Excerpt from Classified Index to the Publications of the American Philosophical Society: A List of Papers, Monographs, Treatises and Books Published by the Society, 1769-1940, Classified According to Subject In addition to its serial publications, the American Philosophical Society has published or has sponsored the publication of a number of separate works; these are listed under Miscellaneous Publica tions, the titles of which may be found on page 158. Except as indicated in this list, all of the Society's publications are for sale, and subscriptions are accepted for any or all of the series, and prices of back numbers are given on page 148. 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.