Descartes, René, Renati Des-Cartes principia philosophiae

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    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <s>
                <pb pagenum="297"/>
              ae
                <gap/>
              rem reflexae. </s>
              <s>Eadem pars R, ſi jacet ſupra aequato­
                <lb/>
              rem magnetis, & reſpiciat ejus polum Borealem, ut
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              in C, fiet rurſus polus Auſtralis ferri; ſed ſi invertatur
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              &sreſpiciat polum Auſtralem, ut in D, tunc amittet
                <lb/>
                <arrow.to.target n="marg1889"/>
              vim poli Auſtralis, & fiet polus Borealis. </s>
              <s>Denique, ſi
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              S pars media iſtius ferri tangat polum magnetis A,
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              particulae ſtriate Boreales, illud ingreſſae per S, utrim­
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              que egredientur per R & T; ſicque in utrâque extremi­
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              tate recipiet vim poli Auſtralis, & in medio vim poli
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                <arrow.to.target n="marg1890"/>
              Borealis. </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1887"/>
              CLIX.
                <lb/>
              Cur ferrum pro variis
                <lb/>
              modis, quibus ma­
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              gneti admoyetur, ip­
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              ſam diverſimodè reci­
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              piat b. </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1888"/>
              25</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1889"/>
              5</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1890"/>
              10</s>
            </p>
            <figure id="fig86" number="90"/>
            <p type="main">
              <s>
                <arrow.to.target n="marg1891"/>
                <lb/>
              Quaeri tantùm poteſt, cur iſtae particulae ſtriatae, ex
                <lb/>
              magnetis polo A ferri partem S ingredientes, non
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              rectà pergant verſus E, ſed potiùs hinc inde reflectan­
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              tur verſus R & T; ſicque hoc ferrum ſecundùm ſuam
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                <arrow.to.target n="marg1892"/>
              longitudinem, potiùs quàm ſecundùm latitudinem,
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              vim magneticam recipiat. </s>
              <s>Sed facilis reſponſio eſt,
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              quia multò magis apertas & facilèes vias inveniunt
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              in ferro, quàm in ae
                <gap/>
              re, à quo idcirco verſus ferrum
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              reflectuntur. </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1891"/>
              CLX.
                <lb/>
              Cur ferrum oblongum
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              eam non recipiat, niſi
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              ſecundùm ſuam lon­
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              gitudinem a. </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1892"/>
              15</s>
            </p>
            <p type="main">
              <s>
                <arrow.to.target n="marg1893"/>
                <lb/>
                <arrow.to.target n="marg1894"/>
              Facilis etiam reſponſio eſt, ſi quaeratur cur magnes
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              nihil amittat de ſuâ vi, cùm eam ferro communicat. </s>
              <s>
                <lb/>
              Nulla enim in magnete mutatio fit, propterea quòd
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              particulae ſtriatae, ex eo egredientes, ferrum potiùs
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              quàm quòdvis aliud corpus ingrediuntur: niſi forſan
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                <arrow.to.target n="marg1895"/>
              quòd, liberiùs per ſerrum quàm per alia corpora
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              tranſeundo, copioſiùs etiam ex magnete, cùm ferrum
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              ei adjunctum eſt, egrediantur; quo tantum abeſt, ut
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              ejus vis minuatur, quin potiùs augetur. </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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