Borelli, Giovanni Alfonso - De motionibus naturalibus a gravitate pendentibus

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

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dat in eo loco vbi originem habuit. Atque ex his om-
nibus concludi poteſt aerem reuera ſuo pondere, &
vi elaſtica comprimere mercurium in fiſtula conten-
tum, eumque ad illam determinatam altitudinem ele-
uare.

Cap. 5. de ae-
ris grauitate
æquilibrio,
ſtructura, &
vi elaterią
eius.

PROP. CXVI.

Aerem eſſe grauem experimentis aliorum comprobatur, &
primam Merſennij experientiam ope ignis infide-
lem eſſe.

SEd multò magis patebit veritas prædictæ propo-
ſitionis adhibitis experimentis à quibus imme-
diatè, & directè oſtenditur aeris grauitas, & primò

conſtat experientia relata ab Ariſtotele, vbi ait, vtrem
inflatum maiorem grauitatem, & preſſionem exerce-
re quàm vacuum. hocque poſtea diligentiſſimè ab alijs
comprobatum eſt, & ſumma facilitate perfici poteſt
non quidem follibus violenter inſufflando vtrem, ſed
leni plenitudine vtre clauſo, vel commodiùs pila lu-
ſoria aerea ad trutinam examinata, & poſtea funicu-
lo circa vtrem, vel pilam reuoluto violenterque con-
ſtricto, tune quidem ob aeris condenſationem pon-
dus vtris, aut pilæ manifeſtè ad trutinam augetur;
præterea, vt docuit Galilæus, intra vitream lagenam
violentèr aer inſufflari poteſt vt valdè condenſetur,
& tunc pondus prædictæ lagenæ ſenſibilitèr augetur
promenſura aeris ibidem condenſati, & hac experien-
tia diligentiſſimè facta ingenioſiſſimus Antonius Oli-

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