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 98
75 The change in the magnetic incHnation—the element principall>- involved in thelocation of the magnetic pole—along a magnetic meridian is in this region about o.8to 2 per kilometer, or i to 3 per mile. It is furthermore probable that the magneticpole is at present moving, because of the… … 0 to 20 JO «a JO MLOMtTHtS Fig. 26.—Map of region around North Magnetic Pole (Schott, 1890). location of the magnetic pole, defined as the focus of vertical dip, and its secular motion,ought to be determinable with sufficient accuracy within the period of the expedition. Observations of the diurnal…
Magnetism, Terrestrial
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
