Appleton's Cyclopedia of American Biography, edited by James
Grant Wilson, John Fiske and Stanley L. Klos. Six volumes, New York: D. Appleton
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DUPERREY, Louis lsidore, French naval officer, born in Paris, 21 October 1786; died there, 10 September 1865. He entered the French navy in 1802, was promoted 2d lieutenant, and sailed in 1817 for a voyage round the world in the corvette " Uranie," which vessel was wrecked on the Malouine islands, and Duperrey, picked up by an American vessel, returned to France, and was promoted to 1st lieutenant. In 1822 he received his commission as captain, and, in command of the corvette "La Coquille," sailed on a scientific expedition to the South American coasts and the Pacific Ocean, from which he returned on 24 March 1825. During that time he visited repeatedly the coasts of Chili and Peru, whence he sent to the navy department interesting reports upon the geology and institutions of those countries, and brought home many thousand zoological and botanical specimens. The observations of the pendulum taken during this voyage at many different points proved the flattening of the earth at the poles, and Duperrey also determined the position of the magnetic poles and the figure of the magnetic equator. He designed charts of the coast of South America that are valued, especially one showing the bifurcation of the current at the mouth of the Plate. Duperrey in 1836 was appointed officer of the Legion of Honor, and in 1842 a member of the French academy. He published "Voyage autour du Monde, etc., pendant les annees 1822'3'4'5" (Paris, 1826'30).
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