The variation and deviation of the compass rectified by azimuth and altitude tables from the equator to the latitude of eighty degrees : also by azimuth and altitude tables are found the true position of a ship at sea, the error of the chronometer, and the longitude : likewise, a treatise on magnetism and the deviations of the compass in iron ships and the method of observing and correcting them by magnets /
Cameron, Paul.
Glasgow : The Author,
[1859]
Spine title: Compass variations.
Includes bibliographical references.
Compass.
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