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-div97" type="section" level="1" n="97">
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              <pb o="134" file="0148" n="148" rhead="DISSERTATIO"/>
            tio quoque pro nobis militat, cum enim vis Magnetica concentra-
              <lb/>
            tur in pede armaturæ ita, ut multo plus Ferri ab eo, quam ab ipſo
              <lb/>
            Magnete ſuſtineri poſſit, nonne etiam plus virtutis in lamellam
              <lb/>
            affrictam tranſibit, quemadmodum a fortiori Magnete plerumque
              <lb/>
            fieri ſolet?</s>
            <s xml:id="echoid-s3293" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div98" type="section" level="1" n="98">
          <head xml:id="echoid-head106" xml:space="preserve">EXPERIMENTUM LXXVII.</head>
          <p>
            <s xml:id="echoid-s3294" xml:space="preserve">Si utrique pedi armaturæ adhæſerit lamella ferrea, atque in eo-
              <lb/>
            dem plano cum armaturâ & </s>
            <s xml:id="echoid-s3295" xml:space="preserve">lamellâ fuerit Acus verſatilis Nautica,
              <lb/>
            qui diſtat â Magnete, jacetque in perpendiculari inter utroſque pedes
              <lb/>
            media, hæc nequaquam in tam longa diſtantia â Magnete movebitur,
              <lb/>
            quam ſi Magnes inermis fuiſſet, aut armatura non geſtaſſet lamel-
              <lb/>
            lam.</s>
            <s xml:id="echoid-s3296" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s3297" xml:space="preserve">Quod fit, quia vis Magnetis operatur in lamellam pedibus appli-
              <lb/>
            catam, unde nequaquam ad tantam longitudinem extenditur, quam
              <lb/>
            ſi nulla ferrea lamella adſit.</s>
            <s xml:id="echoid-s3298" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div99" type="section" level="1" n="99">
          <head xml:id="echoid-head107" xml:space="preserve">EXPERIMENTUM LXXVIII.</head>
          <p>
            <s xml:id="echoid-s3299" xml:space="preserve">Si Ferrum ſecundum longitudinem ſuamaſſricetur utrique pedi Ar-
              <lb/>
            maturæ ſimul, non tantas viresattrahendi acquirit, quam ſi uni tan-
              <lb/>
            tum pedi affricetur.</s>
            <s xml:id="echoid-s3300" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s3301" xml:space="preserve">Quia Ferrum ab utroque polo directionis vires acquirit contra-
              <lb/>
            rias, quibus ſe deſtruentibus, minor earum copia in Ferro remanet:
              <lb/>
            </s>
            <s xml:id="echoid-s3302" xml:space="preserve">quare ut Ferrum magna vi imbuatur, ſupra unum polum pedemve
              <lb/>
            Magnetis modo fricandum erit.</s>
            <s xml:id="echoid-s3303" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div100" type="section" level="1" n="100">
          <head xml:id="echoid-head108" xml:space="preserve">EXPERIMENTUM. LXXIX.</head>
          <p>
            <s xml:id="echoid-s3304" xml:space="preserve">Vis attrahens variorum Magnetum armatorum in elevando fer-
              <lb/>
            reo pondere, eſt cæteris paribus in ratione duplicata Diametrorum,
              <lb/>
            aut in ratione ſuperficierum.</s>
            <s xml:id="echoid-s3305" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s3306" xml:space="preserve">Whiſtonus in Tractatu of the dipping Needle, pag. </s>
            <s xml:id="echoid-s3307" xml:space="preserve">11. </s>
            <s xml:id="echoid-s3308" xml:space="preserve">hanc pro-
              <lb/>
            portionem commemorat repertam a Nobiliſſimo Viro Paisley; </s>
            <s xml:id="echoid-s3309" xml:space="preserve">cum
              <lb/>
            enim vis ex ſuperficie Magnetis exeat, quo atmatura majorem </s>
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