way the head as well 
as the eyes are turned towards the exciting object, showing that vision 
and hearing are both stimulated effectively and together. 
Motor activity is still poorly developed. 
The coat—straight before, begins to show waviness. 
24th day.—To-day a puppy follows a fish-bone by smell and attempts 
to bite at it. 
25th day.—The appearance of the eyes show an advance over a few 
days ago. 
When the dam is brought within 6 to 8 feet of the puppies they seem 
to become aware of her presence by smell first of all, but when within a 
few feet of them they follow her with the eyes. 
There is a decided improvement in locomotion. 
The puppies now have all the upper incisors, the canines above and 
below, and two molars above and two below. 
Hearing is now very acute. A very feeble “hist.” when within a 
couple of feet causes movement of the ears, turning of the head and an 
expression of the face that indicates clearly that the puppy hears. 
A “hist ” of moderate intensity is heard readily at five feet. 
There is a tendency now when any object is placed before the pup- 
pies to growlor bark at it in a meaningless way, 
31st day.—To-day a slight sound caused a starting. The puppy 
(henceforth the only one) seems to have reached that period when hear- 
ing as a mere sensation is perfect, but the interpretation of sounds very 
imperfect, hence he is startled by many sounds that later produce no such 
effect. When a bone is placed within 4 inches of him, he sniffs at it and 
gets up to secure it. 
He makes the first attempts at gnawing a bone, using his paws to 
steady himself and once lifts a paw as if to place it on the bone but does 
not actually do so. 
The puppy now evidently sees small objects at some distance quite 
well. 
