1840); Robert Dale Owen, "Marriage and Placement," in _Free Inquirer_, May 28 (New York, 1831); Pearson, _Ethic of Free Thought_ (London, 1888); Besant, _Marriage; As It Was, As It Is, and As It Should Be_; Gronlund, _The Co-operative Commonwealth_ (3d ed., London, 1891); Morris and Bax, _Socialism_ (London and New York, 1893); Carpenter, _Love's Coming of Age_; Stürmer, _Moderner Eheschacher_ (Leipzig, 1894); Proudhon, _Amour et mariage_ (Brussels and Leipzig, n. d.); and Bebel, _Die Frau und der Sozialismus_ (31st ed., Stuttgart, 1900), whose book is discussed by Oettingen, _Zur Theorie und Praxis des Heiratens_ (Leipzig, n. d.). See also Oettingen's _Obligatorische und fakultative Civilehe nach den Ergebnissen der Moralstatistik_ (Leipzig, 1881); Coulon, _De la réforme du mariage_ (Paris, 1900); Kuhlenbeck, _Reform der Ehe_ (Leipzig, 1891); Ewart, _Die Emancipation in der Ehe_ (Hamburg and Leipzig, 1895); Vortmann, _Die Reform der Ehe_ (Zürich, 1894); Lacombe, _Le mariage libre_ (Paris, 1867); Löwenherz, _Prostitution oder Production, Eigentum oder Ehe_ (Neuwied, n. d.); especially the able and radical works of Caird, _The Morality of Marriage_ (London, 1897); Stetson, _Women and Economics_ (Boston, 1900); and Schreiner, "The Woman Question," in _Cosmopolitan_, XXVIII (Irvington, 1899); _idem_, "The Woman's Movement of Our Day," in _Harper's Bazar_, XXXVI (New York, 1902). Swedenborg's system is set forth in his _Conjugal Love and its Chaste Delights_ (new ed., London, 1862); it is summarized by Hayden, _Ten Chapters on Marriage_ (2d ed., Boston, 1863); and expounded by Mann, _Five Sermons on Marriage_ (New York, 1882). On questions of heredity and selection consult Nisbet, _Marriage and Heredity_ (London, 1890); Laurent, _Mariages consanguins et dégénérescences_ (Paris, 1895); Féré, _La famille névropathique_ (Paris, 1894); Strahan, _Marriage and Disease_ (London, 1892); Reibmayr, _Die Ehe Tuberculoser_ (Leipzig and Vienna, 1894); Fournier, _Syphilis und Ehe_ (Berlin, 1881); Stanley, "Artificial Selection and the Marriage Problem," in _Monist_, II (Chicago, 1891); _idem_, "Our Civilization and the Marriage Problem," in _Arena_, II (Boston, 1890); criticised by Wallace, "Human Selection," in _Fortnightly Review_, XLVIII (London, 1890); Wertheimer, "Homiculture," in _Nineteenth Century_, XXIV (London, 1898); and especially Wood, _Some Controlling Ideals of the Family Life of the Future_ (New York, 1902).