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Excerpt from Economic Geology United States: With Briefer Mention of Foreign Mineral Products Whenever possible, the localities chosen for description are those with which the author is personally familiar; but, in a field so broad, and covering so many diverse industries, it is scarcely possible for one person to possess information concern ing all, or even a large proportion, of the typical occurrences, or even of all the industries. The work' is, therefore, in many parts a compilation, and free use has been made of all available sources. This has sometimes amounted to an abstract of descrip tions or conclusions, but rarely to actual quotations, since a more condensed statement than is usually found in such sources is needed here. The statistics are almost entirely compiled from the standard sources, and, where more detailed information is desired upon these subjects, reference may be made to these original sources. 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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