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

Cap. 3. flui
dum in ſuo
toto quie
ſcens ponde
rat.

PROP. XIV.

Id ipſum in ſiphone comprobatur.

PRæterea vſurpetur idipſum vas vitreum, ſed in
flexum, vt eſt AMOP ſiphonis inuerſi figuram
referens, atque portio ANO aquą

18[Figure 18]
impleatur, reliqua verò fiſtula OP o
leo. Et quia vt mox oſtenſum eſt ex
aduerſarij hypotheſi tota aqua AM
vim non infert neque impellit infe
riorem aqueam laminam MN, cùm̨
nullam grauitatem ſuper eam exer
ceat; igitur tota moles aquea AM nil prorsùs impel
let terminum aquæ O & proindè ab hoc non impelle
tur ſurſum oleoſus cylinder OP, igitur oleum OP
nulla ratione ſubleuari ſursùm deberet, ſed hoc eſt
falſum, igitur falſa eſt quoque hypotheſis aſſumpta,
quòd aqua in ipſamet aqua poſita grauitatem noņ
exerceat.

Et profectò methodus ac criterium dignoſcendi,
an corpus aliquod grauitet, atque impellat alterum,
erit huiuſmodi; conſiderari nimirum debent effectus
ab eo producti, & quanta vis contraria requiritur,
vt vnum à conſortio, & contactu alterius diuellatur,
& ſeparetur, & quia ſi nauis natando lateraliter ſco
pulum contingeret, poſſet à quacumque exigua vi tra
hi, diuelli, & ſeparari ab eodem ſcopulo, hinc in re
optimo inferemus nauim omninò carere vi motiua, &

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