view of sex basis, 86.

Girls, pre-pubescent and pubescent instruction to be given to, 96-98;
teaching phases for, 154-67;
stability of nervous system, 154-58;
menstruation and menstrual pain, 159-61;
clothing of, 161, 162;
in industry, 162, 163;
housing of unmarried, 163, 164;
instruction to be given on reproduction, 164-67.

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;