Salusbury, Thomas
,
Mathematical collections and translations (Tome I)
,
1667
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nor eſſaies to move whither it is impoſſible to arrive. </
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>And if any
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one ſhould yet object, that albeit the right line, and
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ly the motion by it is producible
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in infinitum,
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that is to ſay, is
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terminate; yet nevertheleſs Nature, as one may ſay, arbitrarily
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hath aſſigned them ſome terms, and given natural inſtincts to
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its natural bodies to move unto the ſame; I will reply, that this
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might perhaps be fabled to have come to paſs in the firſt Chaos,
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where indiſtinct matters confuſedly and inordinately wandered;
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to regulate which, Nature very appoſitely made uſe of right
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tions, by which, like as the well-conſtituted, moving, diſdorder
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themſelves, ſo were they which were before depravedly diſpoſed
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by this motion ranged in order: but after their exquiſite
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tion and collocation, it is impoſſible that there ſhould remain
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tural inclinations in them of longer moving in a right motion,
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from which now would enſue their removal from their proper and
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natural place, that is to ſay, their diſordination; we may
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fore ſay that the right motion ſerves to conduct the matter to erect
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the work; but once erected, that it is to reſt immoveable, or if
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moveable, to move it ſelf onely circularly. </
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>Unleſs we will ſay
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with
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Plato,
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that theſe mundane bodies, after they had been made
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and finiſhed, were for a certain time moved by their Maker, in a
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right motion, but that after their attainment to certain and
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terminate places, they were revolved one by one in Spheres,
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ſing from the right to the circular motion, wherein they have
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been ever ſince kept and maintained. </
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>A ſublime conceipt, and
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worthy indeed of
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Plato
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: upon which, I remember to have heard
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our common friend the ^{*}
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Lyncean Academick
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diſcourſe in this
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ner, if I have not forgot it. </
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>Every body for any reaſon
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ted in a ſtate of reſt, but which is by nature moveable, being ſet
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at liberty doth move; provided withal, that it have an
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tion to ſome particular place; for ſhould it ſtand indifferently
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fected to all, it would remain in its reſt, not having greater
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ducement to move one way than another. </
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>From the having of
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this inclination neceſſarily proceeds, that it in its moving ſhall
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tinually increaſe its acceleration, and beginning with a moſt ſlow
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motion, it ſhall not acquire any degree of velocity, before it
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ſhall have paſſed thorow all the degrees of leſs velocity, or
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ter tardity: for paſſing from the ſtate of quiet (which is the
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finite degree of tardity of motion) there is no reaſon by which
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it ſhould enter into ſuch a determinate degree of velocity, before
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it ſhall have entred into a leſs, and into yet a leſs, before it entred
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into that: but rather it ſtands with reaſon, to paſs firſt by thoſe
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degrees neareſt to that from which it departed, and from thoſe to
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the more remote; but the degree from whence the moveable
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began to move, is that of extreme tardity, namely of reſt. </
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