Daniel Lyman Hazard / U.S. Coast and Geodetic Survey
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Terrestrial Magnetism: Distribution of the Magnetic Declination in the United States for January 1, 1915 With Isogonic Chart and Secular Change Tables presents a detailed examination of the Earth’s magnetic field across the United States at the beginning of 1915. Prepared by the U.S. Coast and Geodetic Survey under the direction of Daniel Lyman Hazard, this work offers valuable insights into the spatial distribution of magnetic declination, a crucial factor for navigation and surveying at the time. The book features an isogonic chart, visually representing lines of equal magnetic declination, alongside comprehensive secular change tables. These tables provide data on the annual variations in magnetic declination, enabling users to adjust their measurements for changes occurring over time. This historical document is an essential resource for researchers, historians of science, and anyone interested in the study of geomagnetism and its applications.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
