Fabri, Honoré
,
Dialogi physici in quibus de motu terrae disputatur
,
1665
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Auguſtin.
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<
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"> Quem porrò effectum prædicta illa gravitatio producat, non
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video; cùm nec moveri, nec extrudi poſſit. </
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Antim.
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<
s
id
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s.001120
"> Manu ipſa, ſcyphum illum ne ſurſum extrudatur immerſum reti
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nente, vim illam, impulſum illum, vel impetum, vel impreſſionem ſentimus;
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præterquam quod vis illa gravitantis aquæ comprimit aëra ſchypho con
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tentum. </
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Auguſtin.
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<
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id
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s.001122
"> Rectè; inde petitur ratio quorumdam fontium artefacto
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rum in quibus aër ab aqua compreſſus aliam aquam, cujus ſuperficiem
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premit, ſurſum extrudit; ſi quis verò non aquam, ſed Mercurium ad
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comprimendum aëra adhibeat, longè major vis preſſionis ſequetur, &
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longè altiùs aqua extrudetur; ſed jam hæc trita ſunt; vnum tantùm obſer
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vo; hallucinari ſcilicet illum, qui in magno vaſe in aquas, iuxta prædi
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ctum modum immerſo, vivere ſe poſſe credidit, & profundum maris ſcru
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tari; nempe aër in illo vaſe altè immerſo vi ſupra gravitantis aquæ ita com
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primetur, vt ducendo halitui minimè aptus eſſet: immo ipſe aër thorace
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contentus & abdomine, ita comprimeretur, vt muſculi ducendo aëri ſer
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vientes, vix ad ſuam functionem habiles reſtarent; ſed quæſo reſume alia
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capita, hoc enim tibi damus vltrò; ſcilicet corpus grave à levi deorſum non
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detrudi, ſed ſua ſponte deſcendere. </
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Antim.
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<
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id
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"> Hoc ipſum eſt, quod volo, nimirum, corpus grave tantùm ſua
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ſponte deorſum ire, & ab eo leve ſubjectum extrudi. </
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Chryſoc.
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<
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"> Licèt fatear corpus grave à levi deorſum non detrudi, ſed
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ſponte ſua deſcendere, non tamen propterea dare cogor, à gravibus deſ
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cendentibus, levia ſurſum extrudi, nam & gravia deorſum, ac levia ſurſum
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ire ſua ſponte cum Ariſtotele cenſeo. </
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Auguſtin.
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<
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"> Fingamus ſaltem, Chryſocome, corpus grave tantùm ſua
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ſponte deſcendere, præciſa qualibet alia virtute, ſeu potentia, quæ
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corpori levi inſit; quæro ex te, vtrùm aliquid diverſum ab eo, quod
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modò apparet, in deſcenſu gravium, hoc poſito, futurum ſit, nihil pror
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ſus, lapis enim v.g.per medium aëra deſcenderet, & ſurſum aëra extrude
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ret, cùm aliter deſcendere non poſſit, idemque prorſus fieret, quod modò
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fieri videmus. </
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Chryſoc.
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<
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"> Eadem ratio probat, corpus leue ea vi pollere, qua ſurſum fe
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ratur, quæ id probat, de corpore gravi; vt enim corpus grave ea pollet, vt
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feratur in locum ſuum, versùs centrum Mundi, ita & leue, vt tendat in ſuum
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ab eodem centro remotum, in hanc rem multos Ariſtotelis textus adducere
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poſſem; ſed fruſtra, cùm Philoſophi mentem tibi perſpectam eſſe non du
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bitem. </
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Auguſtin.
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<
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"> Quid quæſo corpori gravi cum Mundi centro? </
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<
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">quid ab eo
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loco commodi refert? </
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<
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">cur igitur illud adeò appetit? </
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<
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">corpus verò leve,
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quid rixæ aut diſſidij habet cum illo centro? </
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<
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">quid ab eo ſibi timet? </
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<
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">cur illud
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fugit, vt infeſtum hoſtem? </
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<
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">Præterea ſi rectè memini, Stagirita veſter lib.
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4. de Cœlo textu 39. expreſsè dicit aëra deorſum ferri, ſi aqua vel terra
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ſubtrahatur, non verò ſurſum, ſubtracto illo corpore, cui ſubeſt; & tamen
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non minùs levis eſt, quàm gravis, nec minor, vt dicis, illi virtus intrin-</
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