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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.

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Thomas a Kempis

... donated to the city of Cologne in 1838, contained at the time 400 different editions. De Backer (Essai, ut inf.) enumerates 545 Latin and about 900 French editions. ...