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== Watt engine produced by Hathorn, Davey and Co == In the 1880s, Hathorn Davey and Co / Leeds produced a 1 hp / 125 rpm atmospheric engine with external condenser but without steam expansion. It has been argued that this was probably the last commercial atmospheric engine to be manufactured. As an atmospheric engine, it did not have a pressurised boiler. It was intended for small businesses.<ref>{{Cite web|url=https://the-condensing-engine-project.com/history/daveys-engine-of-1885/|title=Davey's engine of 1885|date=27 June 2017 }}</ref> [[File:Daveys engine 1885.jpg|thumb|Daveys Engine 1885]]
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