1 янв 1890 г. - Closing of the Frontier
Описание:
Frederick Jackson Turner and the frontier. A year after the Oklahoma Land Rush, the director of the U.S. Census Bureau announced that the frontier was closed. The 1890 census had shown that a frontier line, a point beyond which the population density was less than two persons per square mile, no longer existed.Добавлено на ленту времени:
Дата:
1 янв 1890 г.
Сейчас
~ 134 г назад
