French physicist (1820-1891) credited with the discovery of the photovoltaic effect. ALS in French, one page both sides, 5.25 x 8, blindstamped monogram letterhead, December 30, 1860. Letter to Antoine Passy giving news of an injury to his father, the scientist Antoine Cesar Becquerel, in part (translated): "He fell on the snow, but he has neither fever nor inflammation, and except for the malaise resulting from his horizontal position in which he is obliged to remain…he is doing as well as possible for his position." In fine condition.
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