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 171
rad :.tan. cd :: cof. cb : cof. (BCD,call it) n.Therefore cot. AC : cot. cb : : cof. m. : cof. n. (2$) Or cot. fide adj. giv. /_ : cot. oth. fide : : cof m : caf. n.Jnd is like the fide eppofite the given angle, if that angle is acute ;But unlike that fide, if. the given angle is obtufe. <rr ~*i… … 3d. ft , SPHERICS. 49 3d. To find the other ftde AB. Now Rad : cof. z.cab : : tan. AC : tan. (ad, call it) M. (2d. 497)Or Rad : cof. giv. ang. : : tan. adj. fide : tan. (of a fourth ~) M.Acute ^ if the ang. and its adj. fide are^alike ; but obtufe if unlike.But cof. cd : Rad : : cof. ac : cof. (ad…
Navigation · Nautical astronomy · Fortification
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