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 first 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 hearing 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. 



