THE PSYCHIC DEVELOPMENT OF YOUNG ANIMALS 135 
used for a similar test before, was placed among them. 
They soon tried to suck her teats, at which, on account 
of her smaller size, they could readily get. 
37th day.—Being a warm day the puppies feel the 
heat a good deal, le far apart from each other, and 
pant with tongues lolling out. 
At a distance of 10 feet, a mere word uttered in a 
low voice vouses one that is drowsing. 
Out of five tested only one sucked when the finger 
was introduced into the mouth. 
38th day.—They gave evidence of seeing me well, 
though I was standing at an outside door of the kennel, 
with two wire-mesh partitions between, and at a dis- 
tance of about 12 feet. 
Upon dangling a rope over their heads one seizes and 
pulls at it, but when doing the same with a bright 
chain they make off, showing fear. This was probably 
owing to the noise it made, the brightness, and, in one 
case, to the puppy having come in contact with it. 
The compartment in which they are kept is closed by 
a heavy wire-mesh door, through which every exit must 
be made. They crowd around this often now, and 
sometimes whine there when hungry. 
39th day.—High temperature ; puppies very uneasy. 
Seeing me at some little distance, one of them wags 
the tail like an old dog, showing its sociable and friendly 
nature. 
When one speaks they show pleasure by the tail, 
expression of face, etc. 
Two bones from cooked meat were placed on the 
straw of their pen, which now has walls only a few 
inches high, so that they can go in and out easily. 
One or two go towards the bones, followed by others ; 
one seizes a bone and walks out of the pen with tail 
up, much in the manner of an older dog. I suddenly 
removed the bone, when the puppy that had it sniffed 
