116 ANIMAL INTELLIGENCE 



My purpose may be stated about as follows : 



(1) To give a detailed history of the psychic develop- 

 ment up to a certain age of representatives of several 

 animal groups. 



(2) To compare groups and individuals. 



(3) To correlate the psychical and physical or, at 

 all events, to, make some attempt to connect, in time, 

 the psychic and physical development. 



The completion of this work will even, so far as 

 I am able to accomplish it, take a considerable time 

 yet, so that I shall be obliged, in the present paper, 

 to confine myself to one group of animals, viz. dogs, 

 of which I have made a study during the greater part 

 of my life, and more especially within the past ten 

 years, as regards their psychic nature and certain other 

 features. 



The present paper will be founded chiefly on the 

 notes or diary of three litters of puppies two of the 

 St Bernard and one of the Bedlington terrier breed. 



These histories, then, will concern, it will be observed, 

 only pure-bred dogs, as I have not as yet similar notes 

 on mongrels. As the dog is, after the monkey, more 

 like man psychically than any other animal, I hope 

 to make some comparisons with the development of 

 the young human being, though possibly not in this 

 paper. 



Inasmuch as the diary of the last litter of St Bernard 

 puppies studied is more complete, and was written in 

 the light of my past experience, I regard it as much the 

 most valuable. It will therefore be given first of all, as 

 written day by day, with only a few verbal alterations, 

 from which each reader may form his own independent 

 conclusions. 



This I purpose to follow by certain remarks. As my 

 work on the brain especially is not yet complete, the 

 physical correlation which has to do chiefly, of course 



