Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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49
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preſſiuam, pro menſura duplæ grauitatis haberet.
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</
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<
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id
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">Verum tamen eſt, quòd alia de cauſa non eſt neceſ
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sè, vt ſemper baſes ſint æquales, neque grauitates
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ſint in eadem proportione dupla, dummodò altitu
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do AH dupla ſit altitudinis ipſius HB; & ratio huius
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diuerſitatis pendet ex alibi demonſtrandis. </
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Cap. 3. flui
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dum in ſue
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toto quie
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ſcens pon
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derat.</
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Cap. 3. flui
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dum in ſuo
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toto quie
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ſcens ponde
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rat.</
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</
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<
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id
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">Ex ſuperiori igitur ratiocinio euinci
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<
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id
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id.010.01.057.1.jpg
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xlink:href
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number
="
23
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/>
tur, falſum eſſe, quòd pronunciabatur,
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nimirùm, duplam aquam AI vt grauio
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rem, expellere deſcendendo debere ſub
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duplam aquam ſubiectam HD, cùm ècon
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tra hæc vt grauior, grauitate nempe pro
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/>
pria, & ea, quæ ei ſuperadditur ab aqua
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/>
ſuperincumbente AI in eodem loco infimo perma
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/>
nere debeat, nec vnquam à debiliori compreſſione
<
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ſuperſtantis aquæ expelli poſſit, ac proindè ſequitur
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ſumma quies, ac tranquillitas, non verò motus per
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petuus.
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Ex doctrina
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ſuperiùs tra
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dita videtur
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deduci poſ
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ſe lignum
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infra aquam
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poſitum ſur
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ſum
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re</
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non poſſe.</
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<
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id
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">Sed dices, ſi vera eſſet adducta doctrina, lignum
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deberet in fundo aquæ paritèr retineri, proptereą
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quòd nedum à propria grauitate comprimitur, ſed
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/>
etiam à pondere totius aquæ ſuperſtantis, & ideò
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/>
magis grauitaret quàm aqua ei ſuperpoſita, & proin
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/>
de lignum in fundo aquæ permanere deberet: hoc
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/>
autem falſum eſt, cùm experientia conſtet, lignum
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ſursùm ferri, nec quieſcere, antequàm ad aquæ ſu
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premam libellam perducatur. </
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