Observed Changes in the Angle between the Magnetic Axis and the Geometric Axis of a Bar Magnet

Details Observed Changes in the Angle between the Magnetic Axis and the Geometric Axis of a Bar Magnet Observed Changes in the Angle between the Magnetic Axis and the Geometric Axis of a Bar Magnet

May 1950

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1950natur.165r.726v&link_type=abstract

Nature, Volume 165, Issue 4201, pp. 726-727 (1950).

Physics

Scientific paper

THE standard instrument for declination measurements at the Magnetic Observatory, Hermanus, is an Askania standard magnetometer-theodolite of the Schmidt type. The two declination magnets supplied with the instrument are in the form of solid steel cylinders of length 7 cm. and diameter 1.2 cm., fitted with plane mirrors at both ends. The telescope is of the usual `auto-collimating' type. Provided the angle between the magnetic axis and the normal to a particular mirror surface remains constant, the difference between the `magnet erect' and `magnet inverted' readings (E-I) provides a ready control during observations.

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