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
ill circumfcribe the given polygon. 179. Or, 1 ft. BifecT: any two fides f e, ED, in the points h and 1 jand draw h g, 1 g, at right angles toFE, ed; then the point g wherethey interfecl: each other, will b^ the centre of the polygon. id. A circle defcribed from G, with the radius g h, will be… … A 6 B equal to the given angle C.This depends on art. ao8, 209, 215, Operation, ift. Make an angle baf equalto the given angle c. (1^3^ 2d. From H, the middle of ab, draw h 1 atright angles to ab, and from a, draw ai at rightangles to af, cutting h 1 in 1. 3d. From 1, with the radius ia, defcribe…
Navigation · Nautical astronomy · Fortification
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