| Terrestrial magnetism, | Nes-9-an-*Map-2475 *Map 60,1896.3
United States. Geological Survey.
Distribution of the magnetic declination in the United States in 1900. Compiled by Henry Gannett.
{Washington, 1896.] Size, 16 7/8 x 27 9/l6
inches. Scale (computed), 110 miles to 1 inch. Reprinted from the 17th Annual report of the Survey, part 1 (*7870.55.17, part 1].
D7148 - United States. Geog. Maps. - Gannett, Henry. - Terrestrial magnetism, &