Terrella
The terrella, or little earth, was an invention of William Gilbert in the 16th century. Ground from a lodestone, it simulated the magnetic dip of the Earth.
Related Topics:
William Gilbert - 16th century - Lodestone - Magnetic dip - Earth
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Kristian Birkeland used a magnetised terrella to model the Earth's polar aurora.
Related Topics:
Kristian Birkeland - Polar aurora
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