Descartes, René, Renati Des-Cartes principia philosophiae
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              LXX.
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              Idem de materiâ ſe­
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              cundi elementi non
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              poſſe intelligi. </s>
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              15</s>
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              20</s>
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              25</s>
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            <figure id="fig21" number="21">eg</figure>
            <figure id="fig22" number="22">ſd</figure>
            <figure id="fig23" number="23"/>
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              Praeterea etiam conſiderare oportet particulas ſe­
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              cundi elementi quae volvuntur circa centrum L, non
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              solùm habere vim recedendi ab iſto centro, ſed etiam
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              perſeverandi in ſuà celeritate; qu duo ſibi quodam­
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              modo adverſantur: quia, dum gyrant in vortice L, à
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              vicinis aliis vorticibus, qui ſupra & infra planum
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              hujus figurae intelligendi ſunt, intra certos terminos
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              cohibitae, non poſſunt evagari verſus B, quin tardiùs
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              moveantur inter L & B, quàm inter L & alios vicinos
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              vortices, extra planum hujus figurae intelligendos; &
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              quidem tantò tardiùs, quanto ſpatium L B erit majus. </s>
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              Nam, cùm circulariter moveantur, non poſſunt plus
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              temporis impendere in tranſeundo inter L & iſtos alios
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              vortices, quàm inter L & B. </s>
              <s>Atque idcirco, vis quam
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              habent ad recedendum à centro L, efficit quidem ut
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              nonnihil evagentur verſus B, quia ibi occurrunt par­
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              tibus circumpolaribus vorticis S, quae non difficulter
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              ipſis cedunt; ſed ex adverſo vis quam habent, ad reti­
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              nendam celeritaltem ſui motûs impedit ne uſque adeò
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              evagentur, ut ad S pereniant. </s>
              <s>Quod idem non habet
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              locum in materiâ primi elementi: etſi enim in hoc
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              conſentiat cum particulis ſecundi, quòd ſimul cum
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              ipſis gyrando, recedere conetur à centris vorticum in
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              quibus continetur; in eo tamen maxim diſſentit, quòd
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              non opus ſit ut quidquam de ſuà celeritate remittat,
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              cùm ab iſtis centris recedit, quia ubique ferè aequales
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              invenit vias, ad motus ſuos continuandos: nempe in
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              anguſtiis angulorum, qui à globulis ſecundi elementi
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              non implentur. </s>
              <s>Quamobrem non dubium eſt, quin ma­
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              teria iſta primi elementi continuò fluat verſus S, per
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              partes polis A & B vicinas, non modò ex vorticibus K </s>
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