Descartes, René, Renati Des-Cartes principia philosophiae

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              ejuſdem receſûs, phaſium Lunae, Eclipſium, ſtationum
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              &sretrogradationum quae apparent in Planetis, prae­
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              ceſſionis aequinodiorum, variationis in obliquitate
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              Eclipticae, ac ſimilia: facil enim ab illis, qui vel pri­
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              ma elementa Aſtronomiae didicerunt) intelligentur a.
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              XXXVII.
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              Phaenomena omnia per
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              hanc hypotheſin fa­
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              cillimè intelligi. </s>
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              5</s>
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              Sed breviter adhuc dicam, quo pacto ex hypotheſi
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              Braheanâ, quam vulgà jam admittunt illi omnes qui
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              Copernicanam repudiant, plus motús Terrae quàm per
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              hanc tribuatur. </s>
              <s>Primò, manente Terrâ juxta eorum
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              opinionem immobili, neceſſe eſt ut totum coelum,
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              unà cum ſtellis, circa ipſam ſingulis diebus volvatur:
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              quod intelligi non poteſt, quin ſimul intelligatur fieri
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              tranſlationem omnium partium Terrae, ex viciniâ par­
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              tium coeli quas tangunt in viciniam aliarum; cúmque
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              haec tranſlatio ſit reciproca, ut ſuprà dictum eſt b, &
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              eadem plan vis ſive actio ad illam requiratur in Terrâ
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              atque in coelo, nulla ratio eſt cur, propter ipſam,
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              coelo potiús quàm Terrae motum tribuamus. </s>
              <s>Quinimò,
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              juxta ſuperiús dicta, Terrae duntaxat eſt tribuendus:
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              quia ſit ſecundúm totam ejus ſuperficiem, non
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              eodem modo ſecundúm totam ſuperficiem coeli, ſed
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              tantúm ſecundúm partem concavam, Terrie conti­
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              guam, quae ad convexam comparata perexigua eſt. </s>
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              Nec refert ſi dicant, ſe non tantúm putare concavam
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              coeli ſtellati ſuperficiem à terrâ ſeparari, ſed
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              etiam convexam ab alio coelo illud ambiente, nempe
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              à coelo cryſtallino vel Empyreo; atque hanc eſſe ratio­
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              nem cur illum motum coelo potiús tribuant quàm
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              terrae. </s>
              <s>Nullum enim haberi poteſt argumentum, quo </s>
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