This collection of thirteen classic essays in philosophic semantics has become a major reference source for inquiry into the meaning of truth and the philosophy of language. Exact reporductions of teh articles as they originally appeared, the papers cover a variety of semantic problems, all basic to the framework of the entire field but none too particularized or simple for the intellectually mature student or reader. To list the authors is to name some of the greatest minds of our times: Rudolf Carnap, Nelson Goodman, Carl G. Hempel, C.I. Lewis, Paul Markhenke, Benson Mates, Arne Naess, Willard V. Quine, Bertrand Russell, Alfred Tarski, and Morton G. White.