The variation and deviation of the compass rectified by azimuth and altitude tables from the equator to the latitude of eighty degreesalso 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
Paul Cameron, nautical instrument maker ...1859-01-01
