La langue des calculs, ouvrage posthume et élémentaire, imprimé sur les manuscrits autographes de l'auteur.

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.