Descartes, René
,
Renati Des-Cartes principia philosophiae
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maculas, ut & totum aetherem ipſis circumſuſum, quo
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niam ejus partes ad motum minùs aptae ſunt quàm
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globuli ſecundi elementi, ad tertium elementum re
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ferimus ". </
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C.
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Quomodo ex ipſis aether
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circa Solem & ſtella
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generetur. </
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>Huncque
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aetherem & iſtas ma
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culas ad tertium ele
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mentum referri. </
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25</
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30</
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Sed verò macularum productio vel diſſolutio à tam
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minutis & tam incertis cauſis dependet, ut minimè ſit
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mirandum, ſi quando nullae prorſus in Sole appareant,
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vel ſi è contrà nonnunquam ſint tam multae, ut totum
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ejus lumen obſcurent. </
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>Ex hoc enim quòd pauca aliqua
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ex ramentis primi elementi ſibi invicem adhaereſcant,
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ſit unius maculae rudimentum, cui facilè poſtea plura
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alia junguntur, quae, niſi in priora illa impingendo
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partem ſuae agitationis amitterent, ſibi mutuò non
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poſſent adhaerere. </
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CI.
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Macularum productio
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nem & diſſolutionem
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à cauſis valde incertis
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pendere. </
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5</
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Notandumque eſt maculas iſtas, cùm primum ge
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nerantur, eſſe corpora molliſſima & rariſſima, ideòque
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facilè frangere impetum ramentorum primi elementi,
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quae in ipſas impingunt, & illa ſibi adjungere. </
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>Paula
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tim autem poſtea interiorem earum ſuperficiem, con
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tinuo motu ſubſtantiae ſolaris cui contigua eſt, non
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tantùm abradi & perpoliri, ſed etiam condenſari &
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indurari, aliâ interim earum ſuperficie, quae coelo ob
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verſa eſt, molli & rarâ remanente. </
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>Ideoque ipſas non
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facilà diſſolvi, ex eo quòd materia Solis interiorem
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earum ſuperficiem lambat, niſi ſimul etiam earum oras
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circumfluat & tranſcendat, ſed contrà potiùs ſemper
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augeri, quamdiu iſtae earum orae, ſupra Solis ſuperfi
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ciem eminentes, ejus materiae occurſu non denſantur. </
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Hincque poteſt contingere, ut aliquando una & eadem
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macula ſupra totam ſuperficiem alicujus ſideris ſe </
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