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

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1
AF, & poſito quod prædicta mercurij ſublimatio de­
pendeat à compreſſione, quam cylindrus aereus SD
vſque ad ſupremam aeris ſuperficiem extenſus ſuą
grauitate efficiat ſupra ſtagnantem mer­
91[Figure 91]
curium D, ſequitur, quod ſi occludatur
orificium G eiuſdem fiſtulæ remanebit
portio aerea intercepta GD eodem mo­
do compreſſa reſtrictaque vt priùs, quia
nimirùm digitus, vel operculum reti­
net conſeruatque aerem in eadem po­
ſitione, & conſtrictione, quam prius ab
incumbente aere patiebatur.
Eodem̨
ferè modo, ac ſi loco aeris ſuperpone­
rentur mercurio plures cylindri lapidei
vnus ſuper alterum incumbens, tunc
profectò infimus cylindrus comprime­
ret ſuperficiem ſubiecti hydrargyri D
non tantùm energia ponderis proprij,
ſed vi conflata ex grauitate omnium incumbentium
cylindrorum modò ablatis ſemotiſque ſupremis om­
nibus columnis ſi in fimus cylindrulus, tantummodò
tabula, vecte, aut quo cumque alio retinaculo eadem
vi fixè in eodem ſitu retineretur, patet quòd æquali
energia comprimeret ſubiectam mercurij ſuperficiem
D ac priùs premebatur à prælonga illa ſerie colum­
narum incumbentium; Et hic dicendum eſſet, quòd
cauſa immediata impellens mercurium non eſt longa
illa ſeries columnarum SD, ſed eſt infimus cylindru­
lus GD qui tanta vi comprimit ſubiectum mercurium

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