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

Table of handwritten notes

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            perimentum capiebam, inſtruxeram, obſervavique omnino Libram
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            a parte appenſæ virgæ leviorem eſſe redditam, imprimis poſtquam
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            aliquamdiu exſpectaveram; </s>
            <s xml:id="echoid-s1613" xml:space="preserve">unde concludebam Whiſtonum recte
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            animadvertiſſe Ferrum Magneti affrictum fieri levius, ſed neſcio quo
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            caſu diutius exſpectabam, ut accuratius differentiam ponderis nota-
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            rem, vidique tum perpetuo Libram ab eadem parte leviorem fieri;
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            </s>
            <s xml:id="echoid-s1614" xml:space="preserve">omnia hæc tum ſibi commiſi uſque in ſequentem diem, quo Libra
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            ab eadem parte non levior erat utante, ſed præponderabat, ex qui-
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            bus manifeſto apparebat hanc ponderis diverſitatem pendere ab
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            humido in fune hærente & </s>
            <s xml:id="echoid-s1615" xml:space="preserve">expulſo ab Igne, poſteroque die quo
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            ignis aberat, iterumſe inſinuante. </s>
            <s xml:id="echoid-s1616" xml:space="preserve">Unde poſtea ſemper inſtitui expe-
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            rimenta ſuſpendendo virgas ferreas ex filo æneo; </s>
            <s xml:id="echoid-s1617" xml:space="preserve">(Lances Libræ
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            ob idem incommodum diu ante a me obſervatum, ex catenis æneis
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            ſemper ſuſpenſæ quoque fuerunt) tumque nunquam aliquam ponderis
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            varietatem vidi, & </s>
            <s xml:id="echoid-s1618" xml:space="preserve">ne aliquid in hoc tentamine omitteretur, non
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            modo virgas uno ſuſpendi modo, ſed poſtea quoque inverſas iterum
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            ponderavi, præterea eas ap plicui polo Magnetis Boreali, affricui etiam
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            polo Auſtrali, ſed ſemper cum eodem ſucceſſu: </s>
            <s xml:id="echoid-s1619" xml:space="preserve">diverſis diebus cepi
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            centamen, regnantibuſque variis ventis, imo intercedente intervallo
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            menſis, ſed nunquam alius eventus mihi contigit. </s>
            <s xml:id="echoid-s1620" xml:space="preserve">Ex noſtris igitur
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            tuto concludam experimentis pondus Ferri ante & </s>
            <s xml:id="echoid-s1621" xml:space="preserve">poſt affrictionem
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            ad Magnetem noſtrum idem manere. </s>
            <s xml:id="echoid-s1622" xml:space="preserve">Dentur igitur Effluvia Magne-
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            tica ex hypotheſi, hæc ſuum pondus habebunt, quemadmodum omnia
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            alia corpora, hactenus nota, gravitate donantur: </s>
            <s xml:id="echoid-s1623" xml:space="preserve">effluant ex Magne-
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            te, ingrediantur Ferrum, hujus pondus tantillum neceſſario auge-
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            bitur, manente Ferri eodem volumine: </s>
            <s xml:id="echoid-s1624" xml:space="preserve">ſed nec Incrementum nec
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            decrementum ullum ponderis obſervatur; </s>
            <s xml:id="echoid-s1625" xml:space="preserve">quo igitur jure Effluvia
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            corporea hic adeſſe dicentur? </s>
            <s xml:id="echoid-s1626" xml:space="preserve">Exemplum forte ex corporibus odo-
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            riferis petetur, quæ abſque ſenſibili ponderis jactura diu exſpirant,
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            ſed hæc tamen aliquod corporeum exſpirant, quod a metallis poteſt
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            retineri, capi & </s>
            <s xml:id="echoid-s1627" xml:space="preserve">ponderari, adeo ut ex odoribus nihil probari poſ-
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            ſit. </s>
            <s xml:id="echoid-s1628" xml:space="preserve">Operoſus fui in his experimentis examinandis, quia ſi in pon-
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            dere ferri affricti ad Magnetem differentia oritur, tum duo videntur
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            inde ſequi ſatis manifeſto, 1°. </s>
            <s xml:id="echoid-s1629" xml:space="preserve">Magnetem regi ab Effluviis corporeis,
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            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-
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            @ur orbata gravitate, & </s>
            <s xml:id="echoid-s1632" xml:space="preserve">deſtruentia partem gravitatis ex </s>
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