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 467
ill cutthe Curve in the points fought L, L. And thegreateft Ordinate i^L is a third proportional tothe right linesGi^and/**D, in the firft of them^or a fourth proportional to the right lines G Z^,.G^, and ^i^ in both. If DE remains in, being, the Ordinate fromthe Focus FP is equal to the leffer… … Book III. of Astronomy. 401 Section II* Concerning the determining the Orbit of theEarth, and the Theory of the Earth feenfrom the Sun, or of the Sun feen from theEarth. pROPOStTION I5C. TO define hjf ohfer^uation^ the Sfecies of the Orhlt of, the, Earth, and the Fo/ttion of its Axs^ as. alfo…
Astronomy
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