Fabri, Honoré
,
Dialogi physici in quibus de motu terrae disputatur
,
1665
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te obſervata fuerint, quæ quia præſentis inſtituti non ſunt, à te non po
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ſtulo. </
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Antim.
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<
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id
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"> Negare non poſſum, quin multa mihi ſuppetant in hac ma
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teria, quæ tamen quia à propoſito argumento aliena ſunt, in alium lo
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cum tractanda & exponenda remitto. </
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Chryſocom.
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<
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id
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"> Vnde igitur motus levium ſurſum acceleratus? </
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<
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id
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">quòd certè
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in diverſis globulis aqua levioribus probatum eſt; immo in aëris cylindro
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per tubum aſſurgente, perſpicuè videtur; itemque in cylindro ligneo, per
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vim ad fundum latioris vaſis vel putei detento, qui ſurſum ita erumpit,
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vt longè altiùs aſcendat; etiam ſi in imo vaſis fundo foramen ſit. </
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Auguſtin.
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<
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"> Ita eſt; ii globuli motu accelerato aſcendunt, diverſo tamen
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à gravium motu; Supponimus enim liberum ſpatium in ampliſſimo vaſe
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aqua pleno, ex quo leviora corpora, per mediam aquam aſcendunt; v.g.
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cylindrus ligneus motu accelerato non quidem ſponte, ſed impreſſo ab
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aqua extrudente; nempe impetus initio productus durat deinde; quid
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mirum ergo, ſi motus inde acceleratus evadat? </
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Chryſocom.
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<
s
id
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"> Igitur ad inſtar gravium eſſet acceleratus, quod tamen
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omnibus experimentis repugnat; </
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Auguſtin.
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Æqualibus temporibus, æqualia velocitatis momenta non
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accedunt, vt fit in motu gravium, ſed minora ſemper & minora, priùs ta
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men acquiſitis ſemper remanentibus; an fortè vt in deſcenſu fune
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penduli? </
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Antim.
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<
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"> Minimè verò; cùm enim velocitates ſint vt motus, & hi in
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ſubduplicata altitudinum vt ſupra demonſtratum eſt. </
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<
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id
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">Sit ſemiparabola ABC, ſpatium
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acquiſitum motu naturaliter acce
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lerato erit AB, velocitas verò ac
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quiſita ęrit BC ; ſit etiam AB altitu
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do aquæ, intra quam corpus leve
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per vim intruditur & ex qua, præ
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valente ejuſdem aquæ pondere ſur
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ſum deinde extruditur; ſit ergo BH
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æqualis BA item IN æqualis IH
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ſitque alia ſemiparabola NKC ita
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vt CI ſit Axi parallela; erit motus
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corporis levis initio extruſionis vt
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BC emenſa verò tota aquæ altitu
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dine erit vt HN: nempe vt ab A
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ad B acquiritur velocitas BC, & in
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patio DB ſupra DE jam acquiſi
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tam in ſpatio AD, acquiritur EG ; ita in BH acquiritur IN ſupra jam
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acquiſitam BC, & vt in DB acquiritur EG ita in BL acquiritur MK
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æqualis EG ; denique vt in AD acquiritur DE ita in LH acquiritur ON.
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<
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">Sed quid de foramine in fundo vaſis aperto, cujus ſupra Chryſocomus
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meminit? </
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