London School and Political {University of Economics Science of London) A Critical Dissertation on the Nature, Measures, and Causes of Value; Chiefly in Reference to the Writings of Mr. Ricardo and His Followers hy THE AUTHOR OF ESSAYS ON THE FORMATION AND PUBLICATION OF OPINIONS, efc.. efc. NO. 7 IN SERIES OF REPRINTS OF SCARCE TRACTS IN ECONOMIC AND POLITICAL SCIENCE