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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oleo illito: </
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">hoc ſpeculo alteri inuncto impoſito cum hiatu ut ante;
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<
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">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, & </
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non admodum alte; </
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<
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">Ex hiſce Experimentis liquet vim attrahentem
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vitri non impendi totam in oleum ſibi leviter inunctum, ſed per id
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tranſire, & </
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<
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">agere adhuc in Aquam, eamque elevare, licet oleum ſua vi
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repellente deprimat Aquam: </
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<
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">visigitur attrahens vitri in Aquam eſt ma-
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jor virepellente oleitenuiter inuncti; </
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<
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">quando autem oleum craſſius& </
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<
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">in
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majori copia illinitur, tum vis vitri pars major in oleum impenditur,
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pars minor in Aquam: </
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<
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xml:space
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">quia autem oleum vim repellendi Aquam habet,
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datur caſus, in quo eſt æquilibrium inter attractionem vitri in Aquam
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& </
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<
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">repulſionem olei in eandem, tumque Aqua non aſſurgit, niſi olei pars
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abſtergeatur: </
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">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.</
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menta Cl. </
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">Tranſactionibus, ſed loco A-
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quæ Mercurium, adhibendo, quæ cum profecto pulcra ſint, ad-
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denda judicavi. </
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">A B C D eſt lamella plana ſpeculi vitrei, quæ effi-
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cit unum latus capſulæ ligneæ, in qua ponitur altera lamella ſpe-
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culi, quæ contingit priorem juxta rectam A C, ſed quæ diſtat mul-
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cum a parte B D, ita ut inter hæc ſpecula relinquatur ſpatium trian-
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gulare, quod repleri poſſet à cuneo plano, acie ſc. </
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<
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ad C A, dorſo poſito in B D. </
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">Quando infundebatur Mercurius in
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capſulam uſque ad altitudinem C E, ita ut fomaret in reliqua par-
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te capſulæ ſuperficiem E F, tum intra ambas lamellas aſſurgendo
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ab inferioribus ſurſum, formabat curvam C G F. </
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">quæ invenitur eſſe
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hyperbola inſtituto examine, quando enim Cl. </
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bejo menſurabant ope circini lineam E H, & </
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tiplicatis rectangulum: </
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ad E C & </
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tur omnia rectangula inter ſe æqualia, quæ eſt natura </
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