- In 1764, Watt received a Newcomen steam engine to repair.
- The 1712 Newcomen engine worked by condensing steam in a cylinder, which then creates enough push to power a piston.
- While fixing the engine, James Watt noticed that more than three-quarters of the steam was wasted due to repeated heating and cooling in the same cylinder.
- He then designed a cylinder that had a separate chamber to condense the steam in. Watt's engine kept the cylinder at a stable temperature as the steam condensed in a separate chamber. This was revolutionary.
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