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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            <s xml:id="echoid-s1819" xml:space="preserve">
              <pb o="76" file="0090" n="90" rhead="DISSERTATIO"/>
            hanc Dei operationem in Magnetem quoque probare non poſſu-
              <lb/>
            mus, licet certo certius ad Deum uſque perventuri ſimus ſequen-
              <lb/>
            do effectuum cauſas, atque in eo, vere cauſâ omnium rerum
              <lb/>
            prima, determinaremur: </s>
            <s xml:id="echoid-s1820" xml:space="preserve">videtur profecto inter Deum ut cauſam
              <lb/>
            & </s>
            <s xml:id="echoid-s1821" xml:space="preserve">inter vires Magnetis, alia adhuc intercedere cauſa, nam idem
              <lb/>
            Magnes vires acquirit vel amittit pro diverſo ſitu quem tenuit:
              <lb/>
            </s>
            <s xml:id="echoid-s1822" xml:space="preserve">Vires in igne amittit quodammodo: </s>
            <s xml:id="echoid-s1823" xml:space="preserve">Ferrum cudendo acquirit vi-
              <lb/>
            res, & </s>
            <s xml:id="echoid-s1824" xml:space="preserve">prout plus cuditur, eo majores, quæ in me ſuſpicionem
              <lb/>
            alterius cauſæ intercedentis excitant. </s>
            <s xml:id="echoid-s1825" xml:space="preserve">Præteribo plures aliorum
              <lb/>
            Philoſophorum abſonas Hypotheſes, quæ apud Gilbertum: </s>
            <s xml:id="echoid-s1826" xml:space="preserve">Lib. </s>
            <s xml:id="echoid-s1827" xml:space="preserve">
              <lb/>
            1. </s>
            <s xml:id="echoid-s1828" xml:space="preserve">Cap. </s>
            <s xml:id="echoid-s1829" xml:space="preserve">1. </s>
            <s xml:id="echoid-s1830" xml:space="preserve">& </s>
            <s xml:id="echoid-s1831" xml:space="preserve">Cabeum in Lib. </s>
            <s xml:id="echoid-s1832" xml:space="preserve">2 Cap. </s>
            <s xml:id="echoid-s1833" xml:space="preserve">2. </s>
            <s xml:id="echoid-s1834" xml:space="preserve">videri poſſunt.</s>
            <s xml:id="echoid-s1835" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1836" xml:space="preserve">Si quis hæc ſerio ſecum conſideraverit, facile perſpiciet, quan-
              <lb/>
            tum abſumus a cognitione Naturæ corporum, quam quidam ſibi
              <lb/>
            perſpectam jactitant, quaſi in hoc alterove attributo univerſali
              <lb/>
            hæreret; </s>
            <s xml:id="echoid-s1837" xml:space="preserve">hi vires ſuas explorent, an è Natura corporum ſibi, ut
              <lb/>
            opinantur, cognita, etiam Naturam Magnetis, Naturam ejus vi-
              <lb/>
            rium deducere queant, non hypotheſes nobis obtrudendo, ut fieri
              <lb/>
            ſolet, ſed probas demonſtrationes concinnando.</s>
            <s xml:id="echoid-s1838" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1839" xml:space="preserve">Unica via detegendi Magnetis cauſam hæc fupereſt, ut Philoſo-
              <lb/>
            phi, abjecta libidine hypotheſes fingendi, quod ſatis repeti & </s>
            <s xml:id="echoid-s1840" xml:space="preserve">in-
              <lb/>
            culcari nequit, capiendis Experimentis, adnotandisque Magnetis
              <lb/>
            effectibus dent operam, ipſi manum labori admoveant, nec tantum
              <lb/>
            ſedeant meditabundi in Muſæis, recte enim Sapiens Reaumurius
              <lb/>
            animadvertit, eo modo in genere nimis excoli Phyſicam, & </s>
            <s xml:id="echoid-s1841" xml:space="preserve">per-
              <lb/>
            verſe: </s>
            <s xml:id="echoid-s1842" xml:space="preserve">tum autem ſpes affulget, aliquando datum iri aliquem tam
              <lb/>
            felicem, qui ex inter ſe plurimis comparatis Magnetis operationi-
              <lb/>
            bus, manifeſto earum cauſam demonſtrabit; </s>
            <s xml:id="echoid-s1843" xml:space="preserve">tumque poſteritas ad-
              <lb/>
            mirabitur nos tam aperta, quæ ſe ſua ſponte offerunt, & </s>
            <s xml:id="echoid-s1844" xml:space="preserve">quibus
              <lb/>
            hac tempeſtate adeo propinqui fuimus, neſciviſſe.</s>
            <s xml:id="echoid-s1845" xml:space="preserve"/>
          </p>
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        <div xml:id="echoid-div38" type="section" level="1" n="38">
          <head xml:id="echoid-head46" xml:space="preserve">EXPERIMENTUM XXX.</head>
          <p>
            <s xml:id="echoid-s1846" xml:space="preserve">Quoniam ope Analyſeos Chemicæ non raro detegimus partes di-
              <lb/>
            verſas, quæ corpora majora componunt; </s>
            <s xml:id="echoid-s1847" xml:space="preserve">Magnetem etiam hac me-
              <lb/>
            thodo examinare ſtatuebam, ſuſpicatus hoc corpus non ſimplex eſſe,
              <lb/>
            ſed ex pluribus diverſis conflatum, quæ ſi ſeparare a ſe mutuo </s>
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