Unifilar variation compass and magnetometer

Unifilar variation compass and magnetometer, used by Capt. Barnett in 1841

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Unifier variation compass and magnetometer

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Category:: Terrestrial Magnetism

Object Number:: 1876-798

type:: compasses (direction indicators)

taxonomy:

measuring devices
measuring devices

credit:: Meteorological Office

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Unifilar variation compass and magnetometer

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