Descartes, René, Renati Des-Cartes principia philosophiae

Page concordance

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              riùs pergant verſus H, ubi paullatim agitationem ſuam
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              deponunt, ſicque vertuntur in fumum. </s>
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              XCVII.
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              Cur ejus flamma ſit
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              acuminata, & fumus
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              ex eâ egrediatur. </s>
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              25</s>
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              Qui ſumus nullum in toto ae
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              re locum reperiret, quia
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              nullibi vacuum eſt, niſi, prout egreditur ex flammâ,
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              tantundem ae
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              ris verſus
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              circu­
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              lari motu regrederetur. </s>
              <s>Nempe, dum
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              fumus aſcendit ad H, pellit inde ae
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              ­
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              rem verſus I & K, qui ae
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              r, lambendo
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              ſummitatem candelae B ac radices el­
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              lychnii F, ad flammam accedit,
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              alendae inſervit. </s>
              <s>Sed ad hoc non ſuſ­
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              ficeret, propter partium ſuarum te­
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              nuitatem, niſi multas cerae particulas,
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              calore ignis agitatas, per ellychnium
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              ſecum adduceret. </s>
              <s>Atque ita
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              debet aſſiduè renovari ut conſerve­
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              tur, & non magis eadem manet, quàm flumen ad quòd
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              novae ſemper aquae accedunt. </s>
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              XCVIII.
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              Quomodo ae
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              r & alia
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              corpora flammam
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              alant. </s>
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              5</s>
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              10</s>
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              15</s>
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            <figure id="fig77" number="80"/>
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              Motum autem circularem ae
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              ris & ſumi licet expe­
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              riri, quoties magnus ignis in cubiculo
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              exci­
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              tatur. </s>
              <s>Si enim cubiculum ita ſit clauſum, ut praeter
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              tubum camini per quem fumus exit, unum tantùm ali­
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              quòd foramen ſit apertum, ſentietur continuà magnus
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              ventus, per hoc foramen ad focum tendens, in locum
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              fumi abeuntis a.
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              XCIX.
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              De motu ae
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              ris verſus
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              ignem. </s>
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              20</s>
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              25</s>
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              Atque ex his patet, ad ignis conſervationem duo re­
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              quiri: primum, ut in eo ſint particulae terreſtres, quae,
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              à primo elemento impulſae, vim habeant impediendi,
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              ne ab ae
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              re aliiſve liquoribus ſupra ipſum poſitis ſuf­
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              ſocetur. </s>
              <s>Loquor tantùm de liquoribus ſupra
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