X PREFACE 



"Animal Intelligence and how to Study It," 

 appeared, in the first instance, in The Sherbrooke 

 Examiner; " Comparative Psychology," etc., in Appletons' 

 Popular Science Monthly ; " Psychology and Comparative 

 Psychology," in Science ; " Squirrels : their Habits and 

 Intelligence," etc., and all the papers following, as far 

 as page 276, in the Transactions, Royal Society of 

 Canada ; the " Discussion on Instinct," etc., in Science. 



I desire to offer my thanks to the Editors and 

 Publishers of the before-mentioned periodicals for 

 their courtesy in readily assenting to re-publication 

 of the papers referred to, as also to those contributors 

 who have kindly allowed me to embody their views in 

 this book. 



As the discussions in Part IV. are printed just as 

 they originally appeared, perhaps it may be well to 

 state that Professor Morgan's views on the subjects 

 under consideration may be found fully developed 

 in his "Habit and Instinct," and Professor J. Mark 

 Baldwin's in papers that have appeared in the 

 American Naturalist, Science, and the Psychological 

 Review, though such contributions cover a wider 

 field than that traversed in the discussions to which 

 reference is now made. 



THE AUTHOR 



