Excerpt from Baltimore County, 1929 The present volume on Baltimore County is the eleventh of the series of reports dealing with the physical features of the several counties of Maryland. In it are considerations not only of the geology and mineral resources but also the physiography, soils, climate, magnetic declination, and forests. The Introduction, by Edward W. Berry, consists of an historical review of the development of knowledge concerning the physical features of Baltimore County and a bibliography of the more important maps and reports dealing with the area. It shows that the growth of knowledge has covered a long period of preliminary exploration, begin ning with the work of Captain John Smith and culminating in the refined investigations of the complicated problems of the crystalline rocks of the Piedmont. The earlier work by Tyson and others Without modern technique shows an intuitive understanding of the region of high char acter. The later modern investigations have been by a great many workers, beginning with the classic studies of the late Professor Williams and numerous studies by students at the Johns Hopkins University. The account of The Physiography of Baltimore County by Eleanora Bliss Knopf represents an exhaustive mature investigation of the surface features of the county in connection with the topographic development of the whole terrane bordering the central Atlantic coast, This report is based upon new methods of research and is not only a clear, consistent explanation of the present surface features of Baltimore County but a distinct contribution to the scientific interpretation of the origin of the various terraces and gorges of the Piedmont area extending from New Jersey southward. The Geology of the Crystalline Rocks of Baltimore County by Eleanora Bliss Knopf and Anna I. Jonas represents the results of years of study. The authors undertook this work with a knowledge of the detailed studies and general interpretation of the region by Williams, Mathews. 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.