CONTENTS 



CHAPTER PAGE 



I. INTRODUCTION - - - - - - I 



DEFINITION OF HEREDITY. 



II. THE GENERAL ASPECTS OF HEREDITY - - - 8 



INHERITANCE OF DIFFERENCES — MENDELISM — INHERIT- 

 ANCE OF RESEMBLANCES DEVELOPMENT. 



III. INHERITANCE OF PHYSICAL CHARACTERS IN MAN - 27 



y STATURE EYE COLOLfR SKIN COLOUR AND HAIR 



CHARACTERS ALBINISM LEFT-HANDEDNESS 



DIGITAL ABNORMALITIES VARIOUS ABNORMALI- 

 TIES. 



IV. INHERITANCE OF MENTAL CHARACTERS IN MAN - - I45 



FEEBLE-MINDEDNESS INSANITY CACOGENIC FAMI- 



LIES MUSICAL ABILITY HANDWRITING. 



V. THE LIMITS OF HEREDITY - - - - 1 75 



TWINS FINGER PRINTS INHERITANCE OF TWINNING 



LETHAL FACTORS. 



VI. SOCIAL AND WORLD ASPECTS OF EUGENICS - - 204 

 THE BASIS OF RACIAL AND TEMPERAMENTAL DIFFER- 

 ENCES THE RESULTS OF CROSSING BETWEEN 



RACES THE PROBLEMS OF POPULATION POPULA- 

 TION AND QUALITY. 



LIST OF GENERAL WORKS BEARING ON EUGENICS - - 252 



BIBLIOGRAPHY OF PAPERS CITED IN THE TEXT - -254 



INDEX - - - - - - - 273 



