Principal facts of the earth's magnetism and methods of determining the true meridian and the magnetic declination. Reprinted from the United States magnetic declination tables and isogonic charts for 1902 (1909)
U.S. Coast and Geodetic Survey · Washington Govt. Print. Off · leaf 73
\ Declination o m2 r1 o ^ East West 63354- -n Vex-tic al Intensi^ Horizontiil Tnteriisity Declination … -J 2 CO 05 A^ Decreacin6 VncreaL6in6 Decreasing Increasinb CD East West, PRINCIPAL FACTS OF THE EARTHS MAGNETISM. 61 Fig. 15 shows the cun-es on a disturbed day. Looking at the second curve fromthe top, it is seen that the decHnation curve runs along smoothh- until somewhat after4 a. m., local mean…
Magnetism, Terrestrial
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Results of the magnetical and meteorological observations made at the Royal Observatory, Greenwich, in the year 1876[-82.] (1882)](https://img.insideoutlibrary.com/img/200/ia-resultsofmagneti06roya-94-1.webp)
