Physicist (1797-1878) who conducted experiments in the field of electromagnetism and served as the first secretary of the Smithsonian Institute. Partly-printed DS, one page, 8 x 10.75, May 6, 1878. Receipt from the Smithsonian Institution, in full: "The Smithsonian Institution has received from Chas. Aldrich…Specimens of turtle (Pseudenys picta var. marginata) and snake (Coluber obsoletus confinis), a gift for which it returns a grateful acknowledgment." In very good condition, with several small tears and losses to edges.
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