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 154
hro c the centre of apb draw cd at right angles J^to pg. (150) Draw pd, making the Z. cpd =: given deg. andcutting cd in d. {lis) From d with the radius dp, a circle fpe beingdefcribed will be a great circle cutting apb in the an-gle propofed. For, c the centre of apd, is in a line perpendi-cular… … 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…
Navigation · Nautical astronomy · Fortification
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![An illustration from Divina proportione : opera a tutti glingegni perspicaci e curiosi necessaria oue ciascun studioso di philosophia: prospettiua pictura sculptura: architectura: musica: e altre mathematice: suavissima: sotile: e admirabile doctrina consequira: e delecterassi: co[n] varie questione de secretissima scientia (1509)](https://img.insideoutlibrary.com/img/200/ia-divinaproportion00paci-124-341.webp)
