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Discovery of Oxygen by Joseph Priestly
Society: ACSMain Category: ChemicalSub Category: Frontiers of KnowledgeEra: 1750-1799DateCreated: 1774Joseph Priestley HouseNorthumberlandState: PAZip: 17857Country: USAWebsite: http://portal.acs.org/portal/acs/corg/content?_nfpb=true&_pageLabel=PP_SUPERARTICLE&node_id=521&use_sec=false&sec_url_var=region1&__uuid=0af17f7c-0447-4b06-a716-8e74a6b01a5fCreator: Priestley, Joseph

When Joseph Priestley discovered oxygen in 1774, he answered age-old questions of why and how things burn. An Englishman by birth, Priestley was deeply involved in politics and religion, as well as science. When his vocal support for the American and French revolutions made remaining in his homeland dangerous, Priestley left England in 1794 and continued his work in America until his death. His library of some 1,600 volumes and his chemical laboratory, where he first isolated carbon monoxide, were probably the best in the country at that time.

YearAdded:
2000
Image Credit: Public Domain; Produced prior to 1/1/1923Image Caption: Joseph Priestley: Discoverer of OxygenEra_date_from: 1774
Ljungstrom Air Preheater
Society: ASMEMain Category: MechanicalSub Category: Manufacturing, Mechanical Power Production - SteamEra: 1920-1929DateCreated: 1920Tekniska MuseetStockholmCountry: SwedenWebsite: http://www.asme.org/about-asme/history/landmarks/topics-m-z/manufacturing---2/-185-ljungstrom-air-preheater-%281920%29, https://www.asme.org/getmedia/c7cf3d83-508f-4946-b476-9399c390fc83/185-Ljungstrom-Air-Preheater.aspxCreator: Ljungstrom, Fredrik

The Ljungstrom air preheater is a regenerative heat exchanger, invented in the 1920s and soon used throughout the world. Dr. Fredrik Ljungstrom, then technical director at Aktiebolaget Ljunstrom Angturbin, invented it for preheating combustion air in boiler plants, but the use has expanded to include energy recovery in combination with the removal of oxides of sulfur and nitrogen.

YearAdded:
1995
Image Credit: Public DomainImage Caption: Ljungstrom Air PreheaterEra_date_from: 1920
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