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<p>designed the first 'semi-portable' <a href="page.php?w=stationary_steam_engine">stationary steam engine</a> for agricultural use, known as a "barn engine" in 1812, and it was used to drive a corn threshing machine. The truly portable engine was invented in 1839 by William Tuxford of <a href="page.php?w=Boston%2C_Lincolnshire">Boston, Lincolnshire</a> who started manufacture of an engine built around a locomotive-style boiler with horizontal smoke tubes. A large <a href="page.php?w=flywheel">flywheel</a> was mounted on the crankshaft, and a stout</p><p>
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