Musschenbroek, Petrus van, Physicae experimentales, et geometricae de magnete, tuborum capillarium vitreorumque speculorum attractione, magnitudine terrae, cohaerentia corporum firmorum dissertationes: ut et ephemerides meteorologicae ultraiectinae

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        <div xml:id="echoid-div73" type="section" level="1" n="73">
          <pb o="113" file="0127" n="127" rhead="DE MAGNETE."/>
        </div>
        <div xml:id="echoid-div74" type="section" level="1" n="74">
          <head xml:id="echoid-head82" xml:space="preserve">EXPERIMENTUM. LIV.</head>
          <p>
            <s xml:id="echoid-s2761" xml:space="preserve">Tab. </s>
            <s xml:id="echoid-s2762" xml:space="preserve">6. </s>
            <s xml:id="echoid-s2763" xml:space="preserve">fig. </s>
            <s xml:id="echoid-s2764" xml:space="preserve">2. </s>
            <s xml:id="echoid-s2765" xml:space="preserve">Tabulæ D inſiſtat Acus C D perpendicularis, at-
              <lb/>
            tracta a Magnete ſuperius poſita A B, tum admoveatur Acus F G
              <lb/>
            tranſverſe, quæ ulterius promota tranſiret inter Acum C D & </s>
            <s xml:id="echoid-s2766" xml:space="preserve">Ma-
              <lb/>
            gnetem A B, illico cadet Acus C D, non amplius attracta.</s>
            <s xml:id="echoid-s2767" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2768" xml:space="preserve">Quantum igitur a viâ ſuâ detorqueri poteſt vis Magnetica, imo
              <lb/>
            quam facilea parva cauſa? </s>
            <s xml:id="echoid-s2769" xml:space="preserve">nam acus F G omnem vim, antea determi-
              <lb/>
            natam ſecundum C D, abripit, inflectitque ſecundum F G: </s>
            <s xml:id="echoid-s2770" xml:space="preserve">Qui-
              <lb/>
            cunque Aquarum motus Fluidorumque decurſus cognoſcit, facile
              <lb/>
            perſpiciet hoc phænomenon reſpuere omnes Fluidorum currentium
              <lb/>
            Leges, & </s>
            <s xml:id="echoid-s2771" xml:space="preserve">idcirco Magnetem non operari effluviis, aut Fluido quo-
              <lb/>
            cunque alio.</s>
            <s xml:id="echoid-s2772" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div75" type="section" level="1" n="75">
          <head xml:id="echoid-head83" xml:space="preserve">EXPERIMENTUM LV.</head>
          <p>
            <s xml:id="echoid-s2773" xml:space="preserve">Lamina ferrea, ſuper præſtantiſſimo ducta Magnete, viribus inſi-
              <lb/>
            gnibus imprægnata fuit, hæc impoſita incudi, malleo aliquamdiu
              <lb/>
            tuſa fuit, quo omnes amiſit a Magnete antea acceptas vires, non
              <lb/>
            enim niſi leviſſimas ſcobis| particulas geſtabat, vi â pulſatione com-
              <lb/>
            municata, qualem omne Ferrum malleis contuſum, acquirit; </s>
            <s xml:id="echoid-s2774" xml:space="preserve">ſed
              <lb/>
            nequaquam vel leviſſimam attollere potuit Acum.</s>
            <s xml:id="echoid-s2775" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2776" xml:space="preserve">Grimaldi in Phyſica eundem Experimenti ſucceſſum adnotavit:
              <lb/>
            </s>
            <s xml:id="echoid-s2777" xml:space="preserve">Quid hic vires ex Ferro expellit? </s>
            <s xml:id="echoid-s2778" xml:space="preserve">Partes Ferri, quod cuditur, a
              <lb/>
            ſe removentur, pori mutantur, aliarum partium fit contactus mu-
              <lb/>
            tuus, nil aliud in Ferro mutatur, id tamen aptum eſt turbandis,
              <lb/>
            & </s>
            <s xml:id="echoid-s2779" xml:space="preserve">profligandis viribus Magneticis, ut nullæ ſuperſint: </s>
            <s xml:id="echoid-s2780" xml:space="preserve">an igitur
              <lb/>
            pororum figura erit cauſa attractionis aut virtutis Magneticæ? </s>
            <s xml:id="echoid-s2781" xml:space="preserve">ne-
              <lb/>
            quaquam, quid enim porus eſt præter ſpatium vacuum, quod ſua
              <lb/>
            natura eſt iners, ſed an, cum ſitus partium mutatus eſt, etiam non
              <lb/>
            expulſa eſt vis, in quam cum Malleus egit, an non erit ſub-
              <lb/>
            ſtantia corporea? </s>
            <s xml:id="echoid-s2782" xml:space="preserve">corpus enim in aliud agere clare intelligi-
              <lb/>
            tur, ſed in diverſas ſubſtantias quomodo agat, non compre-
              <lb/>
            hendi poteſt; </s>
            <s xml:id="echoid-s2783" xml:space="preserve">agit tamen corpus in mentem humanam, rem
              <lb/>
            diſtinctiſſimam, an ſic mallei pulſatio non poſſet in vim Ma-
              <lb/>
            gneticam agere, etiamſi hæc non foret ſubſtantia corporea, </s>
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