Dipping needle

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a magnetic needle suspended at its center of gravity, and moving freely in a vertical plane, so as to indicate on a graduated circle the magnetic dip or inclination.
See under Dipping.

See also: Dipping, Needle

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Ronald's black bag contains two essential tools - a pelorus, for taking bearings, and a dipping needle, for measuring magnetic fields.