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Excerpt from United States Magnetic Declination Tables and Isogonic Charts for 1902 and Principal Facts Relating to the Earth's Magnetism The United States Magnetic Declination Tables for 1902 is a continuation of the series of papers, begun in 1855, treating of the magnetic declination in the United States, and published, with the authority of law, by the Coast and Geodetic Survey. The previous papers contained the magnetic declination tables and accompanying Charts of lines of equal magnetic declination (isogonic charts) for the following epochs, successively: 1850 (first edition), 1850 (second edition), 1860, 1870, 1875, 1885, 1890, and 1900, the last published in 1897. The accumulation of much additional material since the date of the last publication and the constantly increasing demand for magnetic data have made it imperative to bring the tables up to date. Owing to the large number of stations that it has been possible to occupy annually since July 1, 1899, when the facilities and means for magnetic work were enlarged, the present paper can, if necessary, be followed by another in a few years bringing the results up to 1905. Thereafter it is proposed to issue the publication at suitable inter vals. In addition it is the intention to publish the results obtained by the magnetic parties of the Coast and Geodetic Survey during each year in the 'annual Report of the Superintendent. 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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