French physicist (1852-1908) whose experiments with uranium salts led to the discovery of spontaneous radioactivity; for this breakthrough he shared the 1903 Nobel Prize for Physics with Marie and Pierre Curie. ALS in French, one page both sides, 4.5 x 7, Institut de France letterhead, June 3, 1908. Untranslated handwritten letter by Becquerel. In fine condition.
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