CONTENTS. 



INTRODUCTION. 



PHYSIOLOGICAL HEREDITY 



PART FIRST. 

 THE FACTS. 



CHAPTER I. 

 HEREDITY OF INSTINCTS. 



I. Heredity of Natural Instincts ... ... ... ..; 13 



II. Heredity of Acquired Instincts ... ... ... ... 16 



III. What is Instinct? ... ... ... ... ... ... 19 



IV. Origin of Instincts : are they Hereditary Habit ? ... ... 26 



CHAPTER II. 



HEREDITY OF THE SENSORIAL QUALITIES. 



I. Heredity of Touch ... ... ... ... ... 36 



II. Heredity of Sight ... ... ... ... ... 38 



III. Heredity of Hearing ... ... ... ... ... 41 



IV. Heredity of Smell and Taste ... ... ... ... 43 



