This letter, dated December 4, 1818, from James Brown to Boulton, Watt & Co., includes three sheets of detailed sketches and descriptions of Jean Samuel Pauly’s model for steam boat propulsion. The sketches, printed on delicate tissue paper, illustrate the mechanical details of Pauly's innovative design aimed at enhancing the efficiency of steam-powered boats. The correspondence provides a historical snapshot of early 19th-century engineering efforts and the detailed analysis and documentation practices of the time.
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