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-s8501" xml:space="preserve">
              <pb o="346" file="0360" n="360" rhead="DISSERTATIO"/>
            oleo illito: </s>
            <s xml:id="echoid-s8502" xml:space="preserve">hoc ſpeculo alteri inuncto impoſito cum hiatu ut ante;
              <lb/>
            </s>
            <s xml:id="echoid-s8503" xml:space="preserve">in initio non adſcendit inter eorum commiſſuram Aqua, cui im-
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            ponebantur, ſed aliquo elapſo tempore, avellebatur fuligo, ſur-
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            ſum ab Aqua propellebatur, quæ adſcendit, ſedinæquali formâ, & </s>
            <s xml:id="echoid-s8504" xml:space="preserve">
              <lb/>
            non admodum alte; </s>
            <s xml:id="echoid-s8505" xml:space="preserve">Ex hiſce Experimentis liquet vim attrahentem
              <lb/>
            vitri non impendi totam in oleum ſibi leviter inunctum, ſed per id
              <lb/>
            tranſire, & </s>
            <s xml:id="echoid-s8506" xml:space="preserve">agere adhuc in Aquam, eamque elevare, licet oleum ſua vi
              <lb/>
            repellente deprimat Aquam: </s>
            <s xml:id="echoid-s8507" xml:space="preserve">visigitur attrahens vitri in Aquam eſt ma-
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            jor virepellente oleitenuiter inuncti; </s>
            <s xml:id="echoid-s8508" xml:space="preserve">quando autem oleum craſſius& </s>
            <s xml:id="echoid-s8509" xml:space="preserve">in
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            majori copia illinitur, tum vis vitri pars major in oleum impenditur,
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            pars minor in Aquam: </s>
            <s xml:id="echoid-s8510" xml:space="preserve">quia autem oleum vim repellendi Aquam habet,
              <lb/>
            datur caſus, in quo eſt æquilibrium inter attractionem vitri in Aquam
              <lb/>
            & </s>
            <s xml:id="echoid-s8511" xml:space="preserve">repulſionem olei in eandem, tumque Aqua non aſſurgit, niſi olei pars
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            abſtergeatur: </s>
            <s xml:id="echoid-s8512" xml:space="preserve">ſi oleum aut ſebum craſſius adhuc illiniatur vitro, Aqua
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            non modo non aſſurgit, ſed repulſa humilior manet, atque infra
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            libellam depreſla.</s>
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          <head xml:id="echoid-head264" xml:space="preserve">EXPERIMENTUM VII.</head>
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            <s xml:id="echoid-s8514" xml:space="preserve">Tab. </s>
            <s xml:id="echoid-s8515" xml:space="preserve">13. </s>
            <s xml:id="echoid-s8516" xml:space="preserve">fig. </s>
            <s xml:id="echoid-s8517" xml:space="preserve">15. </s>
            <s xml:id="echoid-s8518" xml:space="preserve">Cum iiſdem ſpeculis inſtituit quoque Experi-
              <lb/>
            menta Cl. </s>
            <s xml:id="echoid-s8519" xml:space="preserve">Jurinus, quæ inſeruit Philoſ. </s>
            <s xml:id="echoid-s8520" xml:space="preserve">Tranſactionibus, ſed loco A-
              <lb/>
            quæ Mercurium, adhibendo, quæ cum profecto pulcra ſint, ad-
              <lb/>
            denda judicavi. </s>
            <s xml:id="echoid-s8521" xml:space="preserve">A B C D eſt lamella plana ſpeculi vitrei, quæ effi-
              <lb/>
            cit unum latus capſulæ ligneæ, in qua ponitur altera lamella ſpe-
              <lb/>
            culi, quæ contingit priorem juxta rectam A C, ſed quæ diſtat mul-
              <lb/>
            cum a parte B D, ita ut inter hæc ſpecula relinquatur ſpatium trian-
              <lb/>
            gulare, quod repleri poſſet à cuneo plano, acie ſc. </s>
            <s xml:id="echoid-s8522" xml:space="preserve">intrante uſque
              <lb/>
            ad C A, dorſo poſito in B D. </s>
            <s xml:id="echoid-s8523" xml:space="preserve">Quando infundebatur Mercurius in
              <lb/>
            capſulam uſque ad altitudinem C E, ita ut fomaret in reliqua par-
              <lb/>
            te capſulæ ſuperficiem E F, tum intra ambas lamellas aſſurgendo
              <lb/>
            ab inferioribus ſurſum, formabat curvam C G F. </s>
            <s xml:id="echoid-s8524" xml:space="preserve">quæ invenitur eſſe
              <lb/>
            hyperbola inſtituto examine, quando enim Cl. </s>
            <s xml:id="echoid-s8525" xml:space="preserve">Jurinus cum Hauks-
              <lb/>
            bejo menſurabant ope circini lineam E H, & </s>
            <s xml:id="echoid-s8526" xml:space="preserve">H G, oritur ex his mul-
              <lb/>
            tiplicatis rectangulum: </s>
            <s xml:id="echoid-s8527" xml:space="preserve">menſurando autem alias lineas parallelas
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            ad E C & </s>
            <s xml:id="echoid-s8528" xml:space="preserve">illas multiplicando per diſtantiam à puncto E, invenieban-
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            tur omnia rectangula inter ſe æqualia, quæ eſt natura </s>
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