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 88
factor for fixing the ships position, e. g., if sufficientlyaccurate dip observations were possible on board ship, they might help materially, with the aid ofthe isoclinic charts, to fix the position. In times of clear weather, when celestial objects are visible, there would of course be no need… … 63354—9 PRINCIPAL FACTS OF THE EARTHS MAGNETISM. 6? Historical Summary. The first complete magnetic survey in which the three magnetic elements—decli-nation, dip, and intensity—were determined, and which was executed as a nationalpiece of work and was coextensive with the limits of the country…
Magnetism, Terrestrial
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
