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Forside 1769 James Watt also invented a Portable Copying Machine by James Watt & Co. Circa 1795. Photo: Rau Antiques on 9 August 2017. (CC BY-SA 4.0).

James Watt also invented a Portable Copying Machine by James Watt & Co. Circa 1795. Photo: Rau Antiques on 9 August 2017. (CC BY-SA 4.0).

Rotative steam engine by Boulton and Watt, 1788. Boulton and Watt Rotative Beam Engine - the 'Lap' engine. This is the oldest essentially unaltered rotative engine in the world. Built by James Watt in 1788, it incorporates all of his most important steam-engine improvements. The engine was used at Matthew Boulton’s Soho Manufactory in Birmingham, where it drove 43 metal polishing (or ‘lapping’) machines for 70 years. © The Board of Trustees of the Science Museum. (CC BY-NC-SA 4.0)

James Watt also invented a Portable Copying Machine by James Watt & Co. Circa 1795. Photo: Rau Antiques on 9 August 2017. (CC BY-SA 4.0). Source: Wikimedia Commons.

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