[Coffin, John Huntington Crane], 1815-1890. [from old catalog] · New York, D. Van Nostrand · leaf 35
ifference of longitude from the point, A, where thetrack crosses the equator to the 1st position, whose latitudeis L, will be D =31 tan C; and to the second position, whose latitude is U, D=M tan C;and we shall have D=D-I>={M-M) tan C; (16) or, when Mr<M, &=Di-DM=(M-M) tan C; since the… … Fig. 8. augmented, difference of latitude. Representing this by mywe have D = m tan C. The relation between these quantities _is represented by a plane right triangle(Fig- 8)> in which C is one of the angles, m = CE, the side adjacent, D = E F, the side opposite. The triangle of Plane Sailing…
Navigation · Nautical astronomy
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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-84-59.webp)