THE PSYCHIC DEVELOPMENT OF YOUNG ANIMALS 261 



A pigeon (the same one used before) is thrown into 

 the run where the hen and chicks are. It flies about a 

 little, and then alights. The chicks did not show the 

 least fear, etc., though the hen attacks the pigeon, 

 uttering a faint sound (danger signal) peculiar to fowls 

 'when a bird, as a hawk, flies over them. 



9th day. Feathers shooting out well. Differences in 

 colour very marked. 



~L4:th day. Tried the Black Owl pigeon, as before. 

 No special manifestations on the part of the chicks, nor 

 were there any when the other of the two pigeons before 

 tried was suddenly thrown into the run and fluttered 

 about. 



Remarks on the Diary of the Chicks. 



Previous to writing the notes on the chicks that were 

 the subject of the present paper, I had observed fowls, 

 young and old, from boyhood. 



The brilliant and suggestive observations and experi- 

 ments of Mr Douglas Spalding had fallen under my 

 eye, and the criticism of his work by so good an 

 observer as Prof. Preyer, determined me to make 

 some special independent observations. 



I had the impression that Spalding's statements 

 (Macmillan's Magazine, February 1873, referred to 

 also in Eomanes' " Mental Evolution ") were somewhat 

 overdone. 



My own observations confirm that suspicion, and 

 justify Preyer's criticisms (" The Mind of the Child "), 

 so that I am of opinion that Spalding's statements 

 require revision, though reliable in the main. 



Different chicks behave in a way sufficiently unlike 

 to warrant differences of opinion in detail, and one 



