Descartes, René, Renati Des-Cartes principia philosophiae

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    <archimedes>
      <text>
        <body>
          <chap>
            <pb pagenum="281"/>
            <p type="margin">
              <s>
                <margin.target id="marg1782"/>
              CXL.
                <lb/>
              Quomodo fuſione fiat
                <lb/>
              chalybs, & quòdvis
                <lb/>
              ferrum. </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1783"/>
              5</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1784"/>
              10</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1785"/>
              15</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1786"/>
              20</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1787"/>
              25</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1788"/>
              30</s>
            </p>
            <p type="main">
              <s>
                <arrow.to.target n="marg1789"/>
                <lb/>
              Et totus liquor, hoc pacto in guttulas ſive grumulos
                <lb/>
              distinctus, ſi celeriter frigeſcat, concreſcit in chalybem
                <lb/>
              admodùm durum rigidtim & fragilem, fere ut vitrum. </s>
              <s>
                <lb/>
              Quippe durus eſt, quia conſtat ramentis ſibi mutuò
                <lb/>
                <arrow.to.target n="marg1790"/>
              arctiſſimè conjunctis; & rigidus hoc eſt, talis ut, ſi
                <lb/>
              flectatur, ſpontè redeat ad priorem figuram, quia
                <lb/>
              flexione iſtâ ejus ramentorum exiguae ſuperficies non
                <lb/>
              disjunguntur, ſed ſoli meatus figuras mutant, ut ſuprà
                <lb/>
              de vitro dictum eſt a; denique eſt fragilis, quia gut­
                <lb/>
                <arrow.to.target n="marg1791"/>
              tulae, ſive grumuli, quibus conſtat, ſibi mutuò non
                <lb/>
              adhaerent, niſi per ſuperficierum ſuarum contactum;
                <lb/>
              atque hîc contactus non niſi in Pauciſſimis &, perexi­
                <lb/>
              guis locis immediatus eſſe poteſt. </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1789"/>
              CXLI.
                <lb/>
              Cur chalybs ſit valde
                <lb/>
              durus, rigidus, & fra­
                <lb/>
              gilis. </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1790"/>
              5</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1791"/>
              10</s>
            </p>
            <p type="main">
              <s>
                <arrow.to.target n="marg1792"/>
                <lb/>
              Non autem omnes glebae aequè aptie ſunt, ut in
                <lb/>
                <arrow.to.target n="marg1793"/>
              chalybem vertantur; ac etiam illae eaedem, ex quibus
                <lb/>
              optimus & duriſſimus chalybs fieri ſolet, vile, tan­
                <lb/>
              tùm ferrum dant, cùm igne non convenienti fundun­
                <lb/>
              tur. </s>
              <s>Nam, ſi glebae ramenta ſint adeò anguloſa &
                <lb/>
              confragoſa, ut ſibi mutuò priùs adhaerent, quàm ſu­
                <lb/>
                <arrow.to.target n="marg1794"/>
              perficies ſuas aptè poſſint ad invicem applicare, atque
                <lb/>
              in guttulas diſtingui; vel ſi ignis non ſit ſatis fortèis ad
                <lb/>
              liquorem ita in guttulas diſtinguendum, & ramenta
                <lb/>
              ipſas componentia ſimul conſtringenda; vel contrà,
                <lb/>
              ſi ſit tam fortis, ut iſtorum ramentorum aptum ſitum
                <lb/>
                <arrow.to.target n="marg1795"/>
              diſturbet: non chalybs, ſed ferrum minùs durum &
                <lb/>
              magis flexile habetur. </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1792"/>
              CXLII.
                <lb/>
              Quae ſit differentia in­
                <lb/>
              terchalybem, & aliud
                <lb/>
              ferrum. </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1793"/>
              15</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1794"/>
              20</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1795"/>
              25</s>
            </p>
            <p type="main">
              <s>
                <arrow.to.target n="marg1796"/>
                <lb/>
              Ac etiam chalybs jam factus, ſi rurſus igni admo­
                <lb/>
              veatur, etſi non facilè liqueſcat, quia ejus grumuli
                <lb/>
              nimis craſſi ſunt & ſolidi ut ab igne integri movean­
                <lb/>
                <arrow.to.target n="marg1797"/>
              tur, & ramenta quibus unuſquiſque grumulus </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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