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(170 and A. But the Arc ZA and ZA, or AZ and AZ, would be described, in an open Skie, in about 70 or 61 Seconds. 23. But if a Star seen from the erected Point H, or from the Moon, &c. describes behind the Earth, on the Side where N lies, the Curve DD, which does not reach the Circle whose Diameter is EI; Then conceive continually a right Line passing thro' C and thro' the Center of the Star. And that Line will continually give, very near the Circumference of the Disc oANAP, the Point where the Star appears. Which, by consequence, will not be eclipsed at all: But will all the while seem to slide along near the apparent Limb of the Earth, and to describe a Curve close by the Arc DND. And the like must be understood, if that Curve was situated on the Side of o. 24. And thus, if the Star describes a Curve BKKB or DKKD, passing at a Distance from C smaller than 8' Minutes; Then, an indefinite Line, drawn from C thro' the Star, or thro' any other the like Lucid Point, will always shew, near the Circle oANAP, the apparent Place, or the two opposite apparent Places of the Star, &c. in reference to the erected Point H; by [[strikethrough]]Ra[[/strikthrough]]^[[re]]ason of the Refraction in our Atmosphere. And all that while, the Star being in a right Line drawn from C to the Circumference, will seem to slide along very near to the apparent Limb of the Earth; and even, f[[strikethrough]]rom[[/strikethrough]]or some critical Moments, or Circumstances, in a retrograde Manner; as when a right Line drawn from C to D cuts the Curve DK. And as soon as the Star comes to K, or to the right Line YKCv, at about 8' Minutes from the Center of the Earth, then the