Swedish-American Army engineer (1803–1889) who designed and built the ironclad warship Monitor for the American Navy. ALS signed “J. Ericsson,” one page both sides, 5 x 8, September 24, 1859. Letter to an unidentified recipient. In full: “I have just returned from the Oliver boat where I have been to set the canes and test the circulating pumps—I am happy to say that my apprehension that the resistance offered by the passing through one hundred wire discs might prove too great, is quite removed—A very moderate pressure in the pump handle suffices to send the charge through—But for Layburn having broken one of the thermometers, the great trial would have come off today—Now it has been put off until next Monday when a start will be made and, I trust, a successful one—The new thing of jet pumps & circulating pumps promise well.” In fine condition. Pre-certified John Reznikoff/PSA/DNA and RR Auction COA.
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