Descartes, René, Renati Des-Cartes principia philosophiae

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    <archimedes>
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        <body>
          <chap>
            <p type="main">
              <s>
                <pb pagenum="212"/>
              centro expellent; atque ita omnes ad guttam ſphaeri­
                <lb/>
              cam faciendam concurrent. </s>
              <s>Et cùm angulus contin­
                <lb/>
              gentiae, quo ſolo linea circularis à rectà diſtat, omni
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              angulo rectilineo ſit minor, & in nullâ lineâ curvâ prae­
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              terquam in circulari ſit ubique aequalis: certum eſt,
                <arrow.to.target n="marg1332"/>
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              lineam rectam nunquam poſſe magis aequaliter, & mi­
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              nus in unoquoque ex ſuis punctis inflecti, quàm cùm
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              degenerat in circularem. </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1328"/>
              XIX.
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              De Tertio effectu: quòd
                <lb/>
              liquorum guttas red­
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              dat rotundas. </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1329"/>
              20</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1330"/>
              25</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1331"/>
              30</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1332"/>
              5</s>
            </p>
            <p type="main">
              <s>
                <arrow.to.target n="marg1333"/>
                <lb/>
              Vis gravitatis à tertià iſtâ globulorum coeleſtium
                <lb/>
              actione non multum diſſert. </s>
              <s>Ut enim illi globuli
                <arrow.to.target n="marg1334"/>
                <lb/>
              ſolum ſuum motum, quo ſine diſcrimine quaquaverſus
                <lb/>
              feruntur, omnes cujuſque guttae particulas verſus ejus
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              centrum aequaliter premunt, ſicque ipſam guttam fa­
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              ciunt rotundam: ita per eundem motum, totius molis
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              terrae occurſu impediti, ne ſecundùm lineas
                <arrow.to.target n="marg1335"/>
              ſe­
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              rantur, omnes ejus partes verſus medium propellunt:
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              atque in hoc gravitas corporum terreſtrium conſiſtit. </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1333"/>
              XX.
                <lb/>
              Explicatio ſecundae
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              actionis, quae gravi­
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              tas vocatur. </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1334"/>
              10</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1335"/>
              15</s>
            </p>
            <p type="main">
              <s>
                <arrow.to.target n="marg1336"/>
                <lb/>
              Cujus natura ut perfectè intelligatur, notandum eſt
                <lb/>
              primò, ſi omnia ſpatia circa Terram, quae ab ipſius
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              Terrae materiâ non occupantur, vacua eſſent, hoc eſt,
                <arrow.to.target n="marg1337"/>
                <lb/>
              ſi nihil continerent niſi corpus, quod motus aliorum
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              corporum nullà ratione impediret nec juvaret (ſic
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              enim tantùm intelligi poteſt vacui nomen), & interim
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              haec terra circa ſuum axem, ſpatio viginti quatuor ho­
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              rarum, proprio motu volveretur, fore ut illae
                <arrow.to.target n="marg1338"/>
                <lb/>
              ejus partes, quae ſibi mutuò non eſſent valde firmiter
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              alligatae, hinc inde verſus coelum diſſilirent: eodem
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              modo, quo videre licet, dum turbo gyrat, ſi arena
                <lb/>
              ſupra ipſum conjiciatur, eam ſtatim ab illo recedere
                <lb/>
              atque in omnes partes diſpergi; & ita Terra
                <arrow.to.target n="marg1339"/>
              gra­
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              vis, ſed contrà potiùs levis eſſe dicenda. </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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