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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DE TUBIS CAPILLARIBUS VITREIS.
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Mercurio in vaſculo, unde ſtatim ad mutuum Mercurii contactum,
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ſecundum leges gravitatis, deſcendit ex Tubo omnis, imo depreſſior
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ad oram B eſt, quam ſecundum leges Hydroſtaticas deberet: </
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dicio manifeſto, Mercurium plus agere in Mercurium, quam vi-
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trum in eundem agit. </
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deſcriptum in L’Hiſt. </
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phonem inæqualium crurum A B C D. </
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A B immiſit Mercurium uſque ad F F, cujus ſuperficies ſtetit con-
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vexa, & </
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">Mercurius ingreſſus fuit tubum graciliorem uſque ad
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Ctantum, quodeſt infra ſuperſiciem F F, erat hæc quoque ſuperficies
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convexa: </
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">Effuſo Mercurio, crura ſiphonis obduxit interne cerâ lique-
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factâ, vel ſebo; </
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">& </
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<
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">iterum infudit Mercurium in A B uſque ad FF,
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adſcendit tum Mercurius in Tubum graciliorem uſque ad K, ſupra
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libellam F, F, habuitque ſuperficiem concavam.</
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<
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">Vis, quæ in graciliore crure deprimebat Mercurium vel ipſi re-
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ſiſtebat, ſublata aut impedita fuit a ſebo illiniente parietes, verum
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vis Tubi elevans agit in Sebum, nam id, cum liqueſactum eſt, ele-
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vatur quemadmodum Aqua; </
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">idcirco hæc interna Tubi vis ad ſilen-
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tium deducitur reſpectu Mercurii & </
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tur enim nunc Mercurius in Tubum illinitum C D, quatenus elevatur
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ab ipſo ſebo vel cerâ.</
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<
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">Dein immiſſus fuit cruri ampliori A B, Tubus E E ejuſdem dia-
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metri cum C D, quem ingreſſus fuit Mercurius ad altitudinem I, ean-
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dem cum C in tubo C D.</
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erit. </
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ca eſt amplior, altera anguſtior, breviſque: </
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liori Aquæ, adſcenſus fiet ad altitudinem æqualem longitudini A P,
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ſi vero pars amplior C. </
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B F: </
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Aquæ ſuperficiem A B in vaſculo, manebit Aqua in Tubo ſuſpenſa.</
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