Casati, Paolo, Terra machinis mota : dissertationes geometricae, mechanicae physicae hydrostaticae

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1plentis (63/71) pedis cubici.
LXX
Si vas in li­
quore ponde­
retur
nunc
plenum aë­
re, nunc ple­
num liquo­
re illo, diffe­
rentia pon­
derum est
pondus li­
quoris im­
plentis capa­
citatem va­
ſis.
At manente eâdem vaſis mole intelliga­
tur aucta materia; & diminuta capacitas, ita
vt ſit vaſis pondus in aëre lib. 100 ſeſqui­
quartum prioris: erit moles cupri (10/71) pedis
cubici, & capacitas (61/71). Quarè aqua æqualis
cupro habet pondus lib. (11 19/71): igitur vas intrà
aquam plenum aquâ habet pondus lib. (88 52/71)
at plenum aëre intrà aquam amittet pondus
integri pedis cubici, & ſolùm erit lib. 20.
Horum igitur ponderum differentia (68 52/71) æ­
qualis eſt ponderi aquæ implentis capacita­
tem vaſis, quæ ex conſtitutâ hypotheſi eſt (61/71)
pedis cubici.
Similiter ſi intrà idem vas admittantur
aquæ (10/71), reliquam capacitatem (51/71) impleat
aër: moles cupri & aëris occupat in aquâ (61/71)
pedis cubici: igitur ex lib. 100 auferuntur
lib. (68 52/71), & pondus vaſis in aquâ eſt lib. (31 19/71).
At quando totum replebatur aquâ, pondus
erat lib. (88 52/71), igitur differentia lib. (57 33/71) eſt
grauitas æqualis grauitati (51/71) pedis cubici aquæ,
quæ impleret vaſis ſpatium ab aëre occupa­
tum, ſi aqua illa in aëre extra aquam ex­
penderetur.
Quemadmodum igitur ex eiuſdem vaſis

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