THE PSYCHIC DEVELOPMENT OF YOUNG ANIMALS 133 
One was noticed watching with an intelligent ex- 
pression the movements made in connection with 
photographic apparatus within 5 feet of them. 
When the lip-call is uttered they wag the tail like 
older dogs. 
32nd day.—By lamplight a puppy follows by his 
eyes a straw moved before him at 3 to 4 inches 
distance. He also seems much interested in the shadow 
of my hand on the wall. 
On holding the coal-oil lamp near them, all licked at 
the glass cistern containing oil (smell). One or two 
touched the chimney with the nose or tongue, but the 
majority turned away when it was near the nose, while 
neither of those that had touched the chimney went 
near it again. 
They show sociability with human beings, and a 
tendency to play with them. 
They become very quiet and attentive When they 
hear certain kinds of sounds, which is prolonged if the 
sound continues. 
337d day.—When a straw is rapidly moved before 
them they snap at it to catch it. 
Upon changing the straw bedding in their pen they 
rub about in it much as old dogs, evidently well pleased. 
There is a very distinct advance in the ability to 
lap milk. 
Now, when put on the covered floor of the kennel, 
with its covering of sawdust, they do not manifest 
uneasiness as before, but walk about and play. One 
is seen to run at a slow rate, with his tail up, and 
several make quick starts forward and backward. On 
giving the lip-call, and snapping my fingers, one, a few 
feet distant, ran towards me. 
They now watch what is being done near them some- 
what attentively. 
A slight tap on some boards above them causes them 
