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Updated: October 8, 2025
This immediately suggested to his fertile mind a new source of power, and he labored long to apply it, but without success, until there fell into his hands a book describing the old atmospheric steam engine of Newcomen, and he was at once struck with the fact that steam was only used to produce a vacuum while to him it seemed clear that the elastic power of the steam if applied directly to moving the piston, would be far more efficient.
Then in 1705 Newcomen and Cawley, working with Savery, took up Papin's idea, separated boiler from cylinder, and thus produced a vacuum into which atmospheric pressure forced the piston and worked the pump.
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