Editing 1789 in science (section)

==Chemistry==
* [[Antoine Lavoisier]]'s ''[[Traité Élémentaire de Chimie|Traité élémentaire de chimie]]'' presents a unified view of new theories of chemistry, containing a clear statement of the law of [[conservation of mass]], defining the nature of [[Chemical element|elements]] and denying the existence of [[phlogiston]]. He also helps establish the [[scientific journal]] ''[[Annales de chimie et de physique|Annales de chimie]]'' which will still be published into the 21st century.
* German chemist [[Martin Heinrich Klaproth]] discovers the element [[Uranium]] while studying the mineral [[pitchblende]].