William Stanley Jevons

Pure Logic and Other Minor Works William Stanley Jevons

The several works and papers that have been included fall into two distinctly marked groups, corresponding on the whole to the difference in time of their composition, and presenting at first sight no very clear indi cation of common aim or principle. The first group consists of independently published works, the Pure Logic and theS ubstitution of Similars, with certain papers in which the general principles of the authors logical theory, stated in their most mature form in his main logical works, the Principles of Science and theS tudies in Deductive Logic, are carried out in certain special directions. In the second group appear such portions of a general examination of J. S. Mill sphilosophy as had been completed at the date of the authors death. The essays in the first group seem to claim a place in a permanent collection of the authors works, partly from the historic importance that must always attach to them, partly by reason of the relative fulness of discussion which they extend to certain fundamental and characteristic ideas in the general view of logic contained in them. They are reprinted as they originally appeared, with only the correction of one or two obvious misprints.
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