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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[Item 1.]
[2.] PETRI VAN MUSSCHENBROEK A. L. M. Med. & Phil. D. Phil. & Matheſ. Profeſſ. in Acad. Ultraj. PHYSICÆ EXPERIMENTALES, ET GEOMETRICÆ, DE MAGNETE, TUBORUM CAPILLARIUM VITREORUM-QUE SPECULORUM ATTRACTIONE, MAGNITUDINE TERRÆ, COHÆRENTIA CORPORUM FIRMORUM DISSERTATIONES: UTET EPHEMERIDES METEOROLOGICÆ ULTRAJECTINÆ.
[3.] LUGDUNI BATAVORUM, Apud SAMUELEM LUCHTMANS, MDCCXXIX.
[4.] NOBILISSIMIS ET AMPLISSIMIS VIRIS LUCÆ VAN VOORST, JCTO. ET HENRICO VAN SOESTDYK, INCLYTÆ URBIS TRAJECTINÆ CONSULIBUS, HAS DISSERTATIONES EA QUA PAR EST OBSERVANTIA D. D. D. PETRUS VAN MUSSCHENBROEK.
[5.] LECTORI SALUTEM.
[6.] ERRATA TYPOGRAPHICA.
[7.] Berigt voor den Boekbinder.
[8.] DISSERTATIO PHYSICA EXPERIMENTALIS DE MAGNETE. PRÆFATIO.
[9.] Ex Ferro meruit vitam, ferrique rigore Veſcitur, has dulces epulas, hæc pabula novit.
[10.] DISSERTATIO PHYSICA EXPERIMENTALIS DE MAGNETE. CAPUT I. DE ACTIONE MAGNETUM IN SE MUTUO.
[11.] EXPERIMENTUMI
[12.] EXPERIMENTUM II.
[13.] EXPERIMENTUM III.
[14.] EXPERIMENTUM IV.
[15.] EXPERIMENTUM V.
[16.] EXPERIMENTUM VI.
[17.] EXPERIMENTUM VII. & VIII.
[18.] EXPERIMENTUM IX, X, XI, XII.
[19.] EXPERIMENTUM XIII.
[20.] EXPERIMENTUM XIV.
[21.] EXPERIMENTUM XV.
[22.] CAPUT II. DE ACTIONE MAGNETIS IN FERRUM.
[23.] Flagrat anbela ſilex, & amicam ſaucia ſentit Materiam, placidosque chalybs cognoſcit amores.
[24.] EXPERIMENTUM XVI.
[25.] EXPERIMENTUM XVII.
[26.] EXPERIMENTUM XVIII.
[27.] EXPERIMENTUM XIX.
[28.] EXPERIMENTUM XX.
[29.] EXPERIMENTUM XXI.
[30.] EXPERIMENTUM XXII.
