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Henry Bells steam boat Comet of 1811, (1856). The Comet, 40ft long (12.19m), powered by a 3hp Boulton & Watt engine, was the first successful steam boat in Europe
Model of a Newcomen steam engine, 1856. It was while repairing this engine that James Watt (1736-1819) is said to have invented the separate condenser
