Tables for Facilitating the Calculations of Nautical Astronomy,: And Particularly of the Latitude of a Ship at Sea from Two Altitudes of the Sun, and that of the Longitude from the Distances of the Moon from the Sun Or a Star; Containing the Natural Versed-sines to Every 10 Seconds, and the Logarithmic-sines, Double-sines, Versed-sines, &c. to Every Minute from 0 to 180 Degrees; and Several Other Tables, Useful in Astronomy and Navigation
Printed, at the Oriental Press, by Wilson & Company Wild Court, for R. Faulder, New Bond-Street., 1801 - Nautical astronomy - 383 pages
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Page 27 - Add the sun's declination to the elevation of the equator, if the latitude of the place, and the declination of the sun, are both on the same side.