Editing 1729 in science (section)

==Physics==
* [[Stephen Gray (scientist)|Stephen Gray]] discovers [[electrical conduction]].<ref>{{cite web|url=http://galileo.rice.edu/Catalog/NewFiles/gray.html|title=Gray, Stephen|last=Westfall|first=Richard S.|work=The Galileo Project}}</ref>
* [[Pierre Bouguer]] publishes ''Essai d'optique sur la gradation de la lumière'', defining the quantity of light lost by passing through a given extent of the [[Earth's atmosphere]], thus making some of the earliest measurements in [[Photometry (optics)|photometry]] and becoming the first known discoverer of what becomes known as the [[Beer–Lambert law]].<ref>{{cite book|last=Lamontagne|first=Roland|title=La vie et l'oeuvre de Pierre Bouguer|publisher=Presses de l'Université de Montréal|year=1964}}</ref>