Albert Allemann, Popular Science Monthly (1909)
“ If a modern city had to rely solely on its own natural increase, its population would steadily decline and finally shrink to an insignificant number. But if the disappearing portion of the American city population were constantly replenished by new immigration from Europe there would be no change in the actual conditions. However, the time is near at hand when the government of the United States will be compelled, for economic reasons, to close the gates to the great mass of poor immigrants from Europe. ”
