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History
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Intensity
Intensity
Inclination
Inclination
Declination
Declination
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A solenoid (electromagnet), a coil of wire with an electric current through it
A solenoid (electromagnet), a coil of wire with an electric current through it
One of the first drawings of a magnetic field, by René Descartes, 1644, showing the Earth attracting lodestones. It illustrated his theory that magnet
One of the first drawings of a magnetic field, by René Descartes, 1644, showing the Earth attracting lodestones. It illustrated his theory that magnetism was caused by the circulation of tiny helical particles, "threaded parts", through threaded pores in magnets.
Hans Christian Ørsted, Der Geist in der Natur, 1854
Hans Christian Ørsted, Der Geist in der Natur, 1854