French chemist (1800–1884) best known for his work in determining atomic and molecular weights. Three ALSs, each signed "J. Dumas," totaling four pages on three sheets, 5.5 x 8, no dates but circa 1840s. Dumas writes to friends, arranging appointments and meetings, and recommending a candidate for l'Ecole des Beaux Arts, noting that the young man has "a wide knowledge and well known abilities." In overall fine condition. Accompanied by English translations for the three letters.
