Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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portio valdè expanſa, & rara erit, & ideò (ex Prop.
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105.) eius pondus, & vis compreſſiua minor erit
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pè</
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centeſima, & octuageſima pars ponderis aeris ex
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terni eiuſdem molis: igitur illa non poterit ſupra a
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quæ libellam eleuare
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pondus arginis aquei quod
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in aere aperto ab huius ingenti pondere
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ſuſpẽdeba-tur
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tur</
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: cùmque hoc ſit falſum, æquè enim argines aquei
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in prædicto vacuo ſublimantur, ac in aere aperto, igi
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tur non ab aere ibidem non exiſtente, vel rariſſimo
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argines prædicti ſuſpenduntur. </
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Cap. 8. cur
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exiguæ aquæ
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guttæ ſupra
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libellã
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aquæ
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aſcendunt.</
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Cap. 8. cur
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exiguæ aquæ
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guttæ ſupra
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aquæ
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aſcendunt.</
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parietis à qua impeditur deſcenſus, ſuſpendunturque
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particulæ aqueæ; ſed hoc minimè ſufficere videtur,
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nam ad ſummum dicta ſcabrities commoda eſſet, &
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apta ad retinendam aquam poſtquam ſemèl eleuata
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fuiſſet ad illam altitudinem, quatenùs ab aſperitati
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bus, veluti vncinis impediretur defluxus aquæ deor
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sùm, at non poſſent aquam ſubleuare, cùm ſcabrities
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vim motiuam non habeat; & ſanè aſperitates nedum
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non adiuuarent, ſed potiùs impedirent aquæ eleua
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tionem in prædictis arginibus duplici nomine, primò
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quia eædem parietis ſcabroſitates, quæ vim habent
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prohibendi deſcenſum aquæ,
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quoque eius
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aſcenſum; præterea multò magis, & maiori vi aſcen
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ſus aquæ impediri deberet quàm eius
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, quia
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in aſcenſu aqua præter reſiſtentiam aſperitatis parie
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tis ſuperare debet impedimentum, & reluctantiam
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propriæ grauitatis, cum è contra in deſcenſu ab hac
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adiuuetur. </
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