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 163
S4>- SPH-ERI C S. … 48o. THEOREM X. .; ■ /;; right angled fpheric triangles (bac), the hypothenufe (bc) is lefs than90s tvbcn the hgs (ab, ac) are of a like kind: But the hypothenufe it \greater than 90% when the legs are of different kinds. . 481. When the legs ab, ac, are both lefs than 90°,~£ \ Dem. In ba, ac…
Navigation · Nautical astronomy · Fortification
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