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

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1
dientur eodem tempore ex B prædictis duabus velo­
citatibus H, & M duæ æquales moles aquæ O, & R;
ſi verò moles O fluat eodem tempore velocitate H
maiori, quam M, erit quoque aqua O maior, quàm̨
R, & ſi velocitas H minor fuerit quàm M, erit etiam
moles aquæ O minor quàm R, cùm eodem tempore
ex foramine B fluant; quia verò ſunt quatuor quanti­
tates M, N, R, S, & ſumuntur duæ aliæ quantitates H,
& O habentes quamlibet, & eamdem commenſura­

bilem proportionem conſequentibus N, & S; ſuntque
vnà æquales, vel vnà maiores, aut minores antece­
dentibus ordinatæ, igitur M ad N eamdem propor­
tionem habebit, quam R ad S.
Ex pręceden
ti prima ſup
poſitione.
Cap. 11. gra­
uia in fluido
velocitati­
bus inæqua­
libus ferri
debere.
Noſtr. Enel.
reſtitut. lib.
3. prop. 23.
PROP. CCXXI.
Ex eiſdem fistulis temporibus æqualibus fluent aquæ moles
ſubduplicatam proportionem habentes altitudinum earum.
SInt duę inæquales fiſtulæ AB maior, & CD minor
perpendicularitèr ad horizontem erectæ, eorum
foramina infima B, & D æqualia ſint inter ſe, & ſem­
per fiſtularum plenitudine perſeue­
159[Figure 159]
rante, eodem tempore T egrediatur
ex foramine B moles aquæ R, at ex
foramine D alia moles aquæ S, & ſe­
cetur altitudo EB media proportio­
nalis inter altitudines AB, & CD;
patet AB ad EB proportionem ſub­
duplicatam habere eius, quam ha­
bet AB ad CD; dico, quòd moles a­
quæ R ad molem S eodem tempore

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