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-div111" type="section" level="1" n="111">
          <pb o="143" file="0157" n="157" rhead="DE MAGNETE."/>
        </div>
        <div xml:id="echoid-div112" type="section" level="1" n="112">
          <head xml:id="echoid-head121" xml:space="preserve">EXPERIMENTUM XC.</head>
          <p>
            <s xml:id="echoid-s3535" xml:space="preserve">Extremitas fili ferrei apponatur polo Magnetis, non affricando
              <lb/>
            id, ſed tantum applicando & </s>
            <s xml:id="echoid-s3536" xml:space="preserve">avellendo Magnetem, filum oſtendet
              <lb/>
            per totam longitudinem puncta Magnetica polaria in diverſis locis,
              <lb/>
            quæ vocantur Puncta Conſequentia, quia attrahunt alternatim po-
              <lb/>
            lum Boreum & </s>
            <s xml:id="echoid-s3537" xml:space="preserve">Auſtralem Verſorii, cujus apex lente ſecundum lon-
              <lb/>
            gitudinem fili promovetur ad diſtantiam {1/2} pollicis.</s>
            <s xml:id="echoid-s3538" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s3539" xml:space="preserve">Verſorium novum, modo ante igni commiſſum, & </s>
            <s xml:id="echoid-s3540" xml:space="preserve">nondum vi-
              <lb/>
            ribus Magneticis imprægnatum, 12 {1/2} pollices longum, erat mihi ad
              <lb/>
            manus, quod loco fili vel virgæ ferreæ ſumſi; </s>
            <s xml:id="echoid-s3541" xml:space="preserve">id ſupra pin-
              <lb/>
            nam mobiliſſimum, a viribus Magneticis exiguis e quiete
              <lb/>
            turbabatur: </s>
            <s xml:id="echoid-s3542" xml:space="preserve">Secundum hujus longitudinem tenui duxique apicem
              <lb/>
            Verſorii Boreum, quod Magneti affrictum fuit, tumque 6 Puncta
              <lb/>
            Conſequentia obſervabantur: </s>
            <s xml:id="echoid-s3543" xml:space="preserve">apex novi Verſorii attrahebatur, locus
              <lb/>
            1 {1/2} pollice inde diſtans repellebatur, eratque quidem 6 pollices la-
              <lb/>
            tus; </s>
            <s xml:id="echoid-s3544" xml:space="preserve">tum iterum dabatur locus attrahens, tum iterum repellens, at-
              <lb/>
            trahebatur plage ſequens, repellebatur tandem altera extremitas:
              <lb/>
            </s>
            <s xml:id="echoid-s3545" xml:space="preserve">ſed apice Auſtrali ducto ſecundum longitudinem Verſorii novi, ob-
              <lb/>
            ſervabantur modo tria Puncta Conſequentia, atque in aliis locis
              <lb/>
            quam in quibus antea Puncta conſequentia animadverteram; </s>
            <s xml:id="echoid-s3546" xml:space="preserve">extre-
              <lb/>
            mitas enim novi Verſorii repellebatur, quæ repulſio per 1 {1/2} pollicem
              <lb/>
            durabat, tum ſequebatur attractio exigua; </s>
            <s xml:id="echoid-s3547" xml:space="preserve">ſed ad finem fere perdu-
              <lb/>
            rans, tum fortiſſima attractio a priori diſtincta: </s>
            <s xml:id="echoid-s3548" xml:space="preserve">quæ omnia longe
              <lb/>
            clarius conſpiciebantur, poſtquam Apex novi Verſorii polo Magnetis
              <lb/>
            femel applicatus fuerat.</s>
            <s xml:id="echoid-s3549" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s3550" xml:space="preserve">Primi hoc Experimentum deſcripſerunt Cl. </s>
            <s xml:id="echoid-s3551" xml:space="preserve">Diſaguillierius & </s>
            <s xml:id="echoid-s3552" xml:space="preserve">Nob.
              <lb/>
            </s>
            <s xml:id="echoid-s3553" xml:space="preserve">Taylor in Philoſ. </s>
            <s xml:id="echoid-s3554" xml:space="preserve">Tranſ. </s>
            <s xml:id="echoid-s3555" xml:space="preserve">N°. </s>
            <s xml:id="echoid-s3556" xml:space="preserve">368, hic 5 Acus Chalybeas, 2 polliceslon-
              <lb/>
            gas, quarum extremitates Magneti antea applicatæ fuerant, impoſuit. </s>
            <s xml:id="echoid-s3557" xml:space="preserve">
              <lb/>
            Aquæ ſtagnanti, atque Verſorii cuſpidem ſecundum harum lon-
              <lb/>
            gitudinem promovit, ita tamen ut eas non attingeret, tum â pun-
              <lb/>
            ctis notatis in Tab. </s>
            <s xml:id="echoid-s3558" xml:space="preserve">5. </s>
            <s xml:id="echoid-s3559" xml:space="preserve">fig. </s>
            <s xml:id="echoid-s3560" xml:space="preserve">5. </s>
            <s xml:id="echoid-s3561" xml:space="preserve">attrahebatur Verſorii polus Auſtralis
              <lb/>
            vel Septentrionalis, prout litteræ A & </s>
            <s xml:id="echoid-s3562" xml:space="preserve">S. </s>
            <s xml:id="echoid-s3563" xml:space="preserve">indicant: </s>
            <s xml:id="echoid-s3564" xml:space="preserve">In ſuprema Acu
              <lb/>
            obſervabantur 5 poli, quemadmodum quoque in ſecunda, inter
              <lb/>
            quas intercedit differentia hæc tantum; </s>
            <s xml:id="echoid-s3565" xml:space="preserve">quod unius extrema ambo
              <lb/>
            attrahant polum Septentrionalem. </s>
            <s xml:id="echoid-s3566" xml:space="preserve">In tertiâ 6 dantur poli, in quarta
              <lb/>
            7, in quinta 4.</s>
            <s xml:id="echoid-s3567" xml:space="preserve"/>
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