CONDILLAC, Étienne Bonnot de La langue des calculs,... Lot 1060

CONDILLAC, Étienne Bonnot de La langue des calculs, ouvrage posthume et élémentaire, imprimé sur les manuscrits autographes de l'auteur. Paris C. Houel 1798 8vo: [4]-484-[4] pp. Contemp. mottled calf, gilt decorated spine with 5 bands (joints, edges, corners sl. rubbed). Good copy. 1st ed. of "The Language of Calculus", in which Condillac views science as a well-constructed language. "To calculate is to reason, and to reason is to calculate: if there are two names, there are not two operations." (pp. 226-227). Ref. J.J. Gray & K.H. Parshall. Episodes in the History of Modern Algebra (1800-1950), pp. 18-19. Prov. Mod. bookpl.