You see the title I have given to this paper is the depopulation of civilized nations. Probably it would be more proper to put it, the cessation of increase of population; for it is not so much the causes that depopulate, that I wish to speak of, as the causes which hinder the increase of the population,
It seems that the people of all civilized nations have in matters relating to the perpetuation of the species become subject to some influence, which as the nation becomes cultured prevents its increase. They seem to be approaching the same finale that characterizes a certain variety of butterfly which attains the perfect state and then dies.
In this country the subject does not receive the attention it merits, in fact it only attracts the notice of medical men, and then not as a condition which may confront them, but rather as a curiosity.