CONTENTS. 



INTRODUCTION; 5 



Part I. PRINCIPLES OF ANIMAL UNDERSTANDING. 



Chapter I. The Fundamental Basis of Intercourse 8 



Chapter II. Instinct and its Relation to the Subject II 



Chapter III. The Basis of Thought Transference 13 



Chapter IV. Emotion and its Relation to the Subject 19 



Chapter V. Emotional Effects, continued Their Relation to Demon- 

 strative Expressions 20 



Chapter VI. Evolution of Sound-producing Organs and the Sucept- 



ibility/of Hearing Faculties 24 



Chapter VII. On Habit and Inheritance Their Relation to the 



Subject 33 



Part II. THE VARIOUS FORMS A OF EXPRESSION. 



Chapter VIII. Rational Development of Modes of Expression, by 



Reasoning from Intuitive^Ideas .. 38 



Chapter IX. On Gestures Vocal Sounds and Signs 47 



Chapter X. Miscellaneous Forms and Conclusion 55 



