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 274
, or Lat. in 25 06 1 of a mile per hour.Qvis PLANE SAILING. 251 Quest. V. A Jhip from the Lat. 48• if N. fails SW. hy S. until, has depreffed the north pole two degrees: what direSt dijlance has Jhtm, and how many miles is Jhe got to the wejlward? To dcprefs the pole two degrees, the fhip mullfjl… … I :of. Cou.T diff. lat.I&ad mm. = 33° 45; rr 120 m. 2,07918 ~ 900 oo 10,00000 Computation.0.0801 144> 3 2,15933 To dep. r C Ship has run 144,3 miles. X And has got to the weftward 80,18 miles As cof. Cou. To diff. lat. So fin. Cou. = 33° 45 0.08015=r 120 m. 2,07918 = 33 45= 80,18 9*74474…
Navigation · Nautical astronomy · Fortification
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