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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bo ita inclinato ad horizontem, ut alterum extremum modo ha-
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beat perpendicularem altitudinem 20 linearum ſupra ſuperficiem
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Aquæ in vaſculo, totus tubus implebitur, uti etiam experientiâ
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comprobatur.</
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">Si idem tubus continens 20 lineas Aquæ inſe, ex vaſe ſublatus lente
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inclinetur, ut parallelus horizonti evadat; </
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<
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">tum aqua in tubo mo-
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vebitur ab uno extremo verſus aliud, ita tamen, ut occupet accu-
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rate mediam tubi partem, relinquatque ambas extremitates vacuas
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Aquâ, & </
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<
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<
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<
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xml:space
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">Extremum hujus tubi, quod Aquæ immerſum fuit, altius eleve-
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tur ſupra horizontem, infra quem deprimatur alterum extremum,
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tum Aqua deſcendit verſus humilius extremum, motu concitato;
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</
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<
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">ſubito tamen ſiſtitur ante tubi orificium ad diſtantiam {1/3} lineæ ab o-
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ra, quæ tubi pars aëre impleta inſtar obturaculi ſe habet: </
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<
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bo elevato perpendiculariter, adeoque penitus inverſo, Aqua deſcen-
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dit uſque ad ultimam oram, manetque in tubo ſuſpenſa ad eandem
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altitudinem: </
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">Hic tubus nunc omnino interne humectatus, iterum Aquæ im-
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poſitus, perpendiculariter, eodem extremo fluidum attingente, ſi-
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ve oppoſito, non rapuit Aquam ad majorem altitudinem quam 20 li-
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nearum in ſe.</
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differentia altitudinis in ſe recipit: </
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">Ex hoc Experimento detegimus
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errorem Boylei, memorantis Aquam melius adſcendere in tubos
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prius humidos, quam in ſiccos; </
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mius, cum in Colleg. </
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humectatus prius, altius admittebat aquam, per cavitatem </
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