This rotative steam engine was designed and built by James Watt (1736-1819) and Matthew Boulton (1728-1809). Watt was a Scottish engineer and inventor. He was at the forefront of the development of steam engines and described a steam locomotive in one of his patents. Boulton was Watt's busines partner. In 1774 they established a manufactory of steam engines in Soho, near Birmingham.
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