File:EB1911 - Magnetism, Terrestrial - Fig. 4.—Isomagnetics, lines of equal vertical force.jpg
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current | 01:45, 27 December 2020 | 1,075 × 565 (517 KB) | DivermanAU | Uploaded a work by Emery Walker from ''Encyclopædia Britannica'' (11th ed.), v. 17, 1911, "Magnetism, Terrestrial" article, pp. 358 ff. Modified from https://www.gutenberg.org/files/43060/43060-h/43060-h.htm#ar107 with UploadWizard |
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