"De los Matrimonios entre Parientes," Memorias de la Real Academia de Ciencias Morales y Políticas, vol. ii, pp. 369-400.

[13]

See article in Cincinnati Gazette, Jan. 22, 1895.

[14]

Statistics and Sociology, p. 112.

[15]

Effect of Consanguinity upon the Organs of Special Sense, p. 4.