By ADAM SMITH, LL. D. and F. R. S. IN TWO VOLUMES. VOL. I: THE SECOND EDITION. LONDON: PRINTED FOR W. STRAHAN; AND T. CADELL, IN THE STRAND. PART 3d. Of the Variations in the Proportion between the refpective Values of that Sort of Produce which always affords Rent, and of that which fometimes does, and fometimes Digreffion concerning the Variations in the Value of Silver du- |