1806 in science

	… 1796; 1797; 1798; 1799; 1800; 1801; 1802; ; 1803; 1804; 1805; 1806; 1807; 1808; 1809; ; 1810; 1811; 1812; 1813; 1814; 1815; 1816 …;
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The year 1806 in science and technology involved some significant events, listed below.

Biology

Publication begins in London of the Flora Graeca collected by John Sibthorp.^[1]^[2]
Pierre André Latreille begins publication in France of Genera crustaceorum et insectorum, secundum ordinem naturalem ut familias disposita.

November 20 – Humphry Davy presents the results of his researches in the electrolysis of water to the Royal Society of London.
Louis Nicolas Vauquelin and Pierre Jean Robiquet isolate asparagine in crystalline form from asparagus juice in France, the first amino acid identified.

Jean-Robert Argand introduces the Argand diagram.^[5]
Adrien-Marie Legendre gives the first published application of the method of least squares, in a supplement to his Nouvelles méthodes pour la détermination des orbites des comètes.^[5]^[6]

John Bell concludes publication of The Principles of Surgery in two volumes (1801–06). Its treatment of arterial surgery in particular ranks him as a founder of vascular surgery.^[7] His brother Charles Bell publishes Essays on The Anatomy of Expression in Painting.

January 14 – Matthew Fontaine Maury, American oceanographer (died 1873)
February 14 – Joseph-François Malgaigne, French surgeon (died 1865)
February 18 – Eduard Heis, German mathematician and astronomer (died 1877)
April 9 – Isambard Kingdom Brunel, British civil engineer (died 1859)
June 12 – John A. Roebling, German American bridge engineer (died 1869)
June 27 – Augustus De Morgan, British logician (died 1871)
November 21 – Alexander Henry Haliday, Irish entomologist (died 1870)
December 11
- Otto Wilhelm Hermann von Abich, German geologist (died 1886)
- Alfred Swaine Taylor, English toxicologist, "father of British forensic medicine" (died 1880)
Luther V. Bell, American psychiatric physician (died 1862)

c. January?? – Mungo Park, Scottish explorer of West Africa (born 1771)
April 5 – Benjamin Bell, Scottish surgeon (born 1749)
June 23 – Mathurin Jacques Brisson, French zoologist (born 1723)
August 3 – Michel Adanson, French botanist (born 1727)
August 23 – Charles-Augustin de Coulomb, French physicist (born 1736)
October 9 – Benjamin Banneker, African-American astronomer and surveyor (born 1731)

^ Harris, Stephen (2007). The Magnificent Flora Graeca: How the Mediterranean Came to the English Garden. Oxford: Bodleian Library. ISBN 978-1-85124-306-8.
^ Lack, H. Walter; Mabberley, David (1998). The Flora Graeca Story: Sibthorp, Bauer, and Hawkins in the Levant. Oxford University Press. ISBN 0-19-854897-4.
^ Mawar, Granville (1999). Ahab's Trade: The Saga of South Seas Whaling. New York: St. Martin's Press. ISBN 0-312-22809-0.
^ Jones, A. G. E. (1970). "Captain Abraham Bristow and the Auckland Islands". Notes and Queries. 17 (10): 369–371. doi:10.1093/nq/17-10-369.
^ ^a ^b Crilly, Tony (2007). 50 Mathematical Ideas you really need to know. London: Quercus. ISBN 978-1-84724-008-8.
^ Itard, Jean (2008). "Legendre, Adrien-Marie". Complete Dictionary of Scientific Biography. New York. Retrieved 2012-01-23.{{cite encyclopedia}}: CS1 maint: location missing publisher (link)
^ Baston, K. Grudzien (2004). "Bell, John (1763–1820)". Oxford Dictionary of National Biography (online ed.). Oxford University Press. doi:10.1093/ref:odnb/2013. Retrieved 2011-04-06. (Subscription or UK public library membership required.)
^ Penguin Pocket On This Day. Penguin Reference Library. 2006. ISBN 0-14-102715-0.
^ "Copley Medal | British scientific award". Encyclopedia Britannica. Retrieved 21 July 2020.