A description of a new instrument or celestial compass : adapted for ascertaining the latitude and longitude at sea, by means of the declination and right ascension of the heavenly bodies : for finding the deviation of the magnetic needle, ... as also, for taking bearings and surveying without magnetic aid

Graydon, George · 1825 · London : Printed by S. and R. Bentley ... · 3 pictures

Compass · Magnetic declination · Navigation

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