en, ignorant of sex, 204.

Circumcision, 139.

Coeducation, in sex-instruction, 109;
and sex adjustment, 80.

Continence, 160 ff., 176 ff.;
of women, 190 ff.

Contraception, and ethics, 219.

Control, of sex instincts, 18.

Criticisms, of sex-education, 203 ff.;
conclusions regarding, 226.

Curiosity, denied by Repplier and Taft, _q.v._

Dancing, 169 ff., 200.

Diseases, social or venereal, 37 ff.

Dress, of women, 174 ff., 200.

Education, as a solution, 19, 88;
coeducation, 80;
sex-differentiated, 82.

Eliot, C.W., 71.

Emissions, 149.

Ethics, and biology, 102;
and sex-hygiene, 61 ff;
of sex, 4.

Eugenics, 86 ff.;
aim of, 105;
and ethics, 103.

Europe, and sex problems, 59 ff.;
morality in, 59;
sex-hygiene in, 230.

Evolution, and vulgarity, 75.

Fiction, and sex tragedies, 127.

Foerster, 70.

Frankness, 206.

Friendships, of children, 136.

Fulton, J.S., 40.

Future, of sex-education, 234-237.

Genetics, 87.

Girls, special instruction, 151;
unprotected, 191.

Gonorrhea, _see_ Diseases.

Good, and evil, 215.

Hamilton, Cosmo, 208.

Hartley, C. Gasquoine, 82 ff.

Heredity, 87;
and sex-education, 104.

History, of sex-education, 227 ff.

Homes, and sex-instruction, 21.

Hunger, two kinds, 73.

Hygiene, and ethics, 210 ff.;
of sex, 1-4, 25.

Ideals, of manhood, 185;
of womanhood, 157;
of love and marriage, 159, 187.

Ignorance, 45, 50, 54;
of children, 12-14.

Illegitimacy, 52 ff., 59.

Immorality, 38;
danger in teaching, 67.

Instincts, sexual, 16-18.

Intellectualism, and sex, 83.

Kallikak family, 103.

Key, Ellen, 64, 79.

Knowledge, and will, 217.

Lectures, on sex-hygiene, 100.

Legislation, and social diseases, 47.

Literature, general list, 241 ff.;
for parents, 33;
on marriage, 79;
on diseases, 39;
on sex, 11;
on social evil, 52;
general and sex, 124 ff.;
general references, 238 ff.;
for young men, 161, 183;
for young women, 201;
radical sex, 193.

Marriage, 159, 187;
a sex problem, 71 ff.

Masturbation, 137 ff.

Maxwell, W.H., 221.

Men, as leaders in love, 188;
instruction for, 156 ff.

Misunderstanding, of sex, 5.

Monogamy, 59.

Morality, 58 ff.;
double standard, 42.

Morrow, P.A., 37, 70;
leader, 227.

Mothercraft, 155.

Mothers, and boys, 111;
first teachers, 111.

Mystery, and sex, 15.

Names, of sex organs,