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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              <pb o="135" file="0149" n="149" rhead="DE MAGNETE."/>
            ſuperficiei occupat, eo plus virium a Magnete recipit, atque eo majus
              <lb/>
            pondus Ferri elevabit. </s>
            <s xml:id="echoid-s3310" xml:space="preserve">Videmus hinc quantum hæc vis Magnetis
              <lb/>
            differat a gravitate, quæ eſt in ratione ſoliditatis corporum, ſive in
              <lb/>
            eorum Diametrorum ratione triplicata: </s>
            <s xml:id="echoid-s3311" xml:space="preserve">& </s>
            <s xml:id="echoid-s3312" xml:space="preserve">ideo evidenter liquet, vim
              <lb/>
            Magnetis non poſſe pendere a lege Naturæ, quâ poſitis corporibus
              <lb/>
            duobus, ad ſe acceſſus fiet, quippe tum vis foret in ratione quan-
              <lb/>
            titatis corporeæ, hoc eſt utigravitas, cum ea nunc obſervatur in ra-
              <lb/>
            tione ſuperficiei corporeæ tantum exiſtere.</s>
            <s xml:id="echoid-s3313" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div101" type="section" level="1" n="101">
          <head xml:id="echoid-head109" xml:space="preserve">EXPERIMENTUM LXXX.</head>
          <p>
            <s xml:id="echoid-s3314" xml:space="preserve">Æqualis vis bonorum Magnetum inermium, non ſenſibiliter inæ-
              <lb/>
            qualium vi, ſimilis figuræ & </s>
            <s xml:id="echoid-s3315" xml:space="preserve">poſitionis, ſed inæqualis magnitudi-
              <lb/>
            nis, eſt aliquando paulum major vel minor, quam in ratione ſuarum
              <lb/>
            Diametrorum.</s>
            <s xml:id="echoid-s3316" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s3317" xml:space="preserve">Memorat Whiſtonus ſe hoc etiam ex variis didiciſſe Experimen-
              <lb/>
            tis; </s>
            <s xml:id="echoid-s3318" xml:space="preserve">attamen fatetur magnam eſſe difficultatem determinandi, an
              <lb/>
            diverſi Magnetes, aut diverſæ partes ejuſdem Magnetis ſint æque
              <lb/>
            bonæ, ut fere perveniri nequeat ad aliquem accuratum ſucceſſum
              <lb/>
            Experimenti.</s>
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