Excerpt from Facts and Comments During the years spent in writing various sys tematic works, there have from time to time arisen ideas not fitted forgincorporation in them. Many of these have found places in articles published in re views, and are now collected together in the three volumes of my essays. But there remain a number which have not yet found expressmn: some of them relatively trivial, some of more interest, and some which I think are important. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com 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.