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

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1
eſt, quia partes eiuſdem fluidi homogenei facillimè
excurrunt ſupra, & intra ſe ipſas, dum propter ſoli
ariditatem, quando ipſum humectare, & madeface­
re non poſſunt ob pororum incongruentiam, oportet
vt omnes ſimul inſiſtant ſuper ſilum fluidum, vel ſuper
axim perpendicularitèr plano ſubiecto inſiſtentem,
& ſic in orbem, vt priùs dictum eſt, axi connectuntur,
& globum integrum efformant magis tamen contu­
ſum, & depreſſum, quàm antea.
Cap. 8. cur
exiguæ aquæ
guttæ ſupra
libellam aquæ
aſcendunt.
Sed dices, quænam eſt vis motiua, quæ impellit
partes duarum guttularum ſe tangentium vt ſursùm
aſcendant in ſummitate guttulæ amplioris ex eis con­
poſitæ
?
Reſpondeo, quòd hoc pendet ex vi compreſ­
ſiua collateralium partium, quæ cùm non poſſint pla­
no ſubiecto vniri, & à vi glutinis ſuperatur pondus
partium eiuſdem fluidi, ſequitur vt ratione vectis
particulæ intermediæ eleuentur.
Vniuerſa hæc ope­
ratio ſic perficitur: pri­
125[Figure 125]
mò duo globi mercurij A
BCD, & EBFG innixi
pauimento VX in locis
C, & F ſe tangant latera­
liter in B. hinc patet,
quòd partes fluidę BC, &
BF facilè intra ſe ipſas excurrendo ſe mutuò ample­
cti poſſunt, & excludere aerem intermedium BCF ini­
tio facto à contactu B versùs C, & F.
Idipſum accidit
in ſupremis partibus AB, & EB, vnde efformabitur
figura quaſi ſphæroidalis, & oualis HIKL, quę poſtea

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