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            perimentum capiebam, inſtruxeram, obſervavique omnino Libram
              <lb/>
            a parte appenſæ virgæ leviorem eſſe redditam, imprimis poſtquam
              <lb/>
            aliquamdiu exſpectaveram; </s>
            <s xml:id="echoid-s1613" xml:space="preserve">unde concludebam Whiſtonum recte
              <lb/>
            animadvertiſſe Ferrum Magneti affrictum fieri levius, ſed neſcio quo
              <lb/>
            caſu diutius exſpectabam, ut accuratius differentiam ponderis nota-
              <lb/>
            rem, vidique tum perpetuo Libram ab eadem parte leviorem fieri;
              <lb/>
            </s>
            <s xml:id="echoid-s1614" xml:space="preserve">omnia hæc tum ſibi commiſi uſque in ſequentem diem, quo Libra
              <lb/>
            ab eadem parte non levior erat utante, ſed præponderabat, ex qui-
              <lb/>
            bus manifeſto apparebat hanc ponderis diverſitatem pendere ab
              <lb/>
            humido in fune hærente & </s>
            <s xml:id="echoid-s1615" xml:space="preserve">expulſo ab Igne, poſteroque die quo
              <lb/>
            ignis aberat, iterumſe inſinuante. </s>
            <s xml:id="echoid-s1616" xml:space="preserve">Unde poſtea ſemper inſtitui expe-
              <lb/>
            rimenta ſuſpendendo virgas ferreas ex filo æneo; </s>
            <s xml:id="echoid-s1617" xml:space="preserve">(Lances Libræ
              <lb/>
            ob idem incommodum diu ante a me obſervatum, ex catenis æneis
              <lb/>
            ſemper ſuſpenſæ quoque fuerunt) tumque nunquam aliquam ponderis
              <lb/>
            varietatem vidi, & </s>
            <s xml:id="echoid-s1618" xml:space="preserve">ne aliquid in hoc tentamine omitteretur, non
              <lb/>
            modo virgas uno ſuſpendi modo, ſed poſtea quoque inverſas iterum
              <lb/>
            ponderavi, præterea eas ap plicui polo Magnetis Boreali, affricui etiam
              <lb/>
            polo Auſtrali, ſed ſemper cum eodem ſucceſſu: </s>
            <s xml:id="echoid-s1619" xml:space="preserve">diverſis diebus cepi
              <lb/>
            centamen, regnantibuſque variis ventis, imo intercedente intervallo
              <lb/>
            menſis, ſed nunquam alius eventus mihi contigit. </s>
            <s xml:id="echoid-s1620" xml:space="preserve">Ex noſtris igitur
              <lb/>
            tuto concludam experimentis pondus Ferri ante & </s>
            <s xml:id="echoid-s1621" xml:space="preserve">poſt affrictionem
              <lb/>
            ad Magnetem noſtrum idem manere. </s>
            <s xml:id="echoid-s1622" xml:space="preserve">Dentur igitur Effluvia Magne-
              <lb/>
            tica ex hypotheſi, hæc ſuum pondus habebunt, quemadmodum omnia
              <lb/>
            alia corpora, hactenus nota, gravitate donantur: </s>
            <s xml:id="echoid-s1623" xml:space="preserve">effluant ex Magne-
              <lb/>
            te, ingrediantur Ferrum, hujus pondus tantillum neceſſario auge-
              <lb/>
            bitur, manente Ferri eodem volumine: </s>
            <s xml:id="echoid-s1624" xml:space="preserve">ſed nec Incrementum nec
              <lb/>
            decrementum ullum ponderis obſervatur; </s>
            <s xml:id="echoid-s1625" xml:space="preserve">quo igitur jure Effluvia
              <lb/>
            corporea hic adeſſe dicentur? </s>
            <s xml:id="echoid-s1626" xml:space="preserve">Exemplum forte ex corporibus odo-
              <lb/>
            riferis petetur, quæ abſque ſenſibili ponderis jactura diu exſpirant,
              <lb/>
            ſed hæc tamen aliquod corporeum exſpirant, quod a metallis poteſt
              <lb/>
            retineri, capi & </s>
            <s xml:id="echoid-s1627" xml:space="preserve">ponderari, adeo ut ex odoribus nihil probari poſ-
              <lb/>
            ſit. </s>
            <s xml:id="echoid-s1628" xml:space="preserve">Operoſus fui in his experimentis examinandis, quia ſi in pon-
              <lb/>
            dere ferri affricti ad Magnetem differentia oritur, tum duo videntur
              <lb/>
            inde ſequi ſatis manifeſto, 1°. </s>
            <s xml:id="echoid-s1629" xml:space="preserve">Magnetem regi ab Effluviis corporeis,
              <lb/>
            caque cumFerro communicari. </s>
            <s xml:id="echoid-s1630" xml:space="preserve">2°. </s>
            <s xml:id="echoid-s1631" xml:space="preserve">Si Ferrum levius fit, Effluvia dabun-
              <lb/>
            @ur orbata gravitate, & </s>
            <s xml:id="echoid-s1632" xml:space="preserve">deſtruentia partem gravitatis ex </s>
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