Modelle des Kosmos: Modelle der Erde

Modelle des Kosmos: Modelle der Erde

Declination Compass
Instrument for determining the deviation of the compass needle from the North-South direction, Cristoforo Scalvino, Milan, early nineteenth century

Declination compasses and associated inclination compasses are used to create maps documenting the magnetic field of the Earth and its changes.

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