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British, circa 1880.

LATE 19TH CENTURY LACQUERED BRASS DIP NEEDLE

Unsigned. Presented on a brass tripod base with leveling screws, supporting 360 degrees graduating circle, the central shaft, supporting pivoted graduating circle, enclosing dip needle, with plummet and string.
Height 11.5". Width 6.25".

  • Provenance: A dip needle is an instrument to measure the number of degrees that the north reading end of a freely suspended magnet is magnetically attracted downwards from the local horizontal plane. In other words, it measures the vertical component of the earth's magnetic field in the same way a compass needle indicates the horizontal component.

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