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

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1
talis vis motiua in eodem corpore homogeneo aquæ
non ſemper eiuſdem gradus, niſi cùm partes exter­
næ à centro terræ æquè recedunt.
Cap. 8. cur
exiguæ aquæ
guttæ ſupra
libellam aquæ
aſcendunt.
Sit ergo punctum E centrum globi terraquei, &
ſupponamus aquam ABCD inæqualitèr diſtare à cen­
tro
E, ſcilicèt à vi externa, v. g. ſit eleuatus mons a­
queus MAK ſupra reliquam eius ſuperficiem ſphæri­
cam BCD. & ſiquidem vis
118[Figure 118]
motiua deorsùm | impellens
versùs centrum E eſſet eiuſ­
dem
energiæ in aqua A, atque
in B, non poſſet deprimi ſu­
prema aqua A deorsùm, ex­
pellendo, & ſuperando reſi­
ſtentiam
aquæ B, vel D, quia
nimirùm potentia æqualis in
æqualem minimè agere poteſt.
Neceſsè ergò eſt vt aqua
eleuata MAK maiorem vim compreſſiuam habeat, quam
aqua B: eſtque hoc euidentiſſimum, quia moles aquæ
EA, quæ altior, copioſior, & ideò grauior eſt, ſupera­
bit reſiſtentiam minùs eleuatæ aquæ EB, & minoris
molis; Igitur vera cauſa, quare elementum aquæ cir­
ca centrum terræ ſphæricè contornatur, eſt, quia par­
tes aquæ cum reliquis continuatæ magis à centro
terræ eleuatæ, maiorem vim compreſſiuam habent,
quàm alię partes minùs à prædicto centro recedentes.
119[Figure 119]

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