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Benjamin Dearborn
Benjamin Dearborn (1754–1838) was a printer and mechanical inventor in Portsmouth, New Hampshire and Boston, Massachusetts in the late 18th and early 19th centuries. His inventions include the gold standard balance,〔Columbian Centinel; Feb. 25, 1804.〕 spring scale,〔National cyclopaedia of American biography, v.4, p.473.〕 grist mill, candlestick, ballot box,〔Murphy D. Smith, David Borodin. Due reverence: antiques in the possession of the American Philosophical Society. Volume 203 of Memoirs of the American Philosophical Society. DIANE Publishing, 1992; p.68. Includes illustrations of the ballot boxes.〕 perspective drawing machine,〔Description of a Simple Machine for Drawing in Perspective. Universal Asylum 1 (February 1791), 67-68. Cited in: (【引用サイトリンク】author=Wendy Bellion )〕 letter-press, "musical board for the instruction of the blind," thermoscope,〔American Apollo, December 4, 1794.〕 vibrating steelyard balance,〔Philadelphia Gazette, March 26, 1800.〕 and perpendicular lift.〔Boston Daily Advertiser; Sept. 25, 1817.〕
==Brief biography==
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