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 150
nd 1. Then the oblique circle hbai will be the great circle required.For ag may be taken as the projection of the great circle fd. (4c!Therefore a and g are the projections of oppofite points on tfphere. (41 Confequently all circles palling thro G and a will be the reprefenltives of great circles,… … Case i. When the given pole P is in the centre of therimitive circle. Const. The primitive circle will be the greatircle required. (393) Case 2. IVhen the given pole P is in the circumfe-tnce of the primitive circle. Const. Thro the given pole P, draw pe a dia-! leter to the primitive circle. A…
Navigation · Nautical astronomy · Fortification
Internet Archive · Boston Public Library · Public Domain Mark 1.0. Free to use for anything.
