Excerpt from The Permian or Upper Carboniferous Flora of West Virginia and S. W. Pennsylvania We were led to confine our examinations and collections to the strata above the Pittsburg coal bed by several induce ments. One important reason was, that only in this por tion of the Carboniferous strata could we expect to find any change in the flora pointing to the assumption of a Per mian facies. Again, the fullest development of the highest beds occurs in West Virginia, and seem to be richer in plant impressions than elsewhere. Another reason was, that the plant impressions found in the Pittsburg and underlying beds, had already received, or would soon receive, ample study in the surveys of the adjoining States. 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.