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-div158" type="section" level="1" n="158">
          <head xml:id="echoid-head168" xml:space="preserve">EXPERIMENTUM CXXXI.</head>
          <p>
            <s xml:id="echoid-s6007" xml:space="preserve">Virga ferrrea, cylindrica, diametri {1/12} poll. </s>
            <s xml:id="echoid-s6008" xml:space="preserve">ſed 6 longa, impo-
              <lb/>
            ſita fuit Igni luculento, ut ſecundum longitudinem in Meridiano
              <lb/>
            per Boream & </s>
            <s xml:id="echoid-s6009" xml:space="preserve">Auſtrum tranſeunte jaceret: </s>
            <s xml:id="echoid-s6010" xml:space="preserve">Ignis non erat exſtru-
              <lb/>
            ctus in loco prope Ferrum, ſed ubi modo lapides dabantur, ne vis
              <lb/>
            Ferri alterius Experimentum turbaret: </s>
            <s xml:id="echoid-s6011" xml:space="preserve">probe per totam longitudi-
              <lb/>
            nem candefacta, forcipe æneo, & </s>
            <s xml:id="echoid-s6012" xml:space="preserve">leni motu abſque ulla concuſſio-
              <lb/>
            ne, ex Igne exemta, atque horizontaliter retenta, admovebatur
              <lb/>
            illico admodum mobili Verſorio, vi donato Magnetica; </s>
            <s xml:id="echoid-s6013" xml:space="preserve">ita autem
              <lb/>
            movebatur, ut manſerit in eodem Meridiano; </s>
            <s xml:id="echoid-s6014" xml:space="preserve">tum vero Virgæ
              <lb/>
            cuſpis Auſtralis attrahebat polum Verſorii Boreum; </s>
            <s xml:id="echoid-s6015" xml:space="preserve">& </s>
            <s xml:id="echoid-s6016" xml:space="preserve">ejuſdem Vir-
              <lb/>
            gæ, ſed converſæ cuſpis Borealis attraxit quoque polum Verſorii
              <lb/>
            Boreum.</s>
            <s xml:id="echoid-s6017" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6018" xml:space="preserve">2. </s>
            <s xml:id="echoid-s6019" xml:space="preserve">Loco hujus tenuis Virgæ alia duplo craſſioris diametri & </s>
            <s xml:id="echoid-s6020" xml:space="preserve">10
              <lb/>
            longa pollices, novo tentamini inſerviit, hæc in Igne probe can-
              <lb/>
            defacta, deinde exemta, atque Verſorio oppoſita, ſuis extremita-
              <lb/>
            tibus eoſdem effectus Attractionis oſtendit, ac prior.</s>
            <s xml:id="echoid-s6021" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6022" xml:space="preserve">3. </s>
            <s xml:id="echoid-s6023" xml:space="preserve">Imo dedit plane eosdem eventus parallelopipedum ferreum,
              <lb/>
            5 pollices longum, baſeos quadratæ unius pollicis.</s>
            <s xml:id="echoid-s6024" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6025" xml:space="preserve">Hæc tentamina capi modo potuerunt cum Verſorio capſulæ
              <lb/>
            æneæ vitro tectæ incluſo, Ignis enim ex ferramentis explorandis
              <lb/>
            tanto cum impetu egreditur Verſoriumque concutit, nudum, ut
              <lb/>
            ipſi tremores, oſcillationes, motuſque alios inordinatos inducat,
              <lb/>
            impedientes, quominus aliquid obſervetur attractionem ſpe-
              <lb/>
            ctans.</s>
            <s xml:id="echoid-s6026" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6027" xml:space="preserve">Agit ergo vis Magnetica, ſive in lapidea ſive in ferrea ſubſtantia
              <lb/>
            hæſerit, in Ferrum ignitum, illud attrahendo, Magnetem enim
              <lb/>
            Ferrum candefactum attrahere confirmarunt Colepreſſius in Philoſ.
              <lb/>
            </s>
            <s xml:id="echoid-s6028" xml:space="preserve">Tranſ. </s>
            <s xml:id="echoid-s6029" xml:space="preserve">tum Mullerus in Colleg. </s>
            <s xml:id="echoid-s6030" xml:space="preserve">Phyſ. </s>
            <s xml:id="echoid-s6031" xml:space="preserve">pag. </s>
            <s xml:id="echoid-s6032" xml:space="preserve">229, & </s>
            <s xml:id="echoid-s6033" xml:space="preserve">noſtra Expe-
              <lb/>
            rimenta in Cap. </s>
            <s xml:id="echoid-s6034" xml:space="preserve">2. </s>
            <s xml:id="echoid-s6035" xml:space="preserve">allata: </s>
            <s xml:id="echoid-s6036" xml:space="preserve">nunc obſervamus vim Magneticam Ver-
              <lb/>
            ſorii in Ferrum Ignitum operari, contra Gilbertum, id negantem
              <lb/>
            Lib. </s>
            <s xml:id="echoid-s6037" xml:space="preserve">2. </s>
            <s xml:id="echoid-s6038" xml:space="preserve">Cap 2. </s>
            <s xml:id="echoid-s6039" xml:space="preserve">pag. </s>
            <s xml:id="echoid-s6040" xml:space="preserve">52.</s>
            <s xml:id="echoid-s6041" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6042" xml:space="preserve">2. </s>
            <s xml:id="echoid-s6043" xml:space="preserve">Notamusvim directricem in Ferro ignito non dari, nam ſi polos
              <lb/>
            habuiſſet Ferrum candens, non attraxiſſet indifferentur </s>
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