Borelli, Giovanni Alfonso, De motionibus naturalibus a gravitate pendentibus, 1670

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altitudinem, ſi tota in aere conſtituta fuerit, altiùs
prædictam aquam ſuſtinebit, quàm ſi aquæ libellam
RV tetigerit, tunc enim deſcendit à K ad G, & HG
altior erit quàm DC, ſcilicèt quando fiſtula profun­
diùs mergitur, vt in B; quia nimirum dum in aere ex­
tabat, efficiebatur rete prædictum, cùm verò aquam
ſubiectam contingit, tum connexio illa tenax facilè
ſoluitur diffluitque, & ſic non ampliùs ſuſtinere tan­
tum pondus incumbens poteſt.
Cap. 8. cur
exiguæ aquæ
guttæ ſupra
libellam aquæ
aſcendunt.
Id ipſum præterea confirmatur, quia in contactu
aquæ in H ſuſpenditur circa fiſtulam externè monti­
culus quidam aqueus ſupra libellam RV, quod con­
ſequenter ſuadet aquam a vi contactus vitri externi
ſuſpendi niſu contrario eius, qui à grauitate aquæ
exercetur, & proindè aqua prædicto monticulo ſub­
iecta, & annexa leuior redditur, igitur aqua infrą
orificium ſubiectum fiſtulæ ob prædictam ſuſpenſio­
nem minùs grauis facta, neceſsè eſt, vt eleuetur ab
integro momento collateralis aquæ liberè premen­
tis, & ſic inſinuetur intra cauitatem fiſtulæ ſupra a­
quæ ſubiectæ libellam quouſque fiat momentorum
æquilibrium.
Ex hac theoria facilè reſoluuntur circumſtantiæ,
quæ in operationibus prædictarum fiſtularum obſer­
uantur, & ſimul magis confirmatur doctrina ſuperiùs
expoſita.
138[Figure 138]

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