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 191
itive circle. Defcribe the primitive circle, draw the diameter Cd and EF at right angles to one another; and thrc B c defcribe a great circle cad, making the angl bca equal to the given angle c = 125*20 (451 p Defcribe a great* circle bag, cutting the give great circles cfd, cad, in the given… … HereZ.B=E=62052//.az=zt~4$ 31 Sup.Z.cr=cr=54 40 E F = D=I4 21 C\-D =6901 140 19 34°3o ;=:-•; fum 20 09I ~-£diff. = 620 52 0,0506= 48 31 0,1254= 34 3oi 9>7532= 2° °9i 9>5373 Sum of the four Logs 19,4666 A fum gives 320 45^ 9«7333ij Thefup. of its double is 1 i4°29=ai To find the fide ac.…
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-94-67.webp)
