ERSC 1F90 Lecture Notes - Lecture 7: Magnetic Anomaly, Frederick Vine, Paleomagnetism
9 Apr 2015
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625 bc 545 bc aristotle attributed the first scientific discussion on magnetism to. Ancient china, the master of demon valley the lodestone makes iron come to it, or attracts it. (lodestone is magnetite) Shen kuo, chinese scientist, wrote of magnetic needle compass and how it improved navigation using true north. Alexander nackham described compasses and their use for navigation. Peter peregrinus de maricourt wrote epistola de magnete, describing the properties of magnets. Al-ashraf discussed the properties of magnets and dry compass. William gilbert published on the magnet and magnetic bodies, and on the great magnet the earth which describes experiments with his model earth (terrella) he concluded the earth was magnetic causing the compasses to point north. Hans christian oersted looks at relationship between electricity and compass needles (electricity can flow through) James clerk maxwell expanded others" insights and unified electricity, magnetism and optics into electromagnetism.
