Variation compas, for observations of the Aurora, 19th century.
2 9 c m
40cm
actual image size: 32cm x 21cm

Variation compas, for observations of the Aurora, 19th century.

© Science Museum / Science & Society Picture Library

Description

Variation compas with a 12 inch needle, used for observations of the effect of the Aurora on the magnetic needle by the Royal Society in the 19th century.
 

Image Ref.

10288942
 

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