The elements of astronomy, physical and geometrical (1715)
Gregory, David, 1659-1708, Halley, Edmond, 1656-1742. Synopsis of the astronomy of comets, Adams, John, 1735-1826, former owner. BRL, Boston Public Library (John Adams Library) BRL · London : Printed for J. Nicholson ... and sold by J. Morphew ... · leaf 412
e fame (by Prop. 47.) with the ratio of theSines of the diftances obferved from the Ver-tex. There are therefore given the ratio of^the Sines of the whole Angles PMNy PNM,namely the fame with the ratio of the Sines ofthe known-Arcs FN^ FM -y alfo the ratio of theSines of the Angles LAIN, LJNTMtaken… … j^^ Book IL 0/ A s t R o N d M Y; 353 tNM will be known, (by the preced. Lemma.)Again, in the Triangle MP Nj the Sides PM^fN being given, with the Angles fubtended bythem^ the Bafe MJST is foLind. And laftly, inthe Triangle LMNy the Bafe MNy and theAngles adjacent LMNy LNM being given^the Sides LM^…
Astronomy
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