Descartes, René, Renati Des-Cartes principia philosophiae

Table of figures

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              tur. </s>
              <s>Quod idem in omnibus terrae particulis, ad quas
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              Solis radii pertingunt, habet locum; & ideò omnes a
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              Solis lumine agitantur. </s>
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              XXVIII.
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              De tertiâ actione, quae
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              eſt lumen; quomodo
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              particulas ae
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              ris com­
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              moveat. </s>
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              <s>
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              5</s>
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              <s>
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              10</s>
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              <s>
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              15</s>
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            <p type="margin">
              <s>
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              20</s>
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              <s>
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              25</s>
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              <s>
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              30</s>
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            <figure id="fig59" number="61"/>
            <p type="main">
              <s>
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              Haec autem particularum terreſtrium agitatio, ſive
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              orta ſit à lumine, ſive ab aliâ quâvis cauſſâ,
                <arrow.to.target n="marg1374"/>
              vo­
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              catur; praeſertim cùm eſt major ſolito & movet ſen­
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              ſum; caloris enim denominatio ad ſenſum tactùs re­
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              fertur. </s>
              <s>Notandumque eſt unamquamque ex particulis
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              terreſtribus ſic agitatam, perſeverare poſtea in ſuo
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              motu juxta leges naturae a, donec ab aliquà alià
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              ſiſtatur; atque ideò calorem à lumine ortum, ſemper
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              aliquamdiu poſt ſublatum lumen remanere. </s>
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              XXIX.
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              De quartâ, quae eſt ca­
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              lor; quid ſit, & quo­
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              modo ſublato lumine
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              perſeveret. </s>
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            <p type="margin">
              <s>
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              5</s>
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              <s>
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              10</s>
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            <p type="main">
              <s>
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              Notandum praeterea particulas terreſtres, à radiis
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              Solis ſic impulſas, alias ſibi vicinas, ad quas iſti radii
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              non perveniunt, agitare; haſque rurſus alias, &
                <arrow.to.target n="marg1377"/>
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              conſequenter. </s>
              <s>Cùmque ſemper tota Terrae medietas à
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              Sole illuſtretur, tot ejuſmodi particulas ſimul commo­
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              veri, ut quamvis lumen in primâ opacâ` ſuperficie ſub­
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              ſiſtat, calor tamen ab eo genitus uſque ad intimas
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              partes mediea Terrae regionis debeat pervenire.
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              </s>
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              XXX.
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              Cur altiùs penetret,
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              quàm lumen. </s>
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            <p type="margin">
              <s>
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              15</s>
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            <p type="margin">
              <s>
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              20</s>
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              <s>
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              Notandum denique iſtas particulas terreſtres, cùm
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              à ealore plus ſolito agitantur, in tam anguſto ſpatio
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              vulgò non poſſe contineri, quàm cùm quieſcunt vel
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              minùs moventur quia figuras habent irregulares, quae
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              minùs loci occupant, cùm certo aliquo modo junctae
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              25
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              quieſcunt, quàm cùm aſſiduo motu disjunguntur. </s>
              <s>Unde
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              ſit, ut calor omnia fere corpora terreſtria rarefaciat,
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              ſed una magis, alia minùs, pro vario ſitu & figurâ par­
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              ticularum, ex quibus conſtant. </s>
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              XXXI.
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              Cur corpora ferè om­
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              nia rarefaciat. </s>
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              His variis adionibus animadverſis, ſi
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              confi­</s>
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