of marriage, often amounting to seven
years, as from twenty-eight or twenty-nine to twenty-one or twenty-two,
under influences such as those mentioned above, is by no means
improbable. What would be its effect on productivity? It might be
expected to act in two ways:--

"(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 fuer Rassen-und-Gesellschafts-Biologie,
Nov.--Dec., 1909. See the Eugenics Review, July, 1910, p. 154.

[22] We decided to reprint the Report of that Conference, and a few
copies of the reprint are still obtainable.

[23] In his "Alcoholism." 1906.

[24] In the articles, "Racial Poisons: Alcohol," Eugenics Review, April,
1910, and "Professor Karl Pearson on Alcoholism and Offspring," British
Journal of Inebriety, Oct., 1910