Fabri, Honoré
,
Dialogi physici in quibus de motu terrae disputatur
,
1665
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mente diſco elevatus in fiſtulæ latera gravitet, quàm Mercurius, & aper
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to in extante fiſtulæ ſegmento foramine, tam vnus effluat, quàm alius;
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& vt dicam ſuper hoc, quod ſupra exciderat, quonam pacto Mercurius
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extans in ſegmento fiſtulæ IC gravitet in latera ejuſdem, facto foramini
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in L, totum pondus Mercurij CL exerit vim ſuam, qua extrudit Mercu
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rium ſubjectum per foramen L: itaque omnes partes Mercurij gravi
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tant in B vltimam ſuperficiem fiſtulæ; hæc autem ſuſtinetur, vt volunt
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à cylindro exterioris aëris; ex hac porrò gravitatione quaſi repercuſſa
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ſeu reflexa ſequitur, vt illius niſu, ſi pars ſubjecta versùs latera cedere
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poſſit, versùs illa extrudatur; hinc aperto foramine, tanta vi erumpit;
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igitur niſus ille non pellit fiſtulam, vel illius latera deorſum, ſed
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quoquo versùm per horizontalem diſtrahit, in quo, meo judicio, nul
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la eſt difficultas; ſaltem apud eum; qui rem iſtam paulò attentiùs per
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pendat. </
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Chryſocom.
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Hæc ratio ad primam facilè refertur, qua ſcilicet probaſti,
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Antime, ex eo quod fiſtula cum extante Mercurio appenſa totam vim ſui
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ponderis exerat, evinci, ſegmentum extantis Mercurij à cylindro exte
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rioris medij, ſcilicet aëris, minimè ſuſtineri. </
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Antim.
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"> Reducitur, non inficior; cùm tamen novum ſit experimentum,
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illudque ſatis luculentum, novæ rationis mihi loco eſt. </
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Auguſtin.
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"> Quid ſi non aëris, ſed aquæ ſegmentum in fiſtulam immitta
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tur, antequam Mercurius deſcendat in CI? </
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Antim.
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<
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id
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"> Hoc alij jam probarunt, inveneruntque, Mercurium ſubſidere
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infra C (1/14) altitudinis ſegmenti aquæ immiſſæ, quia pondus cylindri aquej
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14. pedum v. g. eſt æquale ponderi cylindri Mercurij vnum pedem alti;
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at verò ſi aëra, non aquam immiſeris, Mercurius ſubſidit infra C, ſpatio
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majore ipſo ſegmento aëris immiſſi, ita illi, ſed pace illorum dixerim;
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ſit enim fiſtula BD 4 pedum; immittatur ſegmentum aëris altum vnum
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pedem, tum Mercurius, fiatque more ſolito, non ſubſidit Mercurius in
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fra C ſegmento vnius pedis, ne dum majore ; itaque ſi ſegmentum aëris
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immiſſi ſit paulo minus, non nego fieri poſſe, vt ſegmentum deſcenſus
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Mercurij infra C ſit majus ſegmento aëris immiſſi, quod tamen genera
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tim dici nequit ; ſed hæc ſupra jam diſcuſſimus. </
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<
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">Venio ad quintam ratio
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nem. </
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">Segmentum fiſtulæ CD non eſt vacuum, ſed plenum alia materia,
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eaque valde tenſa, tenſo aëri haud abſimilis, qui exhauſto per anthliam
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multo aëre, in recipiente, de quo ſupra reſtat. </
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Chryſocom.
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<
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"> Equidem jam ſupra probaſti, ad evidentiam, meo ſaltem ju
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dicio, ſegmentum CD vacuum non eſſe; ſed aliqua tenui materia plenum;
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hoc facilè conceſſerim, tenſam tamen eſſe nondum à te, quod ſaltem
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à me perceptum ſit; huc vſque probatum. </
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Antim.
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<
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"> Deducere facilè poteras, ex adducto experimento veſicæ cy
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prinæ, quæ poſt deſcenſum Mercurij adeò intumeſcit; rejecimus enim re
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ſponſionem vel hypotheſim ſupra laudati Autoris, quod ſcilicet aër in pli
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cis incluſus, compreſſus priùs, ſuæ deinde libertati relictus, ſeſe explicet,
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infletque veſicam; nam & tanta compreſſio aëris repugnat ſenſui, cùm </
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