Modelle des Kosmos: Modelle der Erde
Gilbert's Terrella
Model of the Earth as a magnet after William Gilbert, late eighteenth century
Gilbert founded modern geomagnetism around 1600. Geographical designations like equator, meridian, parallel and pole receive a new, geomagnetic definition. His model of the Earth, the Terrella (little Earth), is a spherical magnet.
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