Bernoulli, Daniel
,
Hydrodynamica, sive De viribus et motibus fluidorum commentarii
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SECTIO DUODECIMA.
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<
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xml:space
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<
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">ex cujus fundi medio deſcendit tubus
<
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D E formam habens coni truncati inferiora verſus divergentis: </
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<
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perpetuo aquæ in A G, ita ut ſic vas plenum conſervetur.</
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<
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<
s
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xml:space
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">Sit autem altitudo ſuperficiei aqueæ ſupra orificium E = a, & </
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<
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xml:space
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">ſupra D
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(qui locus eſt pro quo preſſio aquæ quæritur) = c: </
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<
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xml:space
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">amplitudo orificii in E = m;
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</
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<
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">& </
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<
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">amplitudo ſeu ſectio horizontalis in D = n. </
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<
s
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xml:space
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">Erit preſſio aquæ in D =
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c - {mm/nn} a, quæ quantitas vi hypotheſium eſt negativa, ſic ut latera canalis
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introrſum premantur à columna aquea altitudinis {mm/nn} a - c.</
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<
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<
s
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">Igitur ſi concipiatur tubus incurvus D L N alteri D E inſertus, erit aqua
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præterfluens in D in æquilibrio cum aqua D L N, quando altitudo D ſupra N
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eſt = {mm/nn} a - c. </
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<
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">Si altitudo hæc minor eſt, ſua ſponte aqua aſcendet nec aſ-
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cendere deſinet, quamdiu aquis orificium N ſubmerſum eſt, ita ut ſic aquæ
<
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ex loco humiliori in ſublimiorem ſine ulla vi externa elevari poſſint, ſi in A G
<
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aquæ ſufficiente copia affluant. </
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<
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jor eſt quam {mm/nn} a - c, aſcendet aqua in crure L N, donec illi fuerit æqualis.</
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<
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andum eſt, quod paſſim monui ex-
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perientiam docere, nempe multum abeſſe quominus aquæ per tubos à vaſe,
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cui implantati ſunt, divergentes tota ſua velocitate, quam vi theoriæ obtinere
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deberent, effluant; </
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<
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<
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expoſita eſſe deberet: </
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<
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xml:space
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">Error corrigetur ſi loco {mm/nn} a ponatur altitudo velo-
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citatis, quam aqua in D habet; </
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<
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">quæ altitudo per experimentum de quantitate
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aquæ dato tempore effluentis ſumtum obtinetur.</
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<
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<
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in Fig. </
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<
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<
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