Borelli, Giovanni Alfonso - De motionibus naturalibus a gravitate pendentibus

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

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1

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

QVia verò ratiocinium hoc à viro doctiſſimo af
fertur vt conuincens, & euidens, conabor, amo
re veritatis, luculentèr exponere eius defectum, &
claritatis gratia operationem euidentiorem in ipſą
aqua conſiderabo ſimilem omninò ei quam præ ma
nibus habemus. Sit vas profundiſſimum RTVS aere
plenum in cuius fundo pona
tur ſcutella DF mercurio ple
na, ſitque poſtea fiſtula vitrea
AC vtrinque perforata, & per
uia cuius in fima pars C demer
gatur infra mercurij libellam;
poſtea repleatur puteus aqua
vt vitri ſummitatem A non at
tingat, & remaneat fiſtula exi
nanita vt prius tunc quidem
ſenſu conſtat eleuari hydrar
gyrum in fiſtula à C vſque ad

84[Figure 84]
B quouſque mercurialis altitudo CB decima quarta
pars ſit aquæ altitudinis HG. hic iam quia effectus
eleuationis mercurij vſque ad B productus fuit ab a
qua de nouo impoſita dubitandum non eſt ab eius gra
uitate mercurium eleuatum fuiſſe, quod præterea
confirmatur ex æquipondio ipſius cylindri aquæ HG
cum mercuriali cylindro CB eiuſdem baſis; itaque in
libra CEG, vel in ſiphone tunc quieſcunt duo fluida,
mercurius nempè & aqua, cùm præcisè efficitur eorum
æquilibrium; claudatur poſtea fiſtula in B interpoſita
nimirùm laminula non diſſimili ei, quàm in arundini-

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