Descartes, René
,
Renati Des-Cartes principia philosophiae
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contenti, ſimul deſcendant, reliquis immotis. </
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<
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dem notare licet duos globos 2, 2, poſtquam aliquan
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tulum ſequuti ſunt globum i deſcendentem, ſe mutuò
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impedire ne ulteriùs pergant. </
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ſecundi elementi locum non habet: cùm enim in per
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petuo ſint motu, quamvis aliquando poſſit contingere,
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ut eodem plan modo ſint diſpoſiti ac globi plumbei
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in hac figurâ depicti, hoc non niſi per minimum tem
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poris pundum, quod inſtans vocant, durare poteſt,
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&sideò continuitatem earum motûs non interrumpit. </
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Ac proeterea notandum eſt vim luminis, non in aliquâ
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motûs duratione conſiſtere, ſed tantummodo in preſ
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ſione a ſive in primâ preparatione ad motum, etſi fortè
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ex eâ motus ipſe non ſequatur. </
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LXIII.
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Globulos materiae cae
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leſtis ſe mutuò non
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impedire in iſto co
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natu. </
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Ex quibus clarè percipitur, quo pacto actio illa,
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quam pro luce accipio, à Solis vel cujuſlibet Stellae
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fixae corpore in omnes partes aequaliter ſe digundat;
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& in minimo temporis momento ad quamlibet diſtan
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tiam extendatur; & id quidem ſecundùm lineas rectas,
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non à ſolo corporis lucidi centro, ſed etiam à qui
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buſlibet aliis ejus ſuperficiei punctis eductas. </
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reliquae omnes lucis proprietates deduci poſſunt. </
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Quodque fortè multis paradoxum videbitur, haec om
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nia ita ſe haberent in materiâ coeleſti, etiamſi nulla
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planè eſſet vis in Sole, aliove aſtro circa quod gyratur:
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adeò ut, ſi corpus Solis nihil aliud eſſet quàm ſpatium
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vacuum nihilominus ejus lumen non quidem tam
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forte, ſed quantum ad reliqua, non aliter quàm nunc
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cerneremus, ſaltem in circulo ſecundùm quem ma
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teria coeli movetur; nondum enim hîc omnes ſphaerae </
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