Excerpt from First, Second, and Third Annual Reports of the United States Geological Survey of the Territories: For the Years 1867, 1868, and 1869, Under the Department of the Interior Although they were written in the field and forwarded to Washington in detached portions, and, in the case of the first and second reports, printed without the supervision of the writer, I have thought it best to make no alterations or additions in the present reprint, but to let the reports continue to mark the steps of progress of the survey from year to year. 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.