Westphal—Hössli—Casper—Ulrichs—Krafft-Ebing—Moll—Féré—Kiernan—Lydston—Raffalovich—Edward Carpenter—Hirschfeld.

[CHAPTER III.—SEXUAL INVERSION IN MEN.]

Relatively Undifferentiated State of the Sexual Impulse in Early Life—The Freudian View—Homosexuality in Schools—The Question of Acquired Homosexuality—Latent Inversion—Retarded Inversion—Bisexuality—The Question of the Invert's Truthfulness—Histories.

[CHAPTER IV.—SEXUAL INVERSION IN WOMEN.]

Prevalence of Sexual Inversion Among Women—Among Women of Ability—Among the Lower Races—Temporary Homosexuality in Schools, etc.—Histories—Physical and Psychic Characteristics of Inverted Women—The Modern Development of Homosexuality Among Women.

[CHAPTER V.—THE NATURE OF SEXUAL INVERSION.]

Analysis of Histories—Race—Heredity—General Health—First Appearance of Homosexual Impulse—Sexual Precocity and Hyperesthesia—Suggestion and Other Exciting Causes of Inversion—Masturbation—Attitude Toward Women—Erotic Dreams—Methods of Sexual Relationship—Pseudo-sexual Attraction—Physical Sexual Abnormalities—Artistic and Other Aptitudes—Moral Attitude of the Invert.

[CHAPTER VI.—THE THEORY OF SEXUAL INVERSION.]

What is Sexual Inversion?—Causes of Diverging Views—The Theory of Suggestion Unworkable—Importance of the Congenital Element in Inversion—The Freudian Theory—Embryonic Hermaphroditism as a Key to Inversion—Inversion as a Variation or "Sport"—Comparison with Color-blindness, Color-hearing, and Similar Abnormalities—What is an Abnormality?—Not Necessarily a Disease—Relation of Inversion to Degeneration—Exciting Causes of Inversion—Not Operative in the Absence of Predisposition.

[CHAPTER VII.—CONCLUSIONS.]