"(1) By shortening each generation by an amount equally proportionate to the diminution in age at which marriage occurs. Suppose the span of each generation to be shortened by one-sixth, so that six take the place of five, and that the productivity of each marriage is unaltered, it follows that one-sixth more children will be brought into the world during the same time, which is roughly equivalent to increasing the productivity of an unshortened generation by that amount.
"(2) By saving from certain barrenness the earlier part of the child-bearing period of the woman. Authorities differ so much as to the direct gain of fertility due to early marriage that it is dangerous to express an opinion. The large and thriving families that I have known were the offspring of mothers who married very young."
[14] An unavoidable delay in the publication of this book makes possible reference to Professor Ehrlich's synthetic compound of arsenic, known as "606," the anti-syphilitic potency of which will render even less excusable the cowardice and neglect against which the foregoing is a protest.
[15] This is a libel upon poor people everywhere. There has been some confusion between drink and poverty.
[16] "T. P.'s Weekly," Christmas Number, 1909.
[17] The first treatise on Infant Mortality in English, written by Sir George Newman at the present writer's request, and published in his New Library of Medicine in 1906, gives abundant and trustworthy information as to the initial incidence of this disproportionate mortality.
[18] "Socialism and the Family," Sixpenny Edition, p. 59.
[19] The address of this Union is 20, Copthall Avenue, London, E. C.
[20] "The primal physical functions of maternity."
[21] W. Claassen in the Archiv für Rassen-und-Gesellschafts-Biologie, Nov.—Dec., 1909. See the Eugenics Review, July, 1910, p. 154.