Salusbury, Thomas
,
Mathematical collections and translations (Tome I)
,
1667
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towards the Sun it is bounded by the lucid horns of the Moon,
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and on the other part, its confining term is the obſcure tract of the
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twilight; whoſe relation makes us think the candor of the Moons
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Diſcus
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to be ſo much the clearer; the which happens to be
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fuſcated in the oppoſite part, by the greater clarity of the
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cents; but if this modern Author had eſſaied to make an
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poſition between the eye and the primary ſplendor, by the ridg of
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ſome houſe, or ſome other ſcreen, ſo as to have left viſible only
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the groſe of the Moon, the horns excluded, he might have ſeen
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it all alike luminous.</
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Its all one
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ther opinions be
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new to men, or men
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new to opinions.
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*
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Conteſtare
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falſly
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rendered in the
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Latine Tranſlation
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content are.
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The ſecondary
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light of the Moon
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appears in form of
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a Ring, that is to
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ſay, bright in the
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extreme
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rence, and not in
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the midſt, and why.
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The may to
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ſerve the
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ry light of the
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Moon.
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>SIMPL, I think, now I remember, that he writes of his
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making uſe of ſuch another Artifice, to hide from us the falſe
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Incidum.
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>SALV. Oh! how is this (as I believed) inadvertency of his,
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changed into a lie, bordering on raſhneſſe; for that every one
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may frequently make proof of the contrary. </
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>That in the next
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place, at the Suns Eclipſe, the Moons
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Diſcus
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is ſeen otherwayes
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than by privation, I much doubt, and ſpecially when the
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clipſe is not total, as thoſe muſt neceſſarily have been, which
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were obſerved by the Author; but if alſo he ſhould have
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red ſomewhat of light, this contradicts not, rather favoureth our
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opinion; for that at ſuch a time, the whole Terreſtrial
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ſphere illuminated by the Sun, is oppoſite to the Moon, ſo that
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although the Moons ſhadow doth obſcure a part thereof, yet this
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is very ſmall in compariſon of that which remains illuminated.
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>That which he farther adds, that in this caſe, the part of the
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limb, lying under the Sun, doth appear very lucid, but that
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which lyeth beſides it, not ſo; and that to proceed from the
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ming of the ſolar rayes directly through that part to the eye, but
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not through this, is really one of thoſe fopperies, which diſco
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ver the other fictions, of him which relates them: For if it be
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requiſite to the making a ſecondary light viſible in the lunar
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cus,
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that the rayes of the Sun came directly through it to our
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eyes, doth not this pitiful Philoſopher perceive, that we ſhould
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ver ſee this ſame ſecondary light, ſave onely at the Eclipſe of the
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Sun? </
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>And if a part onely of the Moon, far leſſe than half a
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gree, by being remote from the Suns
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Diſcus,
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can deflect or
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viate the rayes of the Sun, ſo that they arrive not at our eye;
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what ſhall it do when it is diſtant twenty or thirty degrees, as it is
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at its firſt apparition? </
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<
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>and what courſe ſhall the rayes of the Sun
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keep, which are to paſſe thorow the body of the Moon, that
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they may find out our eye? </
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>This man doth go ſucceſſively
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dering what things ought to be, that they may ſerve his purpoſe,
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but doth not gradually proceed, accommodating his conceits to
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the things, as really they are. </
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<
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>As for inſtance, to make the light </
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