Editing 1809 in science (section)

==Technology==
* February 11 – [[Robert Fulton]] [[patent]]s the [[steamboat]] in the [[United States]].<ref>{{cite web|url=http://www.thinkfinity.org/2011-02-11_Fulton-patents-steamboat|title=Robert Fulton patented the steamboat in 1809|work=Thinkfinity|publisher=Verizon|accessdate=2011-04-15|archive-url=https://archive.today/20110724093727/http://www.thinkfinity.org/2011-02-11_Fulton-patents-steamboat|archive-date=2011-07-24|url-status=dead}}</ref><ref>{{cite web|url=http://www.todayinsci.com/F/Fulton_Robert/FultonPatents.htm|title=The Fulton Patents|work=Today in Science History|accessdate=2011-04-15}}</ref>
* May 5 – [[Mary Kies]] becomes one of the first women granted a U.S. patent, for a technique of weaving [[straw hat]]s with [[silk]] and [[Yarn|thread]].<ref>{{cite web|url=http://inventors.about.com/library/inventors/blkeis.htm|archive-url=https://archive.today/20120710071938/http://inventors.about.com/library/inventors/blkeis.htm|url-status=dead|archive-date=July 10, 2012|title=Mary Kies - Patenting Pioneer|accessdate=2007-05-14|work=About.com}}</ref>
* [[Samuel Thomas von Sömmerring]] invents a water [[voltameter]] [[electrical telegraph]].<ref name=tt/>
* [[William Hyde Wollaston]] invents the reflecting [[goniometer]].