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 154
point in a given projected great circle, to defcribe anothergreat circle tutting the former in an angle of a given number of degrees.Let p be a given point in any great circle apb. I ft. JVhen APB is the primitive circle. Thro the given point p draw a diameter pe, anddraw the diameter ab at right… … (429) For the Z. FPA = angle made by the radii pc, pd. And D being equally diftant from p and e, is the centre fought. 451. Or thus. Make cd equal to the tangent of the given angle to theradius cp. Or. Make pd equal to the fecant of that angle. 452. 2d, IVhen apb is a right circle.Draw a diameter…
Navigation · Nautical astronomy · Fortification
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![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-63-39.webp)
