Descartes, René, Renati Des-Cartes principia philosophiae

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    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <s>
                <pb pagenum="294"/>
              accedunt, vel, ſi unus retineatur cùm ſaltem alter ad
                <lb/>
              ipſum venit. </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1857"/>
              CLIII.
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              Cur duo magnetes ad
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              invicem accedant, &
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              quae ſit cujuſque ſphae­
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              ra activitatisa.* </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1858"/>
              10</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1859"/>
              15</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1860"/>
              20</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1861"/>
              5</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1862"/>
              10</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1863"/>
              15</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1864"/>
              20</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1865"/>
              25</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1866"/>
              30</s>
            </p>
            <figure id="fig82" number="86"/>
            <p type="main">
              <s>
                <arrow.to.target n="marg1867"/>
                <lb/>
              Poli autem cognomines duorum magnetum, non ſic
                <lb/>
              ad invicem accedunt, ſed contrà potiùs, ſi nimis prope
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              admoveantur, recedunt. </s>
              <s>Particulae enim ſtriatae ab
                <arrow.to.target n="marg1868"/>
                <lb/>
              unius magnetis polo, qui alteri magneti obverſus eſt,
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              venientes, cùm hunc alterum ingredi non poſſint, ſpa­
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              tium aliquòd exigunt inter iſtos duos magnetes quò
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              tranſeant, ut ad alium magnetis ex quo egreſſae ſunt
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              polum revertantur. </s>
              <s>Nempe egredientes ab O
                <arrow.to.target n="marg1869"/>
              po­
                <lb/>
                <arrow.to.target n="fig83"/>
              lum A, cùm ingredi non poſſint in P
                <lb/>
              per ejus polum
                <emph type="italics"/>
              a
                <emph.end type="italics"/>
              , ſpatium aliquòd
                <lb/>
              exigunt inter A &
                <emph type="italics"/>
              a
                <emph.end type="italics"/>
              , per quòd tran­
                <lb/>
              ſeant verſus V & B, atque vi, quâ
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              motae ſunt à B ad A, pellunt magnetem P;
                <arrow.to.target n="marg1870"/>
              egre­
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              dientes à P pellunt magnetem O: ſaltem cùm eorum
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              axes BA &
                <emph type="italics"/>
              ab
                <emph.end type="italics"/>
              ſunt in eâdem lineâ recta. </s>
              <s>Sed cùm tan­
                <lb/>
              tillo magis in unam partem quàm in aliam inflexi ſunt,
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              tunc iſti magnetes ſe convertunt, modo paullò antè
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              explicato; vel ſi haec eorum converſio impediatur,
                <arrow.to.target n="marg1871"/>
                <lb/>
              autem motus rectus, tunc rurſus unus magnes alium
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              fugat ſecundum lineam rectam. </s>
              <s>Ita ſi magnes O,
                <lb/>
              exiguae cymbae impoſitus, aquae ſic innatet, ut ſem­
                <lb/>
              per ejus axis maneat ad perpendiculum eretus, &
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              magnes P, cujus polus Auſtralis Auſtrali
                <arrow.to.target n="marg1872"/>
              ob­
                <lb/>
              verſus eſt, manu moveatur verſus Y, hinc fiet. </s>
              <s>ut
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              magnes O recedat verſus Z, antequam à magnete P
                <lb/>
              tangatur. </s>
              <s>In quamcunque enim partem cymba ſe con­
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              vertat, requiritur ſemper aliquòd ſpatium inter iſtos
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              duos magnetes, ut particulae ſtriatae, ex iis
                <arrow.to.target n="marg1873"/>
              </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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