Excerpt from An Investigation of the Laws of Thought, on Which Are Founded the Mathematical Theories of Logic and Probabilities Information upon the subject-matter will be found in the special treatises on Probabilities in Lardner's Cabinet Cyclopaedia, and the Library of Useful Knowledge, the former of these by Professor De Morgan, the latter by Sir John Lubbock; and in. 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.