CONTENTS 



CHAP. 



I. Introductory 



II. The Modes of Keproduction 



III. The Facts and Function of Sex 



IV. The Biometric Study of Heredity . 

 V. The Facts and Laws of Variation . 



VI. The Origin of Variations . 



VII. Mendelism 



VIII. Reversion 



IX. The Theories op Heredity . 



X. The Inheritance of Acquirements . 



XI. The Relative Importance of Heredity 

 Environment 



XII. Heredity and " Physical Degeneration " 



XIII. Heredity and Disease .... 



XIV. Mental Heredity 



Subject Index 



Index to Names 



AND 



PACK 



9 

 17 

 24 

 39 

 47 

 49 

 60 

 64 

 68 

 71 



84 

 92 

 103 

 115 

 117 

 118 



vU 



