The first commercially successful steam engine begins pumping

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Thomas Newcomen's atmospheric engine was erected at a coal working in the West Midlands and used to lift water from the workings. The traditional site is Dudley Castle; more recent research argues for the Coneygre coal works at Tipton, and the question is not settled. The engine's thermal efficiency was under one per cent, which was irrelevant at a pithead where the fuel was underfoot.

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