Diplôme de membre effectif de l'Académie royale... Lot 10

Diplôme de membre effectif de l'Académie royale des sciences, des lettres et des beaux-arts de Belgique, classe des lettres, délivré à Renier Chalon. Brussels June 21, 1859 43.5 x 55.5 cm, lithogr. and completed by hand, on wove leather, s. aut. of Baron de Gerlache, president, and [Adolphe] Quetelet, perpetual secretary, large red wax seal in metal case affixed with a tricolor ribbon (slight soiling and staining, especially on margins, small tear at ribbon notch, small crack in seal, otherwise complete). Beautiful diploma signed by Adolphe Quetelet (1796-1874), famous Belgian mathematician and astronomer, friend of Chalon and eminent Agathopède. Jointly 5 docs: 1-3. Quetelet, Ad. - 3 l.a.s. to R. Chalon concerning his election. Brux, 1859. Div. formats, 2 on Academy letterhead, 1 with postmarks (small tear due to opening of envelope). - 4 Rogier, Ch., Minister of the Interior - Certified copy of the royal decree validating the election and accompanying l.a.s.. Brux, 24-06-1859. In-f°, envel. cons. - 5. diploma of corresponding member. Ibid, May 10, 1851. 36 x 44 cm, hand-printed and completed, on wove paper, s. aut. by Ad. Quetelet and M.N.J. Leclercq, seal under paper (slight creases, some foxing and marg. soiling). (6 pcs)