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 69
A. 153. PROBLEM VI. At a given point D, to make right lined angle equal t$ a given right linedtngle ABC. Operation, ift. From b and d with one radiusdefcribe the arcs a c, e f. 2d. Lay tho- diftance a c oil the arc e f from F*. to £. 3d, Lines drawn from d, thro* e and f, will formthe angle edf… … *54. PR.O*. GEOMETRY. 4? c B B. •s* J54. PROBLEM VII. To draw a line parallel to a given right line AB. When the parallel line is to pafs thro a given point c. Operation, ift. Take any point d in the line i-g A B ; and from that point with the radius d c, cut *^ AB in E, and from e defcribe an arc…
Navigation · Nautical astronomy · Fortification
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