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-div31" type="section" level="1" n="31">
          <pb o="57" file="0071" n="71" rhead="DE MAGNETE."/>
        </div>
        <div xml:id="echoid-div32" type="section" level="1" n="32">
          <head xml:id="echoid-head40" xml:space="preserve">EXPERIMENTUM XXIV.</head>
          <p>
            <s xml:id="echoid-s1320" xml:space="preserve">Quoniam plurimorum Eruditorum animis inſedit opinio, effectus
              <lb/>
            Magnetum in ſe mutuo pendere ab Effluviis ſubtilibus ab omni late-
              <lb/>
            re continuo egredientibus, aut a fluido Æthereo Magnetes undiqua-
              <lb/>
            que ambiente, premente aut propellente tum eos ſe invicem verſus,
              <lb/>
            tum Ferrum, tum alia Corpora, quæ ab iis attrahuntur, ſedulo in-
              <lb/>
            veſtigavi, quibusnam innixa argumentis hæc opinio foret; </s>
            <s xml:id="echoid-s1321" xml:space="preserve">excutien-
              <lb/>
            ti apparuerunt nulla, aut adeo imbecillia, ut temeritatis merito ar-
              <lb/>
            guerer, ſi abſque aliis, firmioribusque ratiociniis Effluvia Magneti-
              <lb/>
            ca, aut Æthereum fluidum cauſam effectuum Magneticorum ſtatuiſ-
              <lb/>
            ſem: </s>
            <s xml:id="echoid-s1322" xml:space="preserve">poſtquam vero manum operi admovendo, Effluvia aut Æthe-
              <lb/>
            rem quærere incepi, nulla ſeſe obtulerunt Experimenta, ex quibus
              <lb/>
            vel minima eorum ſuſpicio foveri poſſet, è contrario ea prodierunt
              <lb/>
            data, quæ me penitus convicerunt, nec Effluviis nec Æthere regi
              <lb/>
            Magnetes, nec poſſe. </s>
            <s xml:id="echoid-s1323" xml:space="preserve">Ut hoc clare appareat, ſupponamus ex Ma-
              <lb/>
            gnete Effluvia exire, quæ effluendo repulſionis, & </s>
            <s xml:id="echoid-s1324" xml:space="preserve">affluendo attra-
              <lb/>
            ctionis ſint cauſæ, atque ante oculos poſitum fingamus Magnetem
              <lb/>
            ſuſpenſum ex libra accuratiſſima, in Tab. </s>
            <s xml:id="echoid-s1325" xml:space="preserve">2. </s>
            <s xml:id="echoid-s1326" xml:space="preserve">fig. </s>
            <s xml:id="echoid-s1327" xml:space="preserve">2. </s>
            <s xml:id="echoid-s1328" xml:space="preserve">alterumque in-
              <lb/>
            fra ipſum ſupra menſam locatum; </s>
            <s xml:id="echoid-s1329" xml:space="preserve">Effluvia ex utroque libere egre-
              <lb/>
            dientur, regredientur, atque vi maximâ ſe Magnetes at-
              <lb/>
            trahent: </s>
            <s xml:id="echoid-s1330" xml:space="preserve">verum concipiamus nunc corpus ſolidum denſumque
              <lb/>
            inter eos interponi, an Effluvia utriuſque Magnetis in hoc non incur-
              <lb/>
            rent, nonneintercipientur, & </s>
            <s xml:id="echoid-s1331" xml:space="preserve">aliorſum determinabuntur, atque ita At-
              <lb/>
            tractio aut Repulſio ſublata erit? </s>
            <s xml:id="echoid-s1332" xml:space="preserve">novi equidem regeri poſſe, omnia
              <lb/>
            corpora eſſe admodum poroſa, Effluvia valde ſubtilia, ita ut poros fa-
              <lb/>
            cile permeare poſſint, atque Attractionem & </s>
            <s xml:id="echoid-s1333" xml:space="preserve">Repulſionem eodem mo-
              <lb/>
            do obſervandam eſſe, ac ſi nihil inter Magnetes fuiſſet interpoſitum:
              <lb/>
            </s>
            <s xml:id="echoid-s1334" xml:space="preserve">concedendum eſt, firma quæcunque corpora plurimis eſſe pertuſa po-
              <lb/>
            ris, nihilominus conſtant ex plurimis quoque partibus ſolidis, im-
              <lb/>
            penetrabilibus, & </s>
            <s xml:id="echoid-s1335" xml:space="preserve">proinde Effluvia intercipientibus, quæ in ipſas
              <lb/>
            moventur: </s>
            <s xml:id="echoid-s1336" xml:space="preserve">quo corpora graviora ſunt, eo ſunt ſolidiora, & </s>
            <s xml:id="echoid-s1337" xml:space="preserve">mi-
              <lb/>
            nus poroſa, hæc intercipient longe plura Effluvia aliorum corporum,
              <lb/>
            utcunque ſubtilia fuerint: </s>
            <s xml:id="echoid-s1338" xml:space="preserve">Odores quicunque non tranſeunt per po-
              <lb/>
            ros vitrorum, metallorum, ſaxorum, aliorumque ſolidorum </s>
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