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-div106" type="section" level="1" n="106">
          <head xml:id="echoid-head115" xml:space="preserve">EXPERIMENTUM LXXXIV.</head>
          <p>
            <s xml:id="echoid-s3450" xml:space="preserve">Tab. </s>
            <s xml:id="echoid-s3451" xml:space="preserve">7. </s>
            <s xml:id="echoid-s3452" xml:space="preserve">fig. </s>
            <s xml:id="echoid-s3453" xml:space="preserve">6. </s>
            <s xml:id="echoid-s3454" xml:space="preserve">Magnetis rotundi A B E F axis ſit C D, C polus
              <lb/>
            Auſtralis, D Boreus, dividatur Magnes bifariam ſectione per axem
              <lb/>
            tranſeunte, habebit pars C O A B P D polum Auſtralem in O, Bo-
              <lb/>
            reum in P: </s>
            <s xml:id="echoid-s3455" xml:space="preserve">ſegmentum C X E F Z D habebit polum Auſtralem in
              <lb/>
            X & </s>
            <s xml:id="echoid-s3456" xml:space="preserve">Boreum in Z.</s>
            <s xml:id="echoid-s3457" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s3458" xml:space="preserve">Retinent igitur hæc ſegmenta eoſdem polos, quibus antea dona-
              <lb/>
            ta erant, ſola mutatio in eorum axe contingit, qui fit X Z, & </s>
            <s xml:id="echoid-s3459" xml:space="preserve">
              <lb/>
            O P, tranſeundo per medium cujuſlibet ſegmenti: </s>
            <s xml:id="echoid-s3460" xml:space="preserve">idem obtinetin omni
              <lb/>
            ſectione parallelâ ad axim: </s>
            <s xml:id="echoid-s3461" xml:space="preserve">ergo patet totum latus E X C O A eſſe
              <lb/>
            polare, & </s>
            <s xml:id="echoid-s3462" xml:space="preserve">eodem modo conſtructum, cæteroquin videri poſſet,
              <lb/>
            quaſi plagæ quædam, quales hic C & </s>
            <s xml:id="echoid-s3463" xml:space="preserve">D, ſoli forent poli, cum quod-
              <lb/>
            libet punctum lateris A C E, aut B D F polare ſit, ſed in Magnete
              <lb/>
            integro poli C & </s>
            <s xml:id="echoid-s3464" xml:space="preserve">D, erant concurſus virium, ſive centrum polorum
              <lb/>
            ab utroque latere.</s>
            <s xml:id="echoid-s3465" xml:space="preserve"/>
          </p>
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        <div xml:id="echoid-div107" type="section" level="1" n="107">
          <head xml:id="echoid-head116" xml:space="preserve">EXPERIMENTUM LXXXV.</head>
          <p>
            <s xml:id="echoid-s3466" xml:space="preserve">Tab. </s>
            <s xml:id="echoid-s3467" xml:space="preserve">7. </s>
            <s xml:id="echoid-s3468" xml:space="preserve">fig. </s>
            <s xml:id="echoid-s3469" xml:space="preserve">7. </s>
            <s xml:id="echoid-s3470" xml:space="preserve">Duorum Magnetum A B, a b poli Auſtrales ſint
              <lb/>
            A, a, Borei B, b, hi in eodem plano horizontali poſiti, ad ſe
              <lb/>
            accedere queant, tum polus Boreus unius attrahet, ſibique junget,
              <lb/>
            polum Auſtralem alterius: </s>
            <s xml:id="echoid-s3471" xml:space="preserve">ideo ſi Tab. </s>
            <s xml:id="echoid-s3472" xml:space="preserve">7. </s>
            <s xml:id="echoid-s3473" xml:space="preserve">fig. </s>
            <s xml:id="echoid-s3474" xml:space="preserve">8. </s>
            <s xml:id="echoid-s3475" xml:space="preserve">Magnes A B ſu-
              <lb/>
            pra alterum a b teneatur, & </s>
            <s xml:id="echoid-s3476" xml:space="preserve">alteruter libere converti poſſit, con-
              <lb/>
            vertetur, ut polus Auſtralis A ſit directe ſub polo Boreo b, & </s>
            <s xml:id="echoid-s3477" xml:space="preserve">po-
              <lb/>
            lus Boreus B ſub Auſtrali a.</s>
            <s xml:id="echoid-s3478" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s3479" xml:space="preserve">Ne alicui hæc converſio mira videatur, patebit intuenti Magnetem
              <lb/>
            ante unitum, ſed nunc diſſectum, partes hoc ordine habuiſſe compoſi-
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            tas; </s>
            <s xml:id="echoid-s3480" xml:space="preserve">ſi enim ambo Magnetes AB, a b conſtituiſſent antea maſſam unam,
              <lb/>
            nonne pars a adhæſiſſet parti B, atque hæ ambæ partes ſe attraxiſ-
              <lb/>
            ſent: </s>
            <s xml:id="echoid-s3481" xml:space="preserve">verum an hæ nunc ſolutæ non iterum ſe attrahent? </s>
            <s xml:id="echoid-s3482" xml:space="preserve">adeoque
              <lb/>
            poli nominis alterni ſe conjungent; </s>
            <s xml:id="echoid-s3483" xml:space="preserve">poli cognomines, uti bini Borei
              <lb/>
            vel bini Auſtrales ſe mutuo fugabunt, hi enim nunquam natura-
              <lb/>
            liter in Magnete cohæſerunt.</s>
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