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-div54" type="section" level="1" n="54">
          <p>
            <s xml:id="echoid-s2501" xml:space="preserve">
              <pb o="103" file="0117" n="117" rhead="DE MAGNETE."/>
            plurimas vires de ſe ſpargeret; </s>
            <s xml:id="echoid-s2502" xml:space="preserve">hæ tamen a Ferro non recipiuntur
              <lb/>
            ſemper in tanta copia, quam quidem illæ, quæ ex Magnete debili
              <lb/>
            effluunt, & </s>
            <s xml:id="echoid-s2503" xml:space="preserve">copia minores ſunt: </s>
            <s xml:id="echoid-s2504" xml:space="preserve">quare nonnullorum vires magis
              <lb/>
            conveniunt cum fabrica partium Ferri, quam aliorum.</s>
            <s xml:id="echoid-s2505" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2506" xml:space="preserve">Datur ita etiam Ferrum, quod a Magnete parum virtutis accipit,
              <lb/>
            dum interim aliud Ferrum ab eodem Magnete majori vi donatur.</s>
            <s xml:id="echoid-s2507" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div55" type="section" level="1" n="55">
          <head xml:id="echoid-head63" xml:space="preserve">EXPERIMENTUM. XXXV.</head>
          <p>
            <s xml:id="echoid-s2508" xml:space="preserve">Si Ferrum ſubitiſſime ſupra Magnetem ſemel ducatur, aliquantum
              <lb/>
            virtutis acquirit, ſi repetatur affrictio ſupra eundem Magnetis lo-
              <lb/>
            cum & </s>
            <s xml:id="echoid-s2509" xml:space="preserve">cum eadem directione, ferrum a Magnete elevando, quando
              <lb/>
            ad extremum perductum eſt, augetur vis in Ferro, donec poſt ali-
              <lb/>
            quot repetitos affrictus acceperit omnem vim, quam poteſt: </s>
            <s xml:id="echoid-s2510" xml:space="preserve">poſtea
              <lb/>
            enim ſæpius reiterati affrictus ſupra eundem Magnetem, nihil plus
              <lb/>
            virium Ferro concedunt.</s>
            <s xml:id="echoid-s2511" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2512" xml:space="preserve">Hoc confirmavit Sturmius in Pbyſic. </s>
            <s xml:id="echoid-s2513" xml:space="preserve">Elect. </s>
            <s xml:id="echoid-s2514" xml:space="preserve">Tom. </s>
            <s xml:id="echoid-s2515" xml:space="preserve">2.</s>
            <s xml:id="echoid-s2516" xml:space="preserve">pag. </s>
            <s xml:id="echoid-s2517" xml:space="preserve">1090.
              <lb/>
            </s>
            <s xml:id="echoid-s2518" xml:space="preserve">In hoc Experimento Ferrum a Magnete tantum determinatas acqui-
              <lb/>
            rit vires non auctas, etiamſi millies Lapidi affricetur, quod non
              <lb/>
            evenit, quia pluribus viribus accipiendis foret impar, ſed quoniam
              <lb/>
            Magnes ille huic moli majores aut plures tribuere nequit; </s>
            <s xml:id="echoid-s2519" xml:space="preserve">ſi enim
              <lb/>
            hoc Ferrum ſuper liberaliori Magnete ducatur, majorem vim attra-
              <lb/>
            hendi acquirit.</s>
            <s xml:id="echoid-s2520" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2521" xml:space="preserve">Si Ferrum non ductum fuerit ſuper Magnete, ſed tantummodo
              <lb/>
            applicatum, tum non niſi elapſis aliquot horis imprægnatur vi Ma-
              <lb/>
            gnetica, quemadmodum recte adnotavit Cl. </s>
            <s xml:id="echoid-s2522" xml:space="preserve">Wolfius, non tamen
              <lb/>
            tot vires hoc modo recipit, ac ſi duceretur ſuper Magnete: </s>
            <s xml:id="echoid-s2523" xml:space="preserve">Quo-
              <lb/>
            niam igitur mera Ferri applicatio ad Magnetem, aut velox ſuper eo
              <lb/>
            ductus non largitur multum virtutis Ferro, præſtat hoc lente & </s>
            <s xml:id="echoid-s2524" xml:space="preserve">
              <lb/>
            cum valida appreſſione Magnetis polo attriviſſe.</s>
            <s xml:id="echoid-s2525" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div56" type="section" level="1" n="56">
          <head xml:id="echoid-head64" xml:space="preserve">EXPERIMENTUM. XXXVI.</head>
          <p>
            <s xml:id="echoid-s2526" xml:space="preserve">Si Ferrum affrictum forti liberalique Magneti vim magnam acce-
              <lb/>
            perit elevandi aliud Ferrum; </s>
            <s xml:id="echoid-s2527" xml:space="preserve">tum rurſus ducatur ſuper polo Magne-
              <lb/>
            tis debiliorum virium, plurimum de vi accepta priori amittet, </s>
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