File:EB1911 - Magnetism, Terrestrial - Fig. 1.—Isogonals, or lines of equal magnetic declination.jpg
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Summary
| Description |
English: Isogonals, or lines of equal magnetic declination |
| Date | |
| Source | Encyclopædia Britannica (11th ed.), v. 17, 1911, "Magnetism, Terrestrial" article, pp. 356 ff. Modified from https://www.gutenberg.org/files/43060/43060-h/43060-h.htm#ar107 |
| Author | Emery Walker |
Licensing
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This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer. This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929. |
| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 00:54, 27 December 2020 | | 1,061 × 513 (573 KB) | DivermanAU | Uploaded a work by Emery Walker from ''Encyclopædia Britannica'' (11th ed.), v. 17, 1911, "Magnetism, Terrestrial" article, pp. 356 ff. Modified from https://www.gutenberg.org/files/43060/43060-h/43060-h.htm#ar107 with UploadWizard |
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