[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 Genése 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.