French mathematician, engineer, and physicist (1781-1840) whose contributions spanned pure mathematics, electricity and magnetism, optics, mechanics, and thermodynamics. ALS in French, signed “Poisson,” one page both sides, 8 x 10, Université de France letterhead, June 21, 1825. Letter to the minister of justice, requesting an audience of a few minutes. In fine condition, with toning from prior display.
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