Duff, A. Wilmer (Alexander Wilmer), b. 1864, ed, Guthe, Karl Eugen, 1866-1915, Hallock, William, 1857-1913, Lewis, E. Percival (Exum Percival), 1863-1925, Goodspeed, Arthur W. (Arthur Willis), b. 1860, Carman, Albert Pruden, b. 1861, McClung, Robert Kenning, 1874- · Philadelphia, P. Blakiston's Son & Co · leaf 512
Amundsen in 1907 and found to be at 75° 5 N. latitude and96° 47 W. longitude. There is a corresponding south magnetic pole whichGauss located by calculation at latitude 72° 35 S., and longitude 150° 10E. This pole has never been reached though Ross in 1841 arrived at apoint which he calculated to… … 494 ELECTRICITY AND MAGNETISM. Lines of equal declination have the same general arrangementas the geographical meridians and are called isogonic lines. Theyevidently converge at the magnetic poles. The isogonic of zerodeclination is knowTi as an agonic line. Fig. 358 shows the isogoniclines for the…
Physics
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