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. </s>
              <s>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. </s>
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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. </s>
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              15</s>
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              30</s>
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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. </s>
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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. </s>
              <s>(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.) </s>
              <s>Ac reliqua materia
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