Town Geology, The Lesson of the Philadelphia Rocks

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Excerpt from Town Geology, The Lesson of the Philadelphia Rocks: Studies of Nature Along the Highways and Among the Byways of a Metropolitan Town In presenting the following pages to the public the author lays no claim to having materially contributed to our existing knowledge of the geology of Philadelphia. His aim has been merely to so interpret many of nature's teachings as to render them readily comprehensible to the average mind, and to awaken that spirit for investigation which cannot but prove both pleasurable and profitable, and which, unfortunately, only too frequently remains dormant for want of proper cultivation. With this object in view he has omitted superfluous details, and the discussion of questions which are in the main still of a controversial character. The observations recorded are almost exclusively such as have fallen to the personal notice of the author, although for many of the data bearing upon the history of the gravels and clays he is indebted to the writings of Prof. H. C. Lewis, who has made a special study of the formation. The geological sketch map of the State of Pennsylvania is based upon a similar map prepared to illustrate an article by Prof. J. P. Lesley for the "Encyclopædia Britannica." 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.