Excerpt from Report of Progress: The Geology of Philadelphia County and of the Southern Parts of Montgomery and BucksAn Index to specimens thus described and analyzed will be found at the end of the Volume.An Index of their localities will be found included in the general Index to the names of persons and places mentioned in the report.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.