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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            ritate aliisque auxiliis non plus Ferri conorum apicibus applicari po-
              <lb/>
            tuiſſet, præterea ab apicum figura varia oritur magna inter vires at-
              <lb/>
            trahentes differentia, atque hic quid aliud latet ſubtile, quod ma-
              <lb/>
            jori labore eruendum erit poſtea.</s>
            <s xml:id="echoid-s2358" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2359" xml:space="preserve">Nunc videamus quantum variet virium Magneticarum communi-
              <lb/>
            catio poſito alterius figuræ ferro; </s>
            <s xml:id="echoid-s2360" xml:space="preserve">parallelopipeda ſequentibus inſer-
              <lb/>
            vierunt Experimentis, quorum omnium longitudo erat 4 pollicum.</s>
            <s xml:id="echoid-s2361" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2362" xml:space="preserve">3. </s>
            <s xml:id="echoid-s2363" xml:space="preserve">Parallelopipedi primi latitudo erat {48/100} pollicis, altitudo {18/100} poll.
              <lb/>
            </s>
            <s xml:id="echoid-s2364" xml:space="preserve">in quo, lentè & </s>
            <s xml:id="echoid-s2365" xml:space="preserve">aliquoties ſupra eundem polum Magnetis ducto ſe-
              <lb/>
            cundum longitudinem, ita ut latitudine ſua Magnetem attigerit,
              <lb/>
            vis tanta attractrix obſervata fuit, ut ab extremitate plana ſuſpendi
              <lb/>
            potuerit onus 25 granorum: </s>
            <s xml:id="echoid-s2366" xml:space="preserve">Deinde idem parallelopipedum eidem
              <lb/>
            polo Magnetis appoſitum, eadem directione Lapidi affrictum fuit
              <lb/>
            aliquoties, ſed altitudine Magnetem contingente, tum ex eadem
              <lb/>
            extremitate ſuſpenſum fuit pondus ferreum 35 granorum; </s>
            <s xml:id="echoid-s2367" xml:space="preserve">adeo ut
              <lb/>
            cum eodem ferro diverſa vis attractrix communicetur a Magnete,
              <lb/>
            prout hic varium ferri latus attigerit.</s>
            <s xml:id="echoid-s2368" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2369" xml:space="preserve">Secundi parallelopipedi latitudo fuit {39/100} pollic. </s>
            <s xml:id="echoid-s2370" xml:space="preserve">altitudo {13/100} poll.
              <lb/>
            </s>
            <s xml:id="echoid-s2371" xml:space="preserve">quod ſecundum longitudinem ſuper eodem polo Magnetis ductum,
              <lb/>
            ita ut ſua latitudine Lapidem attigerit, ad extremam planamque ſu-
              <lb/>
            perficiem geſtare potuit pondus 145 granorum: </s>
            <s xml:id="echoid-s2372" xml:space="preserve">Deinde eadem di-
              <lb/>
            rectione ſuper eodem polo Magnetis latum, ut altitudine lapidem
              <lb/>
            attigerit, ex extremo eodem geſtavit modo 64 grana.</s>
            <s xml:id="echoid-s2373" xml:space="preserve"/>
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            <s xml:id="echoid-s2374" xml:space="preserve">Tertii parallelopipedi latitudo fuit {25/100} poll. </s>
            <s xml:id="echoid-s2375" xml:space="preserve">altitudo {5/100} poll. </s>
            <s xml:id="echoid-s2376" xml:space="preserve">quod
              <lb/>
            latitudine ſua Magnetem attingens, ſuper eodem ejus polo ductum,
              <lb/>
            tandem ab extremitate geſtavit 267 grana: </s>
            <s xml:id="echoid-s2377" xml:space="preserve">Verum poſtea ſecundum
              <lb/>
            altitudinem ductum, eâque attingens lapidem, modo attrahere potuit
              <lb/>
            grana 57.</s>
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            <s xml:id="echoid-s2379" xml:space="preserve">Corol. </s>
            <s xml:id="echoid-s2380" xml:space="preserve">1. </s>
            <s xml:id="echoid-s2381" xml:space="preserve">Ex hiſce liquet Experimentis Ferrum oblongum & </s>
            <s xml:id="echoid-s2382" xml:space="preserve">pla-
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            num ab eodem polo Magnetis majoribus viribus donari, quam cy-
              <lb/>
            lindricum: </s>
            <s xml:id="echoid-s2383" xml:space="preserve">vires fuiſſe cum parallelopipedis majores communicatas
              <lb/>
            patet, 1°. </s>
            <s xml:id="echoid-s2384" xml:space="preserve">quia primum geſtavit ab extremo ſuo 25 grana: </s>
            <s xml:id="echoid-s2385" xml:space="preserve">cylindrus
              <lb/>
            autem ſecundus modo grana. </s>
            <s xml:id="echoid-s2386" xml:space="preserve">7 {1/2}. </s>
            <s xml:id="echoid-s2387" xml:space="preserve">2°. </s>
            <s xml:id="echoid-s2388" xml:space="preserve">parallelopipedi extremitas erat ſu-
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            perficies plana, nondum deſinens in cuſpidem, cæteroquin plus
              <lb/>
            ponderis geſtaſſet, cum cylindrus ex apice tantum potuit ferre gra-
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            na 1 {9/10} 3°. </s>
            <s xml:id="echoid-s2389" xml:space="preserve">pondus parallelopipedi erat gravius eo cylindri, & </s>
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