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 76
ds a, b, of the line ab, make an-gles a b c, b a d, equal to the angle of the polygon. 3d. Make ad, b c, each equal to ab. 4th. At the points c, d, make angles equal tothat of the polygon as before; and let the fides in-cluding thofe angles be each equal to ab j and thusproceed until the polygon is… … In figures of an even number of fides, having drawn half the number,AD, ab, b c, c f, by means of the angles ; the remaining fides may befound by drawing thro* the points D and F, the lines de, fh, paralleland equal to their oppofite fides C F, adj and fo of the reft. 178. 5* GEOMETRY. 178. PROBLEM…
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-96-190.webp)
