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="35" file="0049" n="49" rhead="DE MAGNETE."/>
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        <div xml:id="echoid-div22" type="section" level="1" n="22">
          <head xml:id="echoid-head29" xml:space="preserve">CAPUT II.</head>
          <head xml:id="echoid-head30" style="it" xml:space="preserve">DE ACTIONE MAGNETIS IN FERRUM.</head>
          <p>
            <s xml:id="echoid-s805" xml:space="preserve">Si Magnes longo alligatus funi ſuspendatur ex Bilance, uti in
              <lb/>
            ſuperioribus Experimentis factum fuit, atque æquipondio
              <lb/>
            oppoſitæ Lanci immiſſo reducatur ad æquilibrium, tum maſſa
              <lb/>
            ferri immobilis ponatur infra Magnetem in linea perpendicula-
              <lb/>
            ri ad horizontem, quæ per ferrum & </s>
            <s xml:id="echoid-s806" xml:space="preserve">Magnetem tranſit, & </s>
            <s xml:id="echoid-s807" xml:space="preserve">ad di-
              <lb/>
            ſtantiam paucorum pollicum a ſe mutuo, deſcendet Magnes verſus fer-
              <lb/>
            rum, & </s>
            <s xml:id="echoid-s808" xml:space="preserve">quaſi</s>
          </p>
        </div>
        <div xml:id="echoid-div23" type="section" level="1" n="23">
          <head xml:id="echoid-head31" style="it" xml:space="preserve">Flagrat anbela ſilex, & amicam ſaucia ſentit
            <lb/>
          Materiam, placidosque chalybs cognoſcit amores.</head>
          <p>
            <s xml:id="echoid-s809" xml:space="preserve">Si tamen eum retinere velimus in eadem a ferro diſtantia, erunt
              <lb/>
            plurima pondera lanci Libræ imponenda, quæ ſua gravitate Magne-
              <lb/>
            tem elevent, atque tantum a ferro avellant, quantum Magnes ſua
              <lb/>
            vi ad illud accedit: </s>
            <s xml:id="echoid-s810" xml:space="preserve">pondus quod de novo Lanci immittitur ultra
              <lb/>
            primum æquilibrium, demonſtrat quanta ſit Attractio Magnetis ad
              <lb/>
            ferrum, quamobrem beneficio hujus artificii addiſcimus modum de-
              <lb/>
            terminandi vires magneticas in ferrum ad varias a ſe mutuo diſtan-
              <lb/>
            tias.</s>
            <s xml:id="echoid-s811" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s812" xml:space="preserve">Quocunque modo Magnes convertatur, manens Libræ alligatus,
              <lb/>
            ſemper ad ferrum accedit.</s>
            <s xml:id="echoid-s813" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s814" xml:space="preserve">Hoc Experimentum probat, Magnetem non tantum agere in ali-
              <lb/>
            um Magnetem, ſed quoque in ferrum: </s>
            <s xml:id="echoid-s815" xml:space="preserve">Hoc non adeo mirandum
              <lb/>
            eſt; </s>
            <s xml:id="echoid-s816" xml:space="preserve">Quia Magnes eſt modo lapis, conſtans ex ferro bono cum in-
              <lb/>
            termiſtis partibus terreis: </s>
            <s xml:id="echoid-s817" xml:space="preserve">Lapis hic vim non habet quatenus compo-
              <lb/>
            nitur ex mera terra, ſed quatenus aliquam terram & </s>
            <s xml:id="echoid-s818" xml:space="preserve">ſimul ferrum
              <lb/>
            poſſidet; </s>
            <s xml:id="echoid-s819" xml:space="preserve">unde eo præſtantiorum eſt virium, quo plus ferri habet,
              <lb/>
            & </s>
            <s xml:id="echoid-s820" xml:space="preserve">quo gravior eſt: </s>
            <s xml:id="echoid-s821" xml:space="preserve">ferreas particulas vim Lapidi adferre, proba-
              <lb/>
            ri poſſet facile, nam quando ferrum Lapidi infixum diu per plu-
              <lb/>
            res annos fuit, & </s>
            <s xml:id="echoid-s822" xml:space="preserve">rubigine corroſæ partes permearunt lapidis poros,
              <lb/>
            Lapis evaſit Magnes, uti experientia frequenti conſtare ſupra </s>
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