Watt's wagon-boiler, 1866. This type of boiler was invented by James Watt in 1785. A print from Cyclopaedia of Useful Arts, Mechanical and Chemical, Manufactures, Mining, and Engineering, edited by Charles Tomlinson, Volume II, Virtue and Co, London, 1866. (Photo by The Print Collector/Print Collector/Getty Images)
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January 27th, 2021
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