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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rabitur procul dubio natura, eam licet obvelet circumſtantiis, in
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quibus mens illico non penetrat: </
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">anomalias hic dari certum eſt,
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quæ impediunt quominus aliquid ſtabilire audeamus, nam quomode
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idem tubus diverſæ longitudinis aquam ad eandem aliquando altitudi-
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nem attollit? </
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<
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">ejuſmodi anomaliæ monent non nimis cito proportionem eſſe aſſu-
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mendam inter altitudines Aquæ & </
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<
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cauſam impedimenti melius intellexerimus: </
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blema hactenus non ſolutum: </
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">Notare tamen in genere poſſumus,
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breviores tubos plus Aquæ, reſpectu ſuæ longitudinis habito, ele-
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vare quam longiores, tubus enim duorum pedum elevavit modo
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Aquam ad 3 {9/10} pollices, cum tubus unius pedis eam in ſe abripuit ad
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3 {5/10} pollic. </
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">atque tubus duorum pollicum Aquam ſuſtulit uſque ad
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alterum extremum.</
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confecti, qui jacuerunt aëri aperto expoſiti, aut optime ſervati fuerunt
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in thecis capſulisve; </
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">horum alterutrum extremum immittatur A-
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quæ, hæc vel nequaquam, vel tantillum adſcendere obſervabitur,
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& </
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">ſi aliquantulum introiverit, immota manebit, tubo licet in-
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verſo.</
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">Videmus igitur aërem ſuperficiei internæ horum tuborum aliquid
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illinire, quod inſtar olei vel obturaculi reſiſtit Aquæ, atque vim
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elevantem tubi tollit, aut impedit, hoc forſitan in tubo inſtar Æ-
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ruginis ſe habet, accreſcentis metallis: </
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<
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loſophi tentantes hæc Experimenta cum tubis aliquamdiu ante con-
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fectis, & </
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<
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">videntur ejuſmodi profecto decepiſſe Sinclarium, dicentem, in tubum
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ar idum vix, aut non, adſcendere Aquam. </
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<
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tum quoque Cl. </
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idem repetentem: </
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vos, brevi ante confectos, verum non in antiquos, quorum ſuper-
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ficiei Aër cruſtam induxit, ſolvendo aut ſalia, ex quibus vitrum
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conficitur, aut relinquendo aliquid terreſtre ſuæ ſubſtantiæ, </
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