Girls’ high schools, 161.

Gonorrhea and the gonorrhea microbe, 33-39, 100, 146, 199.

Hall, G. Stanley, his view of sex basis, 86.

Holabird, William, 135.

Home, the, as recreation and social center, 78, 79.

Hotels, employment of girls in, 63.

Housing of unmarried girls, 163, 164.

Howell, Dr. William H., quoted on the sexual appetite, 31.

Hygiene. See Social emergency, Reproduction.

Ice-cream parlors, 19.

Ideals of sex education, 199-201.

Illinois State Senate, vice investigation made by, 61.

Immorality and wages, 16, 17, 50-62.

Industrial education for women, lack of, 48.

Industrial efficiency, connected with social hygiene problems, 3, 18.

Industrial stress, its bearing upon sexual hygiene and morals, 62-64.

Infection. See Venereal infection.

Instruction in sex hygiene and the physiology of reproduction, what,
    when, and by whom to be given, 3, 10, 25, 42-44, 90-102, 106, 110-122,
    142-49, 179-89, 191;
  mistakes in, serious, 9;
  list of subjects to be considered, 148, 149;
  conditions to be observed in giving, 149-52;
  for girls, 164-67.
  See Education, Educational phases, Teaching phases.

Instructors in sex relations, lack of competent, 3, 10, 11, 192.

Insurance, recommended, 67.

Intoxicating liquors and commercialized prostitution, 17.

Investigations into immorality and diseases, 196.

Kelley, Florence, quoted on department stores, 63.

Kingsley, Charles, quoted, 141.

Lectures, 7, 78, 192, 193.

Legislation and prostitution, 20, 21.

Living wage. See Wages.

Love, as controller of passion, 174-78.

Marriage, age of, and age of sexual maturity, discrepancy between,
    13, 27, 28.

Marriage laws, object of, 27.

Massachusetts Commission on Minimum Wage Boards, report of, 54-57.

Masturbation, 130-32, 145, 198.

Materials of sex education, summary, 197-99.

Medical phases of immorality, 15, 16, 32-44;
  statistics of venereal diseases in the United States, 32;
  the microbes of syphilis and gonorrhea, 36-39;
  infection of innocent persons, 39-41;
  possibility of recovery, 41;
  bibliography, 205.

Medicine, means of defense against social evils provided by, 2, 4.

Menstrual pain, 159-61.

Menstruation, 159-61.

Mental suffering among adolescents, 130, 131.

Methods of sex education, summary, 193-97.

Minimum wage, 67.

Ministers, not competent to give instruction in sex relations, 3.

Minneapolis, report on women’s wages in, 56, 59.

Moral and religious phases of the social emergency, 23, 168-89;
  bibliography, 212.