- Humboldt, W. von, 61, 106
- Huneker, 393
- Hungary, birth-rate and death-rate in, 169
- Hutchinson, Woods, 186
- Hygiene, in medieval and modern times, 5;
- of sex, 244 et seq.
- Idiocy, 32 et seq.
- Ido, 373
- Illegitimacy, and feeble-mindedness, 37;
- in Germany, 97
- Imbecility, 32 et seq.
- Individualism, 3, 381 et seq.
- Industrialism, modern, 2
- Inebriety and feeble-mindedness, 41
- Infant consultations, 8
- Infantile mortality, 7, 13, 25, 138, 150 et seq.
- Initiation of youth, 234
- Insurance, national, 15
- International language of the future, 349 et seq.
- James, E.C., 123
- James, William, 195
- Japan, romantic love in, 115;
- birth-rate and death-rate in, 155;
- changed conditions in, 191, 322
- Jenks, E., 312, 316
- Johannsen, 152
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