Descartes, René, Renati Des-Cartes principia philosophiae

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    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <s>
                <pb pagenum="311"/>
              hactenus circa magnetem verè ac pro certo fuiſſe ob­
                <lb/>
              ſervatum, cujus ratio, ex iis quae explicui, non facilè
                <lb/>
              intelligatur. </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1960"/>
              25</s>
            </p>
            <p type="main">
              <s>Hîc autem occaſione magnetis qui trahit ferrum,
                <lb/>
                <arrow.to.target n="marg1961"/>
              aliquid addendum eſt de ſuccino, gagate, cerâ, reſinâ,
                <lb/>
              vitro & ſimilibus, quae omnia minuta corpora etiam
                <lb/>
              trahunt. </s>
              <s>Quamvis enim mei non ſit inſtituti, particu­
                <lb/>
              laria ulla explicare, niſi quatenus requiruntur ad ge­
                <lb/>
              neraliora, de quibus egi, confirmanda; nec examinare
                <lb/>
                <arrow.to.target n="marg1962"/>
              poſſim iſtam vim in gagate vel ſuccino, niſi priùs ex
                <lb/>
              variis experimentis plures alias eorum proprietates
                <lb/>
              deducam, & ita intimam ipſorum naturam inveſtigem:
                <lb/>
              quia tamen eadem vis in vitro etiam eſt, de quo mihi
                <lb/>
              paullò antèa fuit agendum ad ignis effectus demon­
                <lb/>
                <arrow.to.target n="marg1963"/>
              ſtrandos, niſi eam explicarem, alia forſan quae de illo
                <lb/>
              ſcripſi, poſſent in dubium revocari. </s>
              <s>Praeſertim quia
                <lb/>
              fortè nonnulli, videntes iſtam vim in ſuccino, cerâ,
                <lb/>
              reſinâ, & oleagineis ferè omnibus reperiri, putabunt
                <lb/>
              ipſam in eo conſiſtere, quòd tenues quaedam & ramo­
                <lb/>
                <arrow.to.target n="marg1964"/>
              ſae iſtorum corporum particu1ae, frictione commotae
                <lb/>
              (frictio enim ad illam vim excitandam requiri ſolet),
                <lb/>
              per ae*rem vicinum ſe diffundant, ac ſibi mutuò adhae­
                <lb/>
              reſcentes protinus revertantur, & minuta corpora quae
                <lb/>
              in itinere offendunt, ſecum trahant. </s>
              <s>Quemadmodum
                <lb/>
                <arrow.to.target n="marg1965"/>
              videmus ejuſmodi pinguium liquefactorum guttas,
                <lb/>
              bacillo appenſas, levi motu ita excuti poſſe, ut unâ
                <lb/>
              earum parte bacillo adhaerente, alia pars ad aliquam
                <lb/>
              diſtantiam ab eo recedat, ſtatimque revertatur, nec
                <lb/>
              non feſtucas, aliave obvia corpuſcula ſecum adducat.
                <lb/>
                <arrow.to.target n="marg1966"/>
              Nihil enim tale in vitro licet imaginari, ſaltem ſi </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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