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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          <p>
            <s xml:id="echoid-s2480" xml:space="preserve">
              <pb o="102" file="0116" n="116" rhead="DISSERTATIO"/>
            elevaturum: </s>
            <s xml:id="echoid-s2481" xml:space="preserve">Dechales contrarium quidem ſtatuit, niſi forte de vi-
              <lb/>
            ribus Magnetis, cum Chalybe in majore quantitate communica-
              <lb/>
            tis hæc opinatus fuerit, uti in præcedenti Experimento monitum
              <lb/>
            fuit.</s>
            <s xml:id="echoid-s2482" xml:space="preserve"/>
          </p>
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        <div xml:id="echoid-div54" type="section" level="1" n="54">
          <head xml:id="echoid-head62" xml:space="preserve">EXPERIMENTUM XXXIV.</head>
          <p>
            <s xml:id="echoid-s2483" xml:space="preserve">Nonnulli Magnetes multo plus virium communicant cum Ferro,
              <lb/>
            quam alii: </s>
            <s xml:id="echoid-s2484" xml:space="preserve">neque illi, qui fortiſſime trahunt magnam Ferri molem,
              <lb/>
            aut qui maximi ſunt, ſemper tantum virtutis dant Ferro, quam par-
              <lb/>
            vi debileſque.</s>
            <s xml:id="echoid-s2485" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2486" xml:space="preserve">Hoc diu obſervaverunt omnes fabri Acuum nauticarum, idcirco
              <lb/>
            ſemper quærentes Liberales, ut vocant, Magnetes, licet non ma-
              <lb/>
            gnam molem Ferri attrahant: </s>
            <s xml:id="echoid-s2487" xml:space="preserve">Experimentum cepi cum Magnete
              <lb/>
            præſtantiſſimo, ſuam virtutem manifeſto ad 14 pedum Rhenolandico-
              <lb/>
            rum diſtantiam exſerente, qui ſi bene armatus fuiſſet, forte 50 Li-
              <lb/>
            bras & </s>
            <s xml:id="echoid-s2488" xml:space="preserve">ultra, ferri, geſtaſſet. </s>
            <s xml:id="echoid-s2489" xml:space="preserve">Hujus polo Boreali lamellæ ferreæ
              <lb/>
            affrictæ ſunt, quarum vis, appendendo extremitatibus ponduſcula,
              <lb/>
            explorata fuit: </s>
            <s xml:id="echoid-s2490" xml:space="preserve">his deinde ignitis, ut vi accepta orbarentur, a Ma-
              <lb/>
            gnete parvo debilique, qui tantum Libras 4 elevabat, communica-
              <lb/>
            ta fuit vis attrahens multo major: </s>
            <s xml:id="echoid-s2491" xml:space="preserve">inſtituens hoc Experimentum cu-
              <lb/>
            ravi, ut ſuper polis cognominibus utriuſque Magnetis Ferrum du-
              <lb/>
            ceretur, cum æquali celeritate, eadem appreſſione, & </s>
            <s xml:id="echoid-s2492" xml:space="preserve">æqualibus
              <lb/>
            repetitionibus, cæteroquin nihil accurati concludi potuiſſet: </s>
            <s xml:id="echoid-s2493" xml:space="preserve">Cl.
              <lb/>
            </s>
            <s xml:id="echoid-s2494" xml:space="preserve">Whiſtonus idem confirmat tam ex ſua experientia, quam ex ea
              <lb/>
            præſtantis Fatii, & </s>
            <s xml:id="echoid-s2495" xml:space="preserve">Colonelli Windhami: </s>
            <s xml:id="echoid-s2496" xml:space="preserve">Sed attendit ad celerita-
              <lb/>
            tem vibrationum, quibus eadem Acus oſcillabat affricta diverſis Ma-
              <lb/>
            gnetibus; </s>
            <s xml:id="echoid-s2497" xml:space="preserve">atque ita ſimul adnotavit vim directricem non melius im-
              <lb/>
            pertiri Acui a Magnete magno quam ab exiguo: </s>
            <s xml:id="echoid-s2498" xml:space="preserve">Notandum autem
              <lb/>
            plerumque Magnetes fortiores plus virium cum Ferro communicare
              <lb/>
            quam debiliores:</s>
            <s xml:id="echoid-s2499" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2500" xml:space="preserve">Ex hoc Experimento videtur ſequi, vires in omnibus Magneti-
              <lb/>
            bus non eſſe eodem modo comparatas, has melius a Ferro recipi
              <lb/>
            poſſe aliis: </s>
            <s xml:id="echoid-s2501" xml:space="preserve">Nam probabiliſſimum eſt Magnetem fortiſſimum plures
              <lb/>
            vires ex ſe emittere, quam debilem, quomodo enim poſſet alio-
              <lb/>
            quin fortiſſimus eſſe, ſive maximam Ferri quantitatem geſtare, </s>
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