THE PSYCHIC DEVELOPMENT OF YOUNG ANIMALS 127 
A bandage placed over the eyes soon causes sleep. 
Up to the present date the only nourishment received 
has been the mother’s milk, but to-day artificial feeding 
with cow’s milk diluted was added. The first attempts 
at lapping, though far from perfect, were fairly good— 
much better than the first attempts at swallowing fluid 
artificially introduced. It is noticed that they follow up 
slowly the spots where milk had been spilled. After 
each feeding they lick each other’s faces thoroughly.* 
19th day—The attendant reports the puppies as 
barking when he entered, as if at him. 
The lip-call, at a distance of 6 to 8 feet, causes 
them to prick up the ears quickly, which is soon 
followed by crying (expectancy of food possibly). 
One of the puppies scratches his own ear, 
Teeth are appearing that for some days could be 
felt beneath the gums. 
20th day.—Some get additional teeth. 
21st day.—Certain motor manifestations are worthy 
of special mention. 
Tails are wagged during play, and walking with tail 
held erect is seen for the first time. 
Several of them tried to get out of the pen. 
When the muzzle is held by the hand both hind 
legs were used in an attempt to remove it. (Will or 
reflex ? ) 
The hand moved before the face, as if to strike, 
causes winking. 
Now they seem to hear almost every sound made in 
their compartment of the kennel, which is about 
15 by 6 feet. 
22nd day.—Some have all the upper incisors, and in 
* During four days I was absent from home, but the puppies were 
carefully watched and notes taken by members of my family, who are 
familiar with the ways of dogs, and had frequently been with me 
when making my investigations on this and other litters of puppies. 
