THENARD, L. J. Traité de chimie élémentaire. Paris: 1813-16. 4 vols., 8°, engraved plates, contemporary orange boards (a little worn). PRESENTATION COPY, front free endpaper in Vol. I inscribed "a Monsieur Monge hommage de l'auteur". FIRST EDITION. Bolton p. 867; and 58 others, most scientific and mathematical works, published in the 18th and early 19th century. (64)