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[Diagram of Gilbert's terella, or earth model, a spherical magnet used to show earth's magnetic qualities; with decorated initial C and surrounding text]

[Diagram of Gilbert's terella, or earth model, a spherical magnet used to show earth's magnetic qualities; with decorated initial C and surrounding text]

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Date

01/01/1600
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Source

Library of Congress
copyright

Copyright info

No known restrictions on publication.

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