Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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fluidum diuidi poſſe in infinitum in partes ſemper
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fluidas; qua propter neceſsè eſt, vt tandem diuiden
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do perueniamus ad particulas aquę, quę non ampliùs
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fluidæ ſint, ſcilicèt in quibus non vale at moueri vną
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eius minima particula quieſcentibus collateralibus,
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proindeque illæ poſtremæ fluidi particulæ erunt
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ſiſtentes</
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, quod erat oſtendendum. </
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Cap. 7. dę
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natura flui
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ditatis.</
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Cap. 7. dę
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natura flui
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ditatis.</
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per vitri poroſitates, patet ex eo, quòd videmus præ
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longam trabem ſuper aquam ſtagnantem
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poſitã
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<
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trãſ-uersè
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uersè</
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trahi poſſe à vi exigui capilli, igitur illa exigua
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vis motiua ſuperare poreſt reſiſtentiam tot partium̨
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aquæ quot aſſignari poſſunt in prædicta amplitudine
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trabis. </
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">Vnde conijcitur, quòd vis, quæ requiritur ad
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impellendam paruam, & acutam feſtucam natantem
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debeat eſſe ferè inſenſibilis ob eius maximam minu
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tiem, & tamen à tam minima vi mouetur vna aquæ
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particula non motis collateralibus, & proptereà vis
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huic æqualis ſufficiens eſt ſu perare tenacitatem, qua
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aquæ particulæ colligantur, vniunturque, erit igitur
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energia tenacitatis partium aquæ minimi, & exigui
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roboris, & propterea ſuperari poterit à puſilla vi im
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pulſiua. </
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ſincera, & abſque mixtura partium terreſtrium, & ſo
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lidarum, nam licèt hoc verum ſit, nihilominùs negari
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non poſſunt partes puræ aquæ, quæ inter minutiſſima
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fragmenta terreſtria intercedunt, & ex ſui natura
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ſint fluidę, poſſent quidem penetrare interſtitia inter </
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