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The ready observator : or an infallible method for determining the latitude at sea: By Altitudes of the Sun, At any Time of the Day, either Fore-Noon or After-Noon, Independant of...

by Falck, Nikolai Detlef
Published 1778

printed for J. Mount, T. Page and W. Mount, on Tower Hill

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The ready observator : or an infallible method for determining the latitude at sea: by altitudes of the sun, At any Time of the Day, either Fore-Noon or After-Noon, Independant of...

by Falck, Nikolai Detlef
Published 1771

printed for the author and sold by Wells [i.e. Welles] and Grosvenor, Stationers, No. 11, in Cornhill; by the mathematical instrument-makers, and all booksellers in the sea-port-towns in Great Britain

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