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-div143" type="section" level="1" n="143">
          <head xml:id="echoid-head152" xml:space="preserve">EXPERIMENTUM CXVII.</head>
          <p>
            <s xml:id="echoid-s5723" xml:space="preserve">Deinde duas laminas Chalybeas, vi Magnetica donatas, Tab. </s>
            <s xml:id="echoid-s5724" xml:space="preserve">4.
              <lb/>
            </s>
            <s xml:id="echoid-s5725" xml:space="preserve">fig. </s>
            <s xml:id="echoid-s5726" xml:space="preserve">4, AB ita impoſui plano lævigato, ſive ſpeculo vitreo, ut am-
              <lb/>
            bo poli cognomines ſe ſpectarent, Indica arena circumſperſa in re-
              <lb/>
            ctas ſeries ex polari ſuperficie exeuntes ordinabatur, hæ tamen in
              <lb/>
            medio intervallo incurvabantur, ſeſe mutuo fugantes ita, ut nulla
              <lb/>
            particula arenæ in ſphærâ virium laminæ A attraheretur aut adhæ-
              <lb/>
            reret particulis circa laminam B jacentibus. </s>
            <s xml:id="echoid-s5727" xml:space="preserve">Inverſa autem alteru-
              <lb/>
            tra lamina, ut duo poli alterius nominis ſibi opponerentur, pror-
              <lb/>
            ſus diverſa ratione arena Indica ordinabatur, uti in Tab. </s>
            <s xml:id="echoid-s5728" xml:space="preserve">4. </s>
            <s xml:id="echoid-s5729" xml:space="preserve">fig. </s>
            <s xml:id="echoid-s5730" xml:space="preserve">5. </s>
            <s xml:id="echoid-s5731" xml:space="preserve">
              <lb/>
            ſeſe attrahebant arenulæ ab utriuſque laminæ viribus certo modo
              <lb/>
            directæ, in medio utriuſque intervalli recta exporrigebantur ſeries,
              <lb/>
            quæ mox utrimque incurvabantur, magis minuſve prout propiores
              <lb/>
            medio, vel plus ab eo aberant, figura accuratius omnia ob oculos
              <lb/>
            ponit, quam verbis deſcribi poſſent.</s>
            <s xml:id="echoid-s5732" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5733" xml:space="preserve">Non diſcrepat hic ſerierum ordo ab eo, quem duo Magnetes ſibi
              <lb/>
            obverſi inſtruunt, polis enim cognominibus ſe ſpectantibus, lima-
              <lb/>
            tura Ferri dirigitur accurate uti in fig. </s>
            <s xml:id="echoid-s5734" xml:space="preserve">4.</s>
            <s xml:id="echoid-s5735" xml:space="preserve">: a laminis & </s>
            <s xml:id="echoid-s5736" xml:space="preserve">polis alterni
              <lb/>
            nominis ſe ſpectantibus, limatura ordinatur, quemadmodum in
              <lb/>
            fig. </s>
            <s xml:id="echoid-s5737" xml:space="preserve">5. </s>
            <s xml:id="echoid-s5738" xml:space="preserve">quod nequaquam eſt mirandum, quia Ferrum ſuper Magne-
              <lb/>
            te ductum, ejuſmodi viribus imprægnatur, quæ nullomodo a Ma-
              <lb/>
            gneticis diſcrepant.</s>
            <s xml:id="echoid-s5739" xml:space="preserve"/>
          </p>
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        <div xml:id="echoid-div144" type="section" level="1" n="144">
          <head xml:id="echoid-head153" xml:space="preserve">EXPERIMENTUM CXVIII.</head>
          <p>
            <s xml:id="echoid-s5740" xml:space="preserve">Tab. </s>
            <s xml:id="echoid-s5741" xml:space="preserve">4. </s>
            <s xml:id="echoid-s5742" xml:space="preserve">fig. </s>
            <s xml:id="echoid-s5743" xml:space="preserve">6. </s>
            <s xml:id="echoid-s5744" xml:space="preserve">Sint duæ laminæ Chalybeæ A B, C D, ſibi junctæ
              <lb/>
            ad B & </s>
            <s xml:id="echoid-s5745" xml:space="preserve">C, extremo D Magnes apponatur, atque circa laminas
              <lb/>
            ſpargatur limatura, ejus parva portio lateribus adhærebit; </s>
            <s xml:id="echoid-s5746" xml:space="preserve">alia re-
              <lb/>
            motior in ſeries ordinabitur, anterius ê regione A rectâ exporrec-
              <lb/>
            tas, ad latera vero curvas, quæ eo magis inclinabunt ad Magne-
              <lb/>
            tem, quo ipſi propiores fuerint. </s>
            <s xml:id="echoid-s5747" xml:space="preserve">Ejuſmodi Experimentum a ſein-
              <lb/>
            ſtitutum memorat quoque de La Hire in L’Hiſt. </s>
            <s xml:id="echoid-s5748" xml:space="preserve">de L’ Academ.
              <lb/>
            </s>
            <s xml:id="echoid-s5749" xml:space="preserve">Roy. </s>
            <s xml:id="echoid-s5750" xml:space="preserve">A°. </s>
            <s xml:id="echoid-s5751" xml:space="preserve">1717 Comparemus hunc ſerierum ordinem cum eo, quem
              <lb/>
            fig. </s>
            <s xml:id="echoid-s5752" xml:space="preserve">1. </s>
            <s xml:id="echoid-s5753" xml:space="preserve">Tab. </s>
            <s xml:id="echoid-s5754" xml:space="preserve">4. </s>
            <s xml:id="echoid-s5755" xml:space="preserve">repræſentat, & </s>
            <s xml:id="echoid-s5756" xml:space="preserve">magnam obſervabimus </s>
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