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Excerpt from Manual of Coal and Its Topography: Illustrated by Original Drawings, Chiefly of Facts in the Geology of the Appalachian Region of the United States of North America In explanation, it is necessary only to add, that the sketches were all made upon the ground and drawn on wood by the author, to pre serve with accuracy those points of interest to his own mind which he desires to illustrate in the text, and upon this their whole value as illustrations of truth depends; as works of art they are nothing. In three instances (figs. 7, 17, 18) he has copied drawings which have been given to the public by others; in one other instance 31) he has, after some hesitation, given data transmitted through a private letter of an old date, without previously obtaining the permission of its author. With these exceptions, he believes his book to be free from actual plagiarisms. It must happen, however, that out of a mass of materials brought together under every variety of circumstances, through nearly twenty years of observation, even the small selection here made must contain many which are due to the labors of others, and bestowed in friendship or business upon the author. He finds it of course impossible to do justice to this interchange of thought and Work; but Wherever important contributions to science could be iden tified with those who made them, he has done it, and for the rest can only thank friends of the past and present time in general but respect ful and affectionate terms. 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.

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