Borelli, Giovanni Alfonso - De motionibus naturalibus a gravitate pendentibus

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

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1
aqua operatur, veluti in ſiphone collocata fuiſſet.

Cap. 3. flui
dum in ſuo
toto quie
ſcens pon
derat.

Cap. 3. flui
dum in ſuo
toto quie
ſcens pon
derat.

PROP. XXIV.

Aqua in ipſamet aqua demerſa undiquè comprimitur ab
ambiente aqua, & vtraque grauitatem exercet.

INtra vas ABCD aqua plenum intelligatur priſma
aqueum FGHE, ductiſque planis FL, & GM pa
rallelis horizonti. Dico, quòd aqua FH vndique pre
mitur ab ambiente aqua FILKG, & vtraque pondus
grauitatemque exercet. Quia aqua FH cum aquą
ambiente ſiphonem AKD conſtituit, in quo fluidum
ſibi homogeneum agitari poteſt, & quieſcit nihilo
minùs; ergo vna pars fluidi AK

27[Figure 27]
æquilibratur, proindequè æquè
ponderat, ac pars reliqua latera
lis IC, portio verò aquæ FH licèt
motu careat, ſitque indifferens
ad motum ſursùm, & deorsùm,
haud inferre licet eam non exer
cere vim ſuæ grauitatis vnà cum tota aqua ambi
ente, quia in ſiphonis brachio AK aquæ FH ſu
prema facies FE deorſum impelli, & comprimi de
bet ab incumbente aqua AE, pariterque infimą
illius facies GH ſursùm impelletur à ſubiecta a
qua GK non virtute propria, ſed eius quam exercet
pondus aquæ collateralis IM; porrò nedum aqua FH
impellitur ſurſum ab aqua ſubiecta BH, ſed etiam, vt
experientia conſtat, impulſionem, & conſtrictionem

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