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-s5756" xml:space="preserve">
              <pb o="243" file="0257" n="257" rhead="DE MAGNETE."/>
            quæ tota pendet ab appoſito laminæ Magnete, vel ſublato; </s>
            <s xml:id="echoid-s5757" xml:space="preserve">tranſit
              <lb/>
            in fig. </s>
            <s xml:id="echoid-s5758" xml:space="preserve">6. </s>
            <s xml:id="echoid-s5759" xml:space="preserve">ejus vis recta per laminæ longitudinem, ex cujus lateri-
              <lb/>
            bus quoque fere recta exporrigitur, ita ut evaneſcat curvilineus or-
              <lb/>
            do, medium laminæ cæteroquin ambiturus.</s>
            <s xml:id="echoid-s5760" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div145" type="section" level="1" n="145">
          <head xml:id="echoid-head154" xml:space="preserve">EXPERIMENTUM CXIX.</head>
          <p>
            <s xml:id="echoid-s5761" xml:space="preserve">Tab. </s>
            <s xml:id="echoid-s5762" xml:space="preserve">6. </s>
            <s xml:id="echoid-s5763" xml:space="preserve">fig. </s>
            <s xml:id="echoid-s5764" xml:space="preserve">8. </s>
            <s xml:id="echoid-s5765" xml:space="preserve">Annulus integer Chalybeus A B diametri 2 polli-
              <lb/>
            cum, Experimento inſerviit, pars A ducta fuit ſuper polo Magne-
              <lb/>
            tis Boreo, pars B ſuper polo Auſtrali; </s>
            <s xml:id="echoid-s5766" xml:space="preserve">tum circa ipſum, ſpeculo vi-
              <lb/>
            treo impoſitum, circumſperſa fuit Ferri limatura vel Arena Indica;
              <lb/>
            </s>
            <s xml:id="echoid-s5767" xml:space="preserve">ea, quæ loca affricta ſpectabat, in ſeries rectas dirigebatur, at in
              <lb/>
            aliquâ ab his locis diſtantiâ duæ ſeries curvilineæ, ſibi oppoſitæ for-
              <lb/>
            mabantur, quales ſunt C D. </s>
            <s xml:id="echoid-s5768" xml:space="preserve">Arena ſpatio annuli medio injecta le-
              <lb/>
            viter in ſeries curvas è regione C & </s>
            <s xml:id="echoid-s5769" xml:space="preserve">D ordinabatur, cæteroquin pro
              <lb/>
            maximâ parte eâdem directione diſponebatur, qua ſeries loca atta-
              <lb/>
            cta ſpectantes. </s>
            <s xml:id="echoid-s5770" xml:space="preserve">Celeb. </s>
            <s xml:id="echoid-s5771" xml:space="preserve">de la Hire primus inſtituit hoc Experimen-
              <lb/>
            tum, in Philoſ. </s>
            <s xml:id="echoid-s5772" xml:space="preserve">Tranſ. </s>
            <s xml:id="echoid-s5773" xml:space="preserve">N°. </s>
            <s xml:id="echoid-s5774" xml:space="preserve">188. </s>
            <s xml:id="echoid-s5775" xml:space="preserve">deſcriptum, addens ſe lamellam
              <lb/>
            Ferri, in cuſpidem terminatam inſtar cultri, Magneti affricuiſſe,
              <lb/>
            tum cuſpidem annulo obverſam, varias partes attraxiſſe, non modo
              <lb/>
            unam alteramve A vel B, quemadmodum in Verſorio vulgari con-
              <lb/>
            tigiſſet: </s>
            <s xml:id="echoid-s5776" xml:space="preserve">obſervavit inſuper annulum Chalybeum Magneti affrictum,
              <lb/>
            diu ſuam virtutem retinuiſſe, quamvis poli in ſitu contrario, ac
              <lb/>
            poli Mundi, poſiti fuerint. </s>
            <s xml:id="echoid-s5777" xml:space="preserve">Tum annulum Chalybeum fortiſſimo
              <lb/>
            Magneti affrictum, non niſi ægre contrariam directionem recipere,
              <lb/>
            ſi ſuper Magnete debiliore oppoſita determinatione ducatur, quam-
              <lb/>
            vis tamen in initio directionem amiſiſſe videatur, ſucceſſu temporis
              <lb/>
            priorem ipſum vim & </s>
            <s xml:id="echoid-s5778" xml:space="preserve">directionemrecipere, haudſecus, quam in duo-
              <lb/>
            bus Magnetibus inæqualium virium contingit, qui polis cognomi-
              <lb/>
            nibus ſibi appoſitis, vim directricem ex debiliori fugant, contra-
              <lb/>
            riamque inducunt, a ſe autem iterum remoti gradatim priſtinam
              <lb/>
            recuperant virtutem & </s>
            <s xml:id="echoid-s5779" xml:space="preserve">directionem.</s>
            <s xml:id="echoid-s5780" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div146" type="section" level="1" n="146">
          <head xml:id="echoid-head155" xml:space="preserve">EXPERIMENTUM CXX.</head>
          <p>
            <s xml:id="echoid-s5781" xml:space="preserve">Tab. </s>
            <s xml:id="echoid-s5782" xml:space="preserve">6. </s>
            <s xml:id="echoid-s5783" xml:space="preserve">fig. </s>
            <s xml:id="echoid-s5784" xml:space="preserve">6. </s>
            <s xml:id="echoid-s5785" xml:space="preserve">Duorum ſemicirculorum ferreorum AB, ab, </s>
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