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1851 in science
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==Chemistry== * March β [[English people|English]] sculptor [[Frederick Scott Archer]] makes public the [[Collodion#Wet plate collodion photography|wet plate collodion]] photographic process.<ref>''The Chemist'' March 1851.</ref> * [[Julius Pintsch]] produces Pintsch gas. * [[Charles-Adolphe Wurtz]] produces compound [[urea]]s.
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