Excerpt from Pure Logic and Other Minor Works
In the present volume are contained some of the earliest and some of the latest contributions of the author to the science of logic. 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 indication of common aim or principle. The first group consists of independently published works, the Pure Logic and the Substitution of Similars, with certain papers in which the general principles of the author's logical theory, stated in their most mature form in his main logical works, the Principles of Science and the Studies in Deductive Logic, are carried out in certain special directions. In the second group appear such portions of a general examination of J. S. Mills philosophy as had been completed at the date of the author's 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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This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works. Это и многое другое вы найдете в книге Pure Logic and Other Minor Works (Classic Reprint) (William Stanley Jevons)