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 270
eeking till againft the dift. 98 ftands 82, the neareft will be1,95, figned Dep. at bottom j and here the diff. lat. is 53,73 min» andie courfe is 56* 45. By Construction. r. Defcribe the quadrant Ancp.J. Continue a p, till a b =2 82 m.; and thro b A-aw b b parallel to a n.1. From a with the dift.… … To find the Courfe. I dift. =z 98 m. 8,00877 h Rad ~ 900 oo 10,00000 J-dep. = 82 m. 1,91381 r.) fin. Gou. = 560 47; 9,92258 To find the diff. lat. As Rad — 900 oo 10,00000 To dift. rr 98 m. 1,99123 So cof. Cou. — 56* 47 9,73863 To diff. lat. = 53,69 1,72986 rj.en 500 13 N. — o° 54 N. = 490 19 N.…
Navigation · Nautical astronomy · Fortification
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