Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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TV ſuſpenſa fuiſſent, pariterque conſtat vim exerce
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re in eorum centris grauitatum L, & Z, quæ propor
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tionaliter libras diuidunt, & ideò in maiori libra GH
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penduli longitudo IL maior erit longitudine penduli
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XZ, quare impetus deſcenſus libræ & eleuatio olei
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EF maiori velocitate fiet, quàm flexio alterius libræ
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cum oleo KY, ſcilicèt in ſubduplicata proportionę
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pendulorum; ſed quia hoc experientiæ repugnat, fa
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tendum eſt ab aliquo impedimento retardari
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aſcensũ
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olei EF, & profectò nedùm ratio habenda eſt ponde
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rum EF, FM, nec non KY, YO, quia hæc corpora in
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libra appenſa moueri non poſſunt, quin etiam motu
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tranſuerſali fluidum in fimum, ac ſupremum in fiſtulis
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contentum impellant quoque motu tranſuerſali: igi
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tur videndum quoque eſt quibus velocitatibus a
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qua tranſuerſalitèr in vtroque ſiphone impulſa mo
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ueri debeat; & primo quia ſpatium tranſuerſale AD
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ad ſpatium PS duplicatam proportionem habet eius
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quam vis motiua
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pẽduli
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IL ad vim motiuam pendu
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li XZ, ergo hoc nomine retardatur velocitas aſcenſus
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fluidi EF: præterea tranſuerſalis fluxus aquæ in ſi
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phone impeditur, quia non poteſt oleum EF aſcen
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dere vſque ad 6, 7, niſi incumbens aqua E 7 ſurſum̨
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expellatur, colloceturque in ſpatio 6 N, & hinc aqua
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expulſa reponatur in loco AN, & hinc excluſa aqua
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tuationem</
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acquirat ND & hęc in N 8
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trãsferatur
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, itaut
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omnes partes aquæ AND ſimul tempore motu ſucceſ
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ſiuo amplitudinem vaſis excurrant: huiuſmodi verò
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tranſitus fieri non poteſt abſque eo, quòd machinulæ </
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