French physicist, astronomer, and mathematician (1774-1862) who established the reality of meteorites, made an early balloon flight, and studied the polarization of light. ALS in French, signed “Biot,” one page, 8.25 x 10.5, no date. Untranslated letter to Monsieur Emilien. In fine condition, with some light creasing, and slightly irregular toning.
Terms and abbreviations used in our descriptions.