THE PSYCHIC DEVELOPMENT OF YOUNG ANIMALS 211 
When in the house to-day he manifests shyness or 
appreciation of the strangeness of his surroundings. 
When his head is stroked he acts somewhat as a cat. 
Has begun a sort of playing with his dam. 
The social tendency is clearly evidenced. 
38th day—Has grown much. There is a great change 
in his attitude, manner of walking, etc. The puppy can 
now run fairly well. 
He has wonderful control of his ¢ai/, moving it when 
he approaches vigorously, as an old dog. 
For a week past his social tendencies towards human 
beings have been very marked. 
He is now provided with, practically, his full comple- 
ment of teeth. 
His eyes and general facial expression have also greatly 
changed. 
He is still readily startled by sounds. 
Heas yet reposesa good deal, which perhaps accounts 
in no small degree for his perfect health and excellent 
state of nutrition. 
He now sees small objects at a distance of 8 to 10 
feet at least. 
He is ready to eat almost anything given him. 
He can now dite accurately at any part of his 
body. 
39th day.—His weaning is begun regularly to-day. 
42nd day.—The following experiments were tried to- 
day : When a finger was put in his mouth he sucked 
it, but he would take no notice of a stick presented in 
the same way. Bread he tackled at once, using his back 
teeth to crush it. Meat he devoured eagerly. He had 
received no nourishment of any kind for one hour 
previous to these experiments. 
45th day.—Puppy is brought into my study. Shows 
little or no shyness aftera few moments. He is inclined 
to move about and use his nose in an investigating way. 
