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-div15" type="section" level="1" n="15">
          <p>
            <s xml:id="echoid-s609" xml:space="preserve">
              <pb o="24" file="0038" n="38" rhead="DISSERTATIO"/>
            perimentis I, II, V. </s>
            <s xml:id="echoid-s610" xml:space="preserve">in diſtantiis æqualium linearum eſſe admodum
              <lb/>
            diverſas, in Experimento quinto eſſe majores quam in tertio, & </s>
            <s xml:id="echoid-s611" xml:space="preserve">in
              <lb/>
            tertio majores quam in primo, mirandum tamen eſt in immediato
              <lb/>
            contactu Magnetum vires eſſe easdem, nam ſunt æquales 340 gra-
              <lb/>
            nis: </s>
            <s xml:id="echoid-s612" xml:space="preserve">idque eo plus eſt mirandum, cum Magnetes ſuspenſi ex Libra,
              <lb/>
            qui tribus memoratis Experimentis inſervierunt, ſunt inæquales quo-
              <lb/>
            ad volumina, & </s>
            <s xml:id="echoid-s613" xml:space="preserve">gravitates, formasque habent diverſas: </s>
            <s xml:id="echoid-s614" xml:space="preserve">cumque vires
              <lb/>
            horum Magnetum etiam ſint valde diverſæ inter ſe, nam præſtan-
              <lb/>
            tiſſimus eſt Magnes rotundus primi Experimenti, licet ſit parvus;
              <lb/>
            </s>
            <s xml:id="echoid-s615" xml:space="preserve">Sunt vires Magnetis Experimenti quinti mediocriter bonæ; </s>
            <s xml:id="echoid-s616" xml:space="preserve">ſed vires
              <lb/>
            illius adhibiti in tertio Experimento ſunt valde debiles. </s>
            <s xml:id="echoid-s617" xml:space="preserve">Accedit in-
              <lb/>
            ſuper, quod in primo Experimento duo globi ſe contingebant, in
              <lb/>
            tertio & </s>
            <s xml:id="echoid-s618" xml:space="preserve">quinto globus contingebat planam ſuperficiem: </s>
            <s xml:id="echoid-s619" xml:space="preserve">contactus
              <lb/>
            in his tribus caſubus eſt quidem in uno puncto, verum ultra conta-
              <lb/>
            ctus punctum ſuperſicies ſphæricæ illico magis a ſe recedendo diſtant,
              <lb/>
            quam ſuperficies ſphærica & </s>
            <s xml:id="echoid-s620" xml:space="preserve">plana: </s>
            <s xml:id="echoid-s621" xml:space="preserve">Cum mecum hæc omnia atten-
              <lb/>
            tius volvebam, incepi dubitare, an quidem Magnetum actio penderet
              <lb/>
            ab effluviis quibusdam Magneticis, vel Fluido quodam externo,
              <lb/>
            quocunque ſub nomine veniat; </s>
            <s xml:id="echoid-s622" xml:space="preserve">cui examini poſtea plus operæ impen-
              <lb/>
            di: </s>
            <s xml:id="echoid-s623" xml:space="preserve">Si enim pendeat Actio Magnetum duorum in ſe ab effluviis mu-
              <lb/>
            tuis, tum eo erit Actio major, quo effluvia ſunt copioſiora, & </s>
            <s xml:id="echoid-s624" xml:space="preserve">hæc
              <lb/>
            copia majori effluent ex Magnetibus generoſioribus, quam ex lan-
              <lb/>
            guidis; </s>
            <s xml:id="echoid-s625" xml:space="preserve">quamobrem multo plura exiviſſent eſfluvia ex iis, quibus
              <lb/>
            uſus fui in Experimento primo & </s>
            <s xml:id="echoid-s626" xml:space="preserve">quinto, quia hi præſtabant altero
              <lb/>
            in Experimento tertio adhibito: </s>
            <s xml:id="echoid-s627" xml:space="preserve">in immediato contactu tamen omni-
              <lb/>
            um vires æquales ſunt notatæ.</s>
            <s xml:id="echoid-s628" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div16" type="section" level="1" n="16">
          <head xml:id="echoid-head23" xml:space="preserve">EXPERIMENTUM VI.</head>
          <p>
            <s xml:id="echoid-s629" xml:space="preserve">Huc usque examinaveram attractiones duorum polorum in ambo-
              <lb/>
            bus Magnetibus, verum indagandum duxi an corundem Magnetum
              <lb/>
            poli alteri ſibi obverſi easdem, an varias vires attrahentes exercerent,
              <lb/>
            quam bini priores examinati.</s>
            <s xml:id="echoid-s630" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s631" xml:space="preserve">Igitur Magnetem parvum ſphæricum H, qui primo Experimen-
              <lb/>
            to inſervierat, iterum ſuspendi ex fune Bilanci annexo, ſed ut po-
              <lb/>
            lus alter deorſum nunc eſſet converſus; </s>
            <s xml:id="echoid-s632" xml:space="preserve">tum Magnetem </s>
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