Theoretically it may be sound and reasonable. in practice it is both unsound and unreasonable. because it can not be fully and clearly explained and because. grave doubt has been cast and must ever be cast upon its statistical bases. . The "nationalorigins" plan goes back for its base nearly 140 years to the census of 1790. a work which. admittedly. was unsatisfactorily executed. It goes back even further. to the population estimates of the early nineteenth century. and to add confusion to uncertainty. It gives weight to the immigration statistics beginning with 1830. the first year -when arrivals and departures were imperfectly enumerated. The board of experts which was set up under the Secretaries of State. Commerce. and Labor found in the United States under the census of 1920 a population of 105.700.000.
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immigration