Editing 1823 in science (section)

==Technology==
* December 6 – English inventor [[Samuel Brown (engineer)|Samuel Brown]] obtains his first [[patent]] for a hydrogen fuelled compressionless atmospheric gas vacuum engine,<ref>Gill, T. (1826). ''The Technical Repository'', p. 383.</ref> the first [[History of the internal combustion engine|internal combustion engine]] to be applied industrially.<ref>{{cite book|title=Samuel Morey and his atmospheric engine|first=Horst O.|last=Hardenberg|location=Warrendale, Pa.|publisher=Society of Automotive Engineers|year=1992|series=SP-922|isbn=1-56091-240-5}}</ref>
* First use of a [[Fresnel lens]] in a [[lighthouse]] optic, at the [[Cordouan lighthouse]] on the [[Gironde estuary]].<ref>{{cite journal|last=Watson|first=Bruce|title=Science Makes a Better Lighthouse Lens|journal=[[Smithsonian (magazine)|Smithsonian]] |volume=30|page=30 |date=August 1999}}</ref>
* First permanent [[wire]] [[Wire rope|cable]] [[suspension bridge]], Pont Saint Antoine in [[Geneva]], by [[Guillaume Henri Dufour]], of two 40 m spans.<ref>{{cite book|last=Peters|first=Tom F.|author2=Andrea L.|title=Transitions in Engineering: Guillaume Henri Dufour and the Early 19th Century Cable Suspension Bridges|location=Basel|publisher=Birkhauser|year=1987|isbn=3-7643-1929-1}}</ref>
* First [[cast iron]] framed [[greenhouse]] erected at [[Wollaton Park]] in England as a ''[[Camellia]]'' house.
* French officer [[Henri-Joseph Paixhans]] develops the [[Paixhans gun]], the first [[naval artillery]] to fire explosive [[Shell (projectile)|shells]].