The Physician Often Consulted as to Advisability of Marriage--_Venereal Disease_ the Most Common Question-- _Tuberculosis_--Sexual Appetite of Tubercular Patients--Effect of Pregnancy Contraceptive Knowledge for Tubercular Wife-- _Heart Disease_--Serious Bar to Marriage--Influence of Sexual Intercourse--_Cancer_--Fear of Hereditary Transmission-- _Exophthalmic Goiter_--Most Frequent in Women--Simple Goiter-- Exceptions to Rule--_Obesity_--Family History--Obesity and Stoutness Not Synonymous--_Arteriosclerosis_--Danger in Sexual Act--_Gout_--Real Causes of Gout--_Mumps_--Parotid Glands and Sex Organs--Mumps and Sterility--Ooephoritis Due to Mumps-- _Hemophilia_--Hemophilic Sons May Marry--Hemophilic Daughters May Not Marry--_Anemia_--_Chlorosis_--_Epilepsy_--Hysteria--Symptoms of Hysteria--Marriage of Hysterical Women--_Alcoholism_--Effect on Offspring--Alcoholics and Impotence--_Feeblemindedness_--Evil Effects on Offspring--Sterilization of Feebleminded Only Preventive--_Insanity_--Functional Insanity--Organic Insanity-- Hereditary Transmissibility of Insanity--Fear Resulting in Insanity--Environment versus Heredity in Insanity--_Neurosis_-- _Neurasthenia_--_Psychasthenia_--_Neuropathy_--_Psychopathy_--Nervous Conditions and Genius--Sexual Impotence and Genius--_Drug Addiction_--External Causes--_Consanguineous Marriages_--When Consanguineous Marriages are Advisable--Offspring of Consanguineous Marriages--Homosexuality--Homosexuals Often Ignorant of Their Condition--Sexual Repression and Homosexuality--Sadism and Divorce--Masochism--Sexual Impotence and Marriage--Effect Upon the Wife--Frigidity--Marital Relations and Frigid Woman--Excessive Libido and Marriage--Excessive Demands Upon Wife--Satyriasis-- The Excessively Libidinous Wife--Nymphomania--Treatment--Harelip-- Myopia--Astigmatism--Premature Baldness--Criminality--Crime as Result of Environment--Legal and Moral Crime--Ancestral Criminality and Marriage--Rules of Heredity--Pauperism--Difference Between Pauperism and Poverty.