Descartes, René
,
Renati Des-Cartes principia philosophiae
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cúm quis ex unà navi alias eminus reſpicit inter ſe
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ſitum mutantes, ſaepe poteſt dubitare quibuſnam ex
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illis, & annon etiam ſuae, motus (à quo procedit iſta
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ſitûs variatio) ſit tribuendus: ita errores Planetarum,
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è Terrâ conſpecti, tales apparent, ut ex ipſis ſolis co
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gnoſci non poſſit, quibuſnam corporibus ſint propriè
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tribuendi. </
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>Cúmque ſint valde inaequales & implicati,
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non facile eſt illos explicare, niſi ex variis modis, qui
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bus poſſunt intelligi, unum aliquem eligamus, ſecun
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dúm quem ipſos fieri ſupponamus. </
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inventae ſunt ab Aſtronomis tres diverſae hypotheſes,
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hoc eſt, poſitiones, quae non ut verae, ſed tantúm ut
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phaenomenis explicandis idoneae, conſiderantur. </
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XIV.
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Fixas eandem ſemper
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à ſe mutuò diſtantiam
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retinere, non autem
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Planetas. </
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apparentias per va
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rias hypotheses poſſe
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explicari. </
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Harum primò eſt Ptolemaei, quae quoniam multis
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phaenomenis adverſatur (ut inprimis incremento &
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decremento luminis, quod in Venere ſicut in Lunâ
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obſervatur), jam vulgò ab omnibus Philoſophis rejici
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ſolet, ideoque hîc à me praetermittetur a. </
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XVI.
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Hypotheſin Ptolemaei
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apparentiis non ſatis
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facere. </
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Secunda eſt Copernici, & tertia Tychonis Brahe:
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quae duae, quatenus ſunt tantúm hypotheſes, eodem
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modo phaenomenis ſatisfaciunt, & non magna inter
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ipſas differentia eſt, niſi quòd illa Copernici aliquantò
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ſimplicior ſit & clarior; adeò ut Tycho non habuerit oc
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caſionem illam mutandi, niſi quia non hypotheſin dum
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taxat, ſed ipſam rei veritatem explicare conabatur. </
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XVII.
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Hypotheses Copernici
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&sTychonis non dif
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ferre in quantum hy
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potheſes. </
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Quippe, cùm Copernicus non dubitâſſet motum
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Terrae tribuere, hoc Tycho tanquam in Phyſicâ valde
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abſurdum, atque à communi hominum ſenſu alie
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num, voluit emendare; ſed, quia veram motús natu
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ram non ſatis conſideravit, verbo tantúm aſſeruit </
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