Borelli, Giovanni Alfonso - De motionibus naturalibus a gravitate pendentibus

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

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1
premam partem ipſius pilæ, quod eſt ſignum euidens
nullam vim compreſſiuam pati ab aere ſuperincum
bente.

Cap. 4. poſi
tiuam leui
tatem noņ
dari.

PROP. LXXVI.

Si oleum, vel aer aſcenderet in aqua ſponte à vi ſuæ leui
tatis impulſus non poſſet eius baſis excauari ad inſtar
ſcutellæ.

TAndem demonſtrandum eſt po

58[Figure 58]
ſito, quòd aer, vel oleum ABCH
aſcenderet in ipſa aqua à propria, &
intrinſeca virtute leuitatis impulſum,
quod eſſet abſolutè impoſſibile, vt e
ius baſis infima excauata eſſet ad mo
dum ſcutellæ; quia ex aduerſarij hypo
theſi oleum ABCH aſcendit in aqua contenta in fi
ſtula ſtricta RSVX propria virtute leuitatis ab I ver
sùs E, nec ab aqua infima impellitur exprimiturque
ſursùm, ergò aqua MACK, quæ currit ad replendum
ſpatium derelictum ab oleo cum ſit ex ſui natura gra
uis exercet vim ſui ponderis ab H verſus I premen
do præcisè ſuper fundum vitri RX, & nullo pacto vim
exercere poteſt ſursùm ab l versùs H, hoc enim eſſet
contra grauium naturam, & contra ipſam aduerſarij
hypotheſim. Præterea quia oleum ABCH, & aqua
ambiens motibus contrarijs agitari debent, nempè
oleum, vt leue, aſcendet dum aqua ambiens deſcen
det, igitur non ſibi occurrunt, & aduerſantur, ſed ab

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