Editing 1817 in science (section)

==Chemistry==
* Discovery of [[cadmium]] by [[Friedrich Stromeyer]].
* Discovery of [[lithium]] by [[Johann Arfvedson]].
* Discovery of [[selenium]] by [[Jöns Jakob Berzelius]].
* [[Pierre-Joseph Pelletier]] and [[Joseph Bienaimé Caventou]] isolate [[chlorophyll]]<ref>{{cite journal|last=Delépine|first=Marcel|title=Joseph Pelletier and Joseph Caventou|journal=[[Journal of Chemical Education]]|volume=28|issue=9|page=454|issn=0021-9584|doi=10.1021/ed028p454|date=September 1951|bibcode=1951JChEd..28..454D}}</ref> and [[emetine]].
* [[Leopold Gmelin]] begins publication of his ''Handbuch der theoretischen Chemie''.<ref>{{cite web|title=Leopold Gmelin|url=http://www.whonamedit.com/doctor.cfm/2219.html|work=[[Who Named It?|Whonamedit?]]|accessdate=2011-04-07}}</ref>