Excerpt from The Mineralogy of Pennsylvania, Vol. 1: To Be Used as a Supplement in Connection With Dr. F. A. Genth's "Preliminary Report on the Mineralogy of Pennsylvania"According to P. Frazer, chalcocite (in ore) occurs at the Big Hill, Cornwall. Also sparingly at Fritz's Island and at Jones' Mine, Berks Co.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.