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 504

An illustration from The elements of navigation : containing the theory and practice, with all the necessary tables, to which is added, a treatise of marine fortification ..., 1754, leaf 504 — urth quadrant; therefore the longitude is greatelthan 270s, and muft be taken from 3600, to give the hypothenufe =£©■Herein the declination is fouth, and the right afcenfion =c= a, found by theproportion, muft be taken from 3600, to give the right afcenfion from <Y\ 977. At equal diftances from… … P1:3X. 9 \ V/ -/^~--/ / V r ;ill Ilk

Navigation · Nautical astronomy · Fortification

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The elements of navigation : containing the theory and practice, with all the necessary tables, to which is added, a treatise of marine fortification ... (1754)

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