Steam engine

1765 Steam engine

The book of science

Tom Sharp

James Watt thermodynamics Steam engine

Steam engine

Denis Papin

Smeaton, too

Why Watt?

Heat engines

Atmospheric pressure was discovered in 1643 by Evangelista Torricelli, who invented the mercury barometer. Blaise Pascal was able to prove that the gap at the end of the barameter was a vacuum. Newcomen’s engine was called an atmospheric engine because it relied on atmospheric pressure against a vacuum created by cooling steam in a chamber. The Newcomen engine was not driven by steam pressure.

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