Partly-printed vellum DS, signed “James Madison” as president and “Jas. Monroe” as secretary of state, three pages on two sheets, 11.5 x 14.25, February 2, 1814. A patent issued to Daniel Dod for “a new and useful improvement in Machinery for Steam Boats.” Signed at the conclusion by Madison and Monroe, and countersigned by Attorney General William Pinkney. The embossed white paper seal and white ribbons to the left side remain intact. The second page, still attached by the binding ribbon, contains Dod’s own description of the manufacturing techniques used in the construction of a boiler and a condenser consisting of pipes. In fine condition. Dod was a mathematician and a mechanical engineer who, after declining an appointment as a professor of mathematics at Rutgers, devoted his career to the construction of steam machinery. In 1819, he created the engine for the SS Savannah, the first steamboat to cross the Atlantic Ocean.
Ex. Sotheby’s, December 6, 1977; sale 4058, lot 367. Pre-certified PSA/DNA.
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