539359 A terrella or globe-shaped magnet with lumps of iron to represent mountains and showing the north-seeking property of a magnetic needle. From William Gilbert De Magnete, London, 1600 by Gilbert, William (1544-1603); (add.info.: "De Magnete, Magneticisque Corporibus"; English physicist experimenting in magnetism; Gilbert concluded that the earth was magnetic and this was why the compass pointed north; father of electricity; ); Universal History Archive/UIG; English, out of copyright.