[John Leonard Riddell, biographical materials]. 1946-

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[John Leonard Riddell, biographical materials]. 1946-

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Riddell, John Leonard, 1807-1867

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John Leonard Riddell, physician, biologist, and inventor, was born in Leyden, Mass., Feb. 20, 1807. In 1835 he was appointed professor of chemistry and botany at Cincinnati Medical College, and published his "Synopsis of the Flora of the Western States". He received an M.D. degree in 1836 from Cincinnati Medical College. He then went to New Orleans as professor of chemistry in the Medical College of Louisiana, where he worked throughout the rest of his life. In New Orleans he also became melter ...