Descartes, René, Renati Des-Cartes principia philosophiae

Table of figures

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              CXXIII.
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              De Calce. </s>
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              20</s>
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              25</s>
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              30</s>
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              Ultimus ignis effectus, eſt calicis & cinerum in vi­
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              trum converſio. </s>
              <s>Poſtquam enim ex corporibus, quae
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              uruntur, tenuiores omnes particulae evulſae ac rejectae
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              ſunt, caeterae, quae pro calce vel cineribus manent,
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              tam ſolidae ſunt & craſſae, ut ignis vi ſurſum
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              non poſſint; figuraſque habent 'ut, plurimùm irregu­
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              lares & anguloſas: unde fit ut unae aliis incumbentes
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              ſibi mutuònon adhaereant, nec etiam, niſi fortè in mi­
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              nutiſſimis quibuſdam punctis, ſe contingant. </s>
              <s>Cùm au­
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              tem poſtea validus & diuturnus ignis pergit in
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              vim ſuam exercere, hoc eſt, cùm tenuiores particulae
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              tertii elementi, unà cum globulis ſecundi à materiâ
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              primi abreptae, celerrimè circa ipſas in omnes partes
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              moveri pergunt, paullatim earum anguli atteruntur,
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              &sſuperficies laevigantur, & fortè etiam nonnullae
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              ipſis inflectuntur, ſicque unae ſuper alias repentes &
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              fluentes, non punctis duntaxat, ſed exiguis quibuſdam
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              ſuperficiebus ſe contingunt, & hoc pacto ſimul con­
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              nexae vitrum componunt. </s>
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              CXXIV.
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              De vitro, quomodo fiat. </s>
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              5</s>
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              10</s>
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              <s>
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              15</s>
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              Quippe notandum eſt, cùm duo corpora,
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              ſuperficies aliquam latitudinem habent, ſibi mutuò
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              ſecundùm lineam rectam occurrunt, ipſa non poſſe
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              tam propè ad invicem accedere, quin ſpatium aliquòd
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              intercedat, quòd à globulis ſecundi elementi occupe­
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              tur; cùm autem unum ſupra aliud obliquè ducitur
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              vel repit, ea multo arctius jungi poſſe. </s>
              <s>Nam, exempli
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              cauſâ, ſi corpora B & C ſibi invicem occurrant ſecun­
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              dùm lineam AD, globuli coeleſtes eorum </s>
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