Download or read book Second Geological Survey of Pennsylvania, 1874-5 written by Andrew S. McCreath and published by Forgotten Books. This book was released on 2017-11-21 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Second Geological Survey of Pennsylvania, 1874-5: Report of Progress in the Laboratory of the Survey at Harrisburg The coal has a shining lustre, columnar structure, is easily broken, and contains small scales of iron pyrites. 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.