prepared for press from the original manuscript in the hands of the publisher, Antoine Louis Claude Destutt de Tracy ; translated by Thomas Jefferson. To which are annexed: Observations on the thirty-first [i.e.twenty-ninth] book by M. Condorcet, and Two letters of Helvetius on the merits of the same work. -- B. Franklin, [1969]. -- (Philosophy monograph series ; 18)(Burt Franklin research & source works series ; 290).