The elements of navigation : containing the theory and practice, with all the necessary tables, to which is added, a treatise of marine fortification ... (1754)
Robertson, J. (John), 1712-1776, Adams, Charles Francis, 1807-1886, former owner. BRL, Adams, John, 1735-1826, former owner. BRL, Boston Public Library) John Adams Library BRL · London : Printed for J. Nourse ... · leaf 155
Therefore, the angle apf is equal to the angle required. S 2 (429)454- I32 454- SPHERICS.P R OB L E M VIII. About any given projeSfedpole, to defcribe a circle at a given difance frombat pole. Or, at a propofed diflance from a given great circle, to defcribe a parallelcircle. Let p be the given… … General Solution. Thro the given pole pand the centre c of the primitive circle, draw a dia-meter, and another de at right angles to it. A ruler on e and p gives p in the primitive circle. Make p a =zp b, equal to the propofed diftancefrom the pole. A ruler on e and a, e and b, will cut the…
Navigation · Nautical astronomy · Fortification
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![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-282-187.webp)