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1809 in science
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==Deaths== * May 17 β [[Leopold Auenbrugger]] (born [[1722 in science|1722]]), Austrian physician. * August 18 β [[Matthew Boulton]] (born [[1728 in science|1728]]), English mechanical engineer. * October 11 β [[Meriwether Lewis]] (born [[1774 in science|1774]]), American explorer. * December 16 β [[Antoine FranΓ§ois, comte de Fourcroy]] (born [[1755 in science|1755]]), French chemist. * December 29 β [[Thomas Barker (meteorologist)|Thomas Barker]] (born 1722), English meteorologist.
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