Swedish-American Army engineer (1803-1889) who designed and built the ironclad warship Monitor for the American Navy. ALS signed “J. Ericsson,” one page, 7.75 x 9.75, December 14, 1858. Handwritten letter pertaining to the manufacture of his caloric engine, in part: "Mr. Jones is so perfectly satisfied about the Caloric engine that he does not want to see any of our machines in operation—He returned to Philadelphia tonight…I have promised that after consulting with our legal advisor in the matter we will write—Mr. J. is more anxious in the matter than I expected and came in not to be convinced but to make an arrangement in regard to manufacture." In very good to fine condition, with show-through along the left edge from an old mounting strip on the back.
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