Gilbert's terrella 'Earth' magnet. Page from 'De Magnete' (On the Magnet,1600) by English physicist William Gilbert (1544-1603). The diagram shows Gilbert's terrella ('little Earth'),a magnetised sphere he used to model the Earth and its magnetic field. The angle of iron bars at various latitudes is shown. '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 76,chapters 6 and 7,book 2 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Library of Congress |
Bildgröße: | 3390 px × 5160 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |