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 77
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… … Operation, ift. Bife& any two angles fab,cba, with the lines AG, bg, and the point cwhere they interfecl one another will be the centreof the polygon. 2d. A circle defcribed from G, with the radiusga, will circumfcribe the given polygon. 179. Or, 1 ft. BifecT: any two fides f e, ED, in the…
Navigation · Nautical astronomy · Fortification
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