THE PSYCHIC DEVELOPMENT OF YOUNG ANIMALS 125 
of the 17th day, to which special attention is called. 
The observations and experiments were made at 
8.30 P.M. 
During sleep, growling, twitching of the muscles, 
sucking movements, licking, etc., are observed. 
The dam was placed near the puppies when asleep. 
There was licking of the lips, and general uneasiness, 
but no actual waking up till the dam stood near the 
centre of the pen where they were lying, when some 
stood up, and were evidently “feeling about for the 
body scent,” as sportsmen describe the action of their 
dogs when they detect the scent left by the bodies of 
game birds as opposed to that of the feet. 
Special tests were made of hearing. Clapping of 
the hands rouses them suddenly, but not in that un- 
questionable way seen later, for wafting the hand over 
them does the same, but less suddenly. 
Then low growling and low barking sounds are 
made, which seem to rouse them at tirst a little, but 
this was not demonstrative. 
Upon sounding the dog-whistle loudly there was a 
doubtful twitching of the ears, etc., but on repeating 
any of these tests the results were still more doubtful 
or wholly negative. 
To determine whether this was due to the concussion 
caused by clapping the hands, or to the actual aerial 
vibrations, the physical stimulus in hearing, I stamped 
on the floor where I stood when clapping the hands, 
causing more concussion than the clapping possibly 
could, but with no results. 
Finally, a thick cloth was interposed between the 
puppies and the hands, when the result was positive, 
showing conclusively that hearimg was now established 
on the 17th day. 
One of the puppies, upon having his back rubbed the 
wrong way of the hair, or rather both ways, growled, 
