Physicist (1797-1878) who conducted experiments in the field of electromagnetism and served as the first secretary of the Smithsonian Institute. ALS signed “Joseph Henry, Sect. S. I.,” one page, 5 x 9.25, Smithsonian Institution letterhead, August 29, 1871. Handwritten letter to Messrs. C. F. Zimmerman & Co. in New York, in full: "As soon as our Book-Keeper returns from a brief leave of absence it will give us pleasure to settle your a/c." In very good to fine condition, with trimmed edges, slight ink offsetting, and paper loss to the upper left corner.
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