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 84
> ^ < rr 5 01 ■-I T o W ir h m Cl OJ o I-. l- r— < z T- 1 C) uo -rt .^ 1- UJ y n ^ < - _J -) o ■1^ Hi a< II <) oj UJ .- … PRINCIPAL FACTS OF THP; IvARTHS MAGNETISM. 65 parallels. It is more nsnal, however, to call the lines of equal dip the magneticparallels. The isogenic lines, on the other hand, pass through four points—two in each hemi-sphere, the magnetic pole and the geographical pole. (See Fig. 24, which gives…
Magnetism, Terrestrial
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
