CONTENTS. 



Preface to the first edition iii 



'Preface to the second edition v 



Remarks of the translator vi 



Contents ix 



CHAPTER I. 



Popular or Scientific Animal Psychology i 



The mania of modern "Animal Intelligence." Wundt's opin- 

 ion of "Pseudo-Psychology." Fundamental principles of a 

 scientific animal psychology. 



CHAPTER II. 

 Instinct and Intelligence according to Modern Zoology... 12 



Its definitions of Instinct and Intelligence examined and 

 illustrated by examples. Darwin's views on animal intelligence. 

 Modern zoology mistakes complex sensitive representations for 

 intelligence. Examples prove that this notion of intelligence 

 is untenable. 



CHAPTER III. 

 What is Intelligence and what is Instinct? 23 



Intelligence and reason. Intelligence is the power of formal 

 conclusion. Instinct is a sensitive impulse to actions that are 

 unconsciously adaptive. Essential and unessential criteria of 

 instinct. The power of sensitive perception and its faculties. 

 Instinct is the adaptive disposition of the powers of sensitive 

 perception and appetite, and constitutes as such the principle 

 of the spontaneous actions of the animal. Senses and spirit. 



CHAPTER IV. 

 Examination of some objections 45 



Popular psychology strongly opposed to a critical analysis 

 of notions. Is Reimarus the originator of Modern Anima-1 

 Psychology? Reimarus and the Animal Psychology of Scho- 

 lastic Philosophy. Forel's Automatisms" and "Plastic Neu- 

 rozymic Activities." Other objections of Forel. A charm- 

 ing criminal romance of ants by an anonymous critic. H. E. 

 Ziegler and Modern Science. 



ix 



