Descartes, René, Renati Des-Cartes principia philosophiae

Table of figures

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              ut navis, nullis ventis nec remis impulſa, nulliſque
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              anchoris alligata, in medio mari quieſcit, etſi fortè
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              aquae ingens moles, occulto curſu delabens, ipſam
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              ſecum ſerat. </s>
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              XXVI.
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              Terram in coelo ſuo
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              quieſcere, ſed nihilo­
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              minus ab eo deferri. </s>
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              25</s>
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              Et quemadmodum caeteri Planetae in hoc cum
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              conveniunt, quòd ſint opaci & radios Solis reflectant,
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              non immeritò arbitrabimur illos etiam in hoc ei
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              ſimiles eſſe, quòd unuſquiſque quieſcat in eâ coeli
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              regione in quâ verſatur; quòdque omnis variatio ſitûs
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              quae in illis obſervatur, ex eo tantúm procedat,
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              omnis materia coeli, quae illos continet, moveatur. </s>
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              XXVII.
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              Idemque ſentiendum
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              eſſe omnibus Pla­
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              netis. </s>
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              5</s>
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              10</s>
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              Hîcque oportet eorum meminiſſe quae de naturâ
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              motûs ſuprà dicta ſunt a: nempe illum quidem (ſi pro­
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              priè loquamur, & ſecundúm rei veritatem), eſſe tan­
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              túm tranſationem unius corporis ex vicinià
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              corporum, quae ipſum immediat contingunt & tan­
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              quam quieſcentia ſpectantur, in viciniam aliorum. </s>
              <s>Sed
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              ſaepe etiam ex uſu vulgi actionem omnem, quâ corpus
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              aliquod ex uno loco in alium migrat, motum vocari;
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              &shoc ſenſu dici poſſe, eandem rem eodem
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              moveri ac non moveri, prout ejus locum variè deter­
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              minamus. </s>
              <s>Unde ſequitur nullum in Terrâ, nec etiam
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              in aliis Planetis, motum propriè dictum reperiri: quia
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              non transferuntur ex viciniâ partium coeli quae illos
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              immediatè contingunt, quatenus iſtae partes coeli
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              immotae conſiderantur. </s>
              <s>Ad hoc enim deberent ab
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              omnibus ſimul ſejungi, quod non ſit ſed quia materia
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              coeli fluida eſt, nunc unae ejus particulis, nunc aliae, à
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              Planetâ quem contingunt removentur, idque per mo­
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              tum qui illis tantum tribui debet, non autem Planetae:
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