robust useful, self-supporting citizens."[819] [815] DIKE, "Some Aspects of the Divorce Question," _Princeton Rev._, March, 1884, 180. Compare ALLEN, "The New England Family," _New Englander_, March, 1882, 146 ff.; CREPAZ, _Die Gefahren der Frauen-Emancipation_, 24 ff. [816] KUCZYNSKI, "Fecundity of the Native and Foreign Born Pop. of Mass.," _Quart. Jour. of Economics_, XVI, 1-36; CRUM, "The Birth-Rate in Mass.," _ibid._, XI, 248-65; DUMONT, "Essai sur le natalité en Mass.," _Jour. de la soc. stat. de Paris_, XXXVIII (1897), 332-53, 385-95; XXXIX (1898), 64-99; MOLINARI, "Decline of the French Population," _Jour. of the Royal Stat. Soc._, LIII, 183-97; MAYO-SMITH, _Statistics and Sociology_, 67 ff.; USSHER, _Neo-Malthusianism_, 137-64; EDSON, "Women of Today," _North Am. Rev._, CLVII, 446 ff. [817] Sometime, it is to be hoped, society may seriously take in hand the problem of restraining the propagation of criminals, dependents, and the other unfit: see WARNER, _American Charities_, 132, 133. [818] WILLCOX, "A Study of Vital Statistics," in _Pol. Sci. Quart._, VIII, 76, 77; OGLE, "On Marriage-Rates and Marriage-Ages," _Jour. of the Royal Stat. Soc._, LIII, 272 ff.; KUCZYNSKI, "Fecundity of the Native and Foreign Born Pop. in Mass.," _Quart. Jour. of Economics_, XVI, 1-36; MAYO-SMITH, _Statistics and Sociology_, 103 ff., 124; CRUM, "The Marriage Rate in Mass.," _Pub. of Am. Stat. Assoc._, IV, 331 ff.; WALLACE, "Human Selection," _Fort. Rev._, XLVIII, 335 ff. [819] STRAHAN, _Marriage and Disease_, 245 ff., giving statistics. _Cf._ EDSON, "The Evils of Early Marriages," _North Am. Rev._, CLVIII, 230-34; USSHER, _Neo-Malthusianism_, 213 ff.; WALLACE, "Human Selection," _Fort. Rev._, XLVIII, 333 ff.; LEGOUVÉ, _Hist. morale des femmes_, 74-84.