Author : Henry E. Rhoades
Publisher : Forgotten Books
ISBN 13 : 9781334909108
Total Pages : 318 pages
Book Rating : 4.9/5 (91 download)
Book Synopsis Tribune Almanach and Political Register for 1897 (Classic Reprint) by : Henry E. Rhoades
Download or read book Tribune Almanach and Political Register for 1897 (Classic Reprint) written by Henry E. Rhoades and published by Forgotten Books. This book was released on 2017-01-06 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Tribune Almanach and Political Register for 1897 The azimuths in the annexed table, applied properly to the magnetic bearing of P0 laris at the time of its greatest elongation east or west, will give the true variation of the magnetic needle from a true north direction, and will be of great use to all surveyors and engineers. When the elongation is east the azimuth will be east and vice versa. At the present time the line of No Variationof the needle runs south easterly from near Toledo, Ohio, to a point on the Atlantic coast about fifty miles southwest of Cape Fear, N. C. East of that line the north end of the needle points west of a true north, and west of that line east of the true north. The coun try may therefore be divided into eastern and western magnetic regions. In the Eastern Region the bearing of Polaris at its western elongation, if east ward, added to the azimuth, gives. The desired variation west; but if west ward, the bearing taken from the ammuth gives the variation west. The' bearing of Polaris at its eastern elongation will be eastward, and the azimuth subtracted there from gives the variation west. In the Western Region the bearing of Polaris at its eastern elongation, if westward, added to the azimuth, gives the variation east; but if eastward, the bearing taken from the azimuth gives the variation east. The bearing of Polaris at its western elongation will be westward, and diminished by the azi muth gives the variation east. The azimuths in the table, given for two degree zones, are practically sufficient for all the United States except Alaska. For interme diate latitudes, and dates, the azimuths may be found by proportion sufficiently correct, or exactly by the formula, log-sine azimuth equal log-sine Polar Distance of Polaris, minus log-cosine latitude. The surveyor or engineer is on the line 0-1: No Varia tion when the bearing of Polaris at greatest elongation is the same as the azimuth. 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.
