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FARADAY, Michael (1791-1867). Natural philosopher. Autograph Letter Signed to M.C. Tupper, 1 page 8vo on embossed paper of Royal Institution of Great Britain, 3 July 1862. Thanking him for photographic copies of his medals. '... I am very much obliged by your kindness in sending me the photographic copies of your medals. I guess as well as I can whether the metal of each was gold or silver.' [No: 21274]
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