CONTENTS. 



PAGE 



INTRODUCTORY I 



CHAP. 



I. HEREDITY IO 



II. VARIATIONS , . .24 



III. ACQUIRED CHARACTERS 33 



IV. REVERS.ON 44 



V. PREPOTENCY IN CHARACTERS 56 



VI. THE LAWS OF HEREDITY . . . . 67 



VII. HEREDITY IN INSANITY 8 1 



VIII. MARRIAGE AND INSANITY 96 



IX. MARRIAGE AND DRUNKENNESS Il6 



X. MARRIAGE AND EPILEPSY 130 



XL SYPHILIS 143 



XII. DEAF-MUTISM , , . l6l 



XIII. CANCER 175 



XIV. TUBERCULAR DISEASE IQ4 



XV. GOUT 214 



XVI. RHEUMATISM 228 



XVII. EARLY MARRIAGES I THEIR EFFECT UPON THE 



CHILDREN .... ... 243 



