Alfred Tarski, “Über den Begriff der logischen Folgerung”, in Actes du Congrès International de Philosophie Scientifique, fasc. 7 (Actualités Scientifiques et Industrielles, vol. 394), Paris: Hermann et Cie, , 72pp, the Tarski in pp. 1–11. Original printed wrappers; there’s a little chip missing from the bottom half-inch of spine. Largely unopened. VG copy. $75

(Published in English as: Tarski, A. “On the Concept of Logical Consequence.” In Logic, Semantics, Metamathematics. 2d ed. By A. Tarski. Edited by J. Corcoran, 409–420. Indianapolis, Indiana.)

Tarski’s presentation of his theory of logical consequence as universal truth-preservation over interpretations of the non-logical constants. This is a widely used translation of the 1936 German version. (Original title of the 1936 German version: “Über den Begriff der logischen Folgerung.”)–Oxford Bibliographies

Introduced as a “Classic”, translated from the Polish and German by Magda Stroika and David Hitchcock

“In (1936), Tarski presented for the first time, in German, his new semantic definition of logical consequence and logical truth. He starts to motivate his definition
by critizicing traditional syntactic definitions. “–Gerhard Schurz, “Tarski and Carnap on Logical Truth — or: What Is Genuine Logic?”