Borelli, Giovanni Alfonso - De motionibus naturalibus a gravitate pendentibus

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

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1
dente infrà ſupremam hy

81[Figure 81]
drargyri libellam DE, tunc
ſublato digito mercurius
profluet ab orificio C quo
uſque altitudo FB extantis
hydrargyri ſupra libellam̨
DE ſit pedum duorum, &
quadrantis, vel vnius cubi
ti, & quadrantis, nec vlte
rius hydrargyrum grauiſſi
mum deſcendit ſemperque
ad eamdem altitudinem̨
perſeuerat, licèt inclinetur
fiſtula, ſcilicèt ducta recta FG parallela horizonti sen
per ſummitas hydrargyri ad eamdem horizontalem
FG perueniet quomodocumque fiſtula inclinetur.
Ipſe Torricellius experimenti inuentor ſagaciſſimè
cauſam quoque huius effectus indagauit, animaduer
tit enim nos in infima profunditate oceani aerei de
merſos eſſe, & ſicuti maris aqua vndique fundum̨
comprimit per lineas horizonti perpendiculares, ſeù
directas verſus centrum telluris, ſic quoque in oceano
aereo niſus eius grauitatis exercetur perpendiculari
tèr ſupra horizontis planum, vnde concipi debent cy
lindri aerei perpendicularitèr ſuperficiem hydrargy
ri DE ſupremam comprimentes; quia verò eadem̨
libella mercurij DE comprimitur quoque in ſitu B à
ſuperficie baſis B mercurialis cylindri FB efforma
tur veluti libra, vel ſipho, quæ numquam quieſcit, ni-

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