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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 380

An illustration from The elements of astronomy, physical and geometrical, 1715, leaf 380
be the Parallel fought. Thr<^l^the point ^, where it interfeds C R, fuppofe Ithe great CirclQ A\^HO to be drawn meeting^^the Horizon HO in O and H, which cuts theEquator E ^in ^, fo as that the angle ^^4^£i5 equal to the angle PED or TEK. Andtherefore (by the preced. Lemma) the arc E3is fimilar…

Astronomy

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