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 528
e of thatcomet ? Construction.On the plane of the folftitial colure, where p and e are the poles ofthe equator and ecliptic, put the ftar at a by its right afcenfion and de-clination : About p and a defcribe fmall circles, at the diftances of thecomet from thofe points, their interfec~tion c gives… … ,ffiT ra//L Tajf 484. ASTRONOMY. 485 Computation. In the triangle apc. Given the * s co-decl. pa = 54°oo comets co-decl. pc = 43 00 their diftance AC == 49 00 Req.com.rt.afc.fr. *Z_apc= 65 48Then 65°48/—45°oo/ = 20°48.And90°oo/—20°48=69°i 2=:cpe. In the triangle epc.Given comets co-decl. pc =…
Navigation · Nautical astronomy · Fortification
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