Descartes, René
,
Renati Des-Cartes principia philosophiae
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ſimiles ſunt illis maculis quae in Solis ſuperficie con
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ſpici ſolent. </
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<
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>Eâdem enim ratione, quà videmus aquam
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liquoreſque alios quoſcunque, cùm igni ad moti effer
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veſcunt, atque aliquas particulas diverſae à reliquis
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naturae ac minùs ad motum aptas in ſe continent,
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denſam ſpumam ex particulis iſtis conflatam emittere,
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quae ſupra ipſorum ſuperficiem natare, figuraſque ad
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modum irregulares & mutabiles habere ſolet: ita per
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ſpicuum eſt materiam Solis, utrimque ex ejus polis
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verſùs eclipticam ebullientem, debere particulas
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ſtriatas, aliaſque omnes quae facilè ſibi mutuò adhae
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rent, ac difficulter communi ipſius motui obſequuntur,
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ex ſe tanquam ſpumam expellere. </
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XCIV.
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Quomodo ex iis macu
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lae in Solis vel ſtella
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rum ſuperficie gene
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rentur. </
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Atque hinc a facile eſt cognoſcere, cur Solis maculae
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non ſoleant apparere circa ejus polos, ſed potiùs
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partibus eclipticae vicinis; & cur figuras habeant
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valde varias & incertas; & denique cur in orbem circa
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Solis polos, ſi non tam celeriter quàm ejus ſubſtantia,
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ſaltem ſimul cum eà parte coeli quae illi proxima eſt,
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moveantur.
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XCV.
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Hinc cognoſci praeci
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puas harum macula
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rum proprietates. </
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At verò, quemadmodum plerique liquores eandem
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ſpumam, quam initio efferveſcendo emittunt, rurſus
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poſtea diutiùs ebulliendo reſorbent & abſumunt: ita
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putandum eſt, eàdem facilitate quà materia macula
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rum è corpore Solis emergit, atque in ejus
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cumulatur, paulò pòſt etiam imminui, & partim in
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ejus ſubſtantiam refundi, partimque per coelum vici
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num diſpergi. </
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>(Non enim ex toto Solis corpore, ſed
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tantùm ex materià quae recens in illum ingreſſa eſt,
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maculae iſtae formantur.) </
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<
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