[106] Smith, Mary Roberts, "Statistics of College and Non-college Women," Quarterly Pubs. of the _American Statistical Assn._, VII, p. 1 ff., 1900. [107] "Statistics of Eminent Women," _Pop. Sci. Mo._, June, 1913. [108] "Marriage of College Women," _Century Magazine_, Oct., 1895. [109] Blumer, J. O., in _Journal of Heredity_, VIII, p. 217, May, 1917. [110] The statistics of this and the following middle west universities were presented by Paul Popenoe in the _Journal of Heredity_, VIII, pp. 43-45. [111] _Harvard Graduates' Magazine_, XXV, No. 97, pp. 25-34, September, 1916. [112] Popenoe, Paul, "Stanford's Marriage-Rate," _Journal of Heredity_, VIII, p. 170-173. [113] Banker, Howard J., "Co-education and Eugenics," _Journal of Heredity_, VIII, pp. 208-214, May, 1917. [114] _Eugenics: Twelve University Lectures_, p. 9, New York, 1914. [115] Cf. Gould, Miriam C., "The Psychological Influence upon Adolescent Girls of the Knowledge of Prostitution and Venereal Disease," _Social Hygiene_, Vol. II, pp. 191-207, April, 1916. This interesting and important study of the reactions of 50 girls reveals that present methods or indifference to the need of reasonable methods of teaching sex-hygiene are responsible for "a large percentage of harmful results, such as conditions bordering on neurasthenia, melancholia, pessimism and sex antagonism." [116] Gallichan, Walter M., _The Great Unmarried_, New York, 1916. [117] Sprague, Robert J., "Education and Race Suicide," _Journal of Heredity_, Vol. VI, pp. 158 ff., April, 1915. Many of the statistics of women's colleges, cited in the first part of this chapter, are from Dr. Sprague's paper. [118] Odin calculated that 16% of the eminent men of France had at least one relative who was in some way eminent; that 22% of the men of real talent had such relation; and that among the geniuses the percentage rose to 40. There are thus two chances out of five that a man of genius will have an eminent relative; for a man picked at random from the population the chance is one in several thousand. See Odin, A., _La Genese des Grands Hommes_, Vol. I, p. 432 and Vol. II, Tableau xii, Lausanne, 1895. [119] Crum, Frederick S., "The Decadence of the Native American Stock," _Quarterly Pubs. Am. Statistical Assn._, XIV, n. s. 107, pp. 215-223, Sept., 1914. [120] Kuczynski, R. R., _Quarterly Journ. of Economics_, Nov. 1901, and Feb., 1902. [121] Nearing, Scott, "The Younger Generation of American Genius," _The Scientific Monthly_, II, pp. 48-61, Jan., 1916. "Geographical Distribution of American Genius," _Popular Science Monthly_, II, August, 1914. [122] In the chapter on Sexual Selection it was shown that the Normal School girls who stood highest in their classes married earliest. This may seem a contradiction of the Wellesley marriage rates in this table. The explanation probably is that while mental superiority is itself attractive in a mate, there are interferences built up in the collegiate life.