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19th Century

1850: The United States Census counts 8327 hemp plantations

1850 Census MapThe United States Census of 1850 was the seventh census of the United States. Conducted by the Census Office on June 1, 1850, it determined the resident population of the United States to be 23,191,876. The total population included 3,204,313 slaves.

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1851: Marijuana is listed in the U.S. Pharmacopoeia

In the 1820's several American medical societies created the first edition of the United States Pharmacopoeia (U.S.P.).

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