Product Catalog › Jean-Antoine Chaptal (1756-1832) Jean-Antoine Chaptal (1756-1832) $0.00 Chemist and homme d'état (Minister of the Interior); letter signed, 1 page, to Leclerc. Paris, 1802 Add To Cart Added! Chemist and homme d'état (Minister of the Interior); letter signed, 1 page, to Leclerc. Paris, 1802