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 26
the fears of his sailors he practiced some pardonable decep-tion on them, and may possibly have changed the points of the compass, as he had done,according to his own confession, once before on another voyage, iu order to force theinclination of a possibly mutinous crew to his will ao ,so° 40 20… … Fm. 4.—I^ines of equal magnetic declination lor i5rx) (van Bemmelen). The explanation which Columbus gave for the departure of the needles observedbetween September 13 and 17, that the North Star moved in its place, while the needlesremained stationary, was, of course, a mere fiction to quiet the…
Magnetism, Terrestrial
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
