Gilbert on magnetic declination,1600
Bildnummer 12055762
| Gilbert on magnetic declination. Page from 'De Magnete' (On the Magnet,1600) by English physicist William Gilbert (1544-1603). The title at top states: 'That the variation is caused by the inequality of the projecting parts of the earth'. The diagram shows Gilbert's experiment on a terrella ('little Earth',magnetised sphere) with a depression representing the Atlantic Ocean,attempting to explain magnetic declination,where a compass needle does not point to true North. 'De Magnete' reported Gilbert's studies of magnetism and electricity. He theorised that the two forces were closely related. He also considered the Earth to be a spherical magnet. This first edition of 'De Magnete' consisted of 115 chapters in six books and 246 pages. This is page 155,chapter 2,book 4 | |
| Lizenzart: | Lizenzpflichtig |
| Credit: | Science Photo Library / Library of Congress |
| Bildgröße: | 3437 px × 5096 px |
| Modell-Rechte: | nicht erforderlich |
| Eigentums-Rechte: | nicht erforderlich |
| Restrictions: | - |
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