Answer:
Ohio's population tripled between 1820 and 1840 but only increased by about 50 percent from 1840 to 1860.
Although Ohio had ports of entry on Lake Erie, no passenger lists for ships are available. The majority of the immigrants arrived through eastern ports (New York, Boston, Philadelphia, Baltimore) and New Orleans. The library has records for each of these ports from 1820 to about 1920 or later. Philadelphia records start in 1800. Records of persons coming from Canada to the United States were not recorded until 1895. For records after 1895, see "Canadian Border Crossings, 1895-1954" in the the United States Emigration and Immigration.
Explanation:
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.
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Answer:
That Germany was researching nuclear weapons.
Explanation:
This letter was written by Leo Szilárd and signed by Albert Einstein, and sent to warn the President of US Franklin D. Rooselvelt in 1932, about Germany developing atomic bombs.
At the beginning of the 19th century, the treatment of the mentally ill was a distorted reinterpretation of Pinel's moral treatment and used physical and hygienic measures such as: showers, cold baths, whips, rotating machines and bleeds. The cure desired by Pinel was not achieved and these institutions gradually became places of deposit and exclusion, which was considered as a moral disease started to also have an organic conception according to the thought of several Pinel disciples, the treatment techniques used by those who defended organicist theories were the same as those employed by the followers of moral treatment, all with physiological explanations and justifications for their use since then prevail over organicist theories of mental illness resulting from the experimental discoveries of neurophysiology and pathological anatomy.
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