Excerpt from Results of Spirit Leveling in Virginia: 1900 to 1913, Inclusive The connection with tidal stations for bench marks in certain areas that lie at some distance from the seacoast is still uncertain, and this fact is indicated by the addition of a letter or word to the right of the word Datum on tablets or posts. For such areas corrections for published results will be made from time to time as the precise-level lines of the United States Geological Survey or other Government organizations are extended. Topographic maps - Maps of the following quadrangles wholly or partly in Virginia have been published by the United States Geo logical Survey up to September 1, 1914. They may be obtained for 10 cents each or $3 for 50, except as otherwise noted, on application to the Director of the Survey at Washington, D. C. 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.