Fabri, Honoré
,
Dialogi physici in quibus de motu terrae disputatur
,
1665
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quamdiu ſurſum deorſumque libratur: Cogita pondus funependulum
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ex chorda tenſa vel arcu. </
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<
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">Nonò, Cur ſi tantulum aëris in fiſtula relinqua
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tur, Mercurius poſt deſcenſum ſubſidat infra C: quia illud tantulum
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aëris tum à Mercurio, tum à materia tenſa dilatatur, vnde majus ſpa
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tium occupet neceſſe eſt; ac proinde, vt ſpatium CD explicatur, ita
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CI contrahitur; ſecus accidit intruſa aqua, loco aëris; quia aqua, vt
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ad compreſſionem, ita ad tenſionem inepta eſt. </
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<
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id
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s.002443
">Decimò, Cur admoto
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preſſè digito ori B, & librata huc illuc fiſtula, illa materia tam cito tran
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ſeat ab extremo ad extremum: nam propter tenſionem, non modò ci
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tiſſimè adducitur, verùm etiam facilè contrahitur, inter fiſtulam &
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Mercurium. </
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<
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id
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">Cuncta hæc & alia quamplurima, quæ facilè ſuggeres, in
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hac tua hypotheſi explicare poſſem; ſed vnde quæſo iſta materia? </
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quo tandem illa, cùm inclinata fiſtula aſſurgit Mercurius, & totam
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implet? </
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Antim.
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<
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id
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"> Vel inde tibi maximoperè obſtrictus ſum, quod ab onere illa
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explicandi me liberum eſſe volueris; quæ obiter quidem, clariſſimè ta
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men ſub vnum eundemque adſpectum adduxiſti; reliqua ſi quæ ſuper
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ſunt, perſtringam; ſed ante omnia, declarandum mihi eſt, vnde or
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tum ducat, & quò tandem abeat illa materia tenſa. </
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<
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id
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s.002448
">Et verò quemad
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modum alij, vt naturales effectus explicent, eorumque indagent cau
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ſas, multa fingunt, quæ ſenſibus minimè ſubjiciuntur, vt ſpiras aëris,
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arcus, ramos, æthera, ſubtilem materiam, cochleas magneticas, bul
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las, ſphærulas, ramenta, & motus diverſi generis; licèt nihil horum
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videant, aut ſentiant, ſed gratis fortè ſtatuant, ad effectus ſenſibiles
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explicandos, quos ex communibus principiis explicari non poſſe ſibi
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perſuaſerunt; quidni & mihi aliquid ſimile fingere liceat, vel vt ve
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riùs dicam ſtatuere & ex communibus principiis deducere? </
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<
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id
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">Lico igi
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tur, vt rem paulò altiùs repetam, elementa noſtra pura non eſſe, ſed
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omnino mixta, vt omnes mihi facilè concedent; etiam ipſam aquam,
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quam bibimus, ipſum aëra quem haurimus; & cùm omne mixtum ex
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miſcibilibus conſtet, haud dubiè quælibet mixti pars longè major eſt
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parte miſcibilis, totum ſcilicet ſua parte majus; hinc aër per poros
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corporum etiam laxiores non ſubit, multò minùs aqua; immo aliqua
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corpuſcula aquis ſtygiis inſunt, quæ ſubtilis humoris vehicula in du
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riſſimorum etiam corporum poros ſubeunt, eorumque ſolvunt plexum;
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hæc porrò mixta eſſe, nemo inficias eat; igitur longè minores ſunt par
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tes miſcibilium, ex quibus illa conſtant. </
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<
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">Cùm autem ad multum natu
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ræ vſum, tenuis quædam materia, quæ ad purum aëris elementum lon
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gè propiùs accedit, quàm aër, qui nos ambit, neceſſaria eſſet, illam
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haud dubiè omiſſam fuiſſe, ac deſiderari nemo dixerit; & vt ſunt præ
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cipui tres corporum ſtatus, duri ſcilicet, ſeu concreti, liquidi & ſpira
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bilis, nec non innumeræ ſub quolibet genere ſpecies; nihil obſtat, quin
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aliquæ ſint corporis ſpirabilis ſpecies, quæ longè majorem tenuitatem
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præ ſe ferant. </
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Chryſocom.
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<
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"> Non video, quem vſum neceſſarium huic ſubtili ma-</
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