Bernoulli, Daniel
,
Hydrodynamica, sive De viribus et motibus fluidorum commentarii
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SECTIO QUINTA.
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<
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">Primam igitur ſolam accuratius ſcrutabimur: </
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<
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eorum, quæ in præcedente ſectione monita fuerunt circa contractionem venæ
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per ſimplicia orificia, aut tubos convergentes effluentis, & </
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dem, cum per tubos divergentes ejicitur. </
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<
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<
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<
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">eò uſque venam conſiderandam eſſe, donec particularum velocitates (ab-
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ſtrahendo animum à mutationibus quas gravitas in particulis extra vas producit)
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amplius non mutentur, & </
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<
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æſtimandam eſſe, quaſi ſcilicet ſuperficies venæ eouſque indureſcat. </
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<
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ceps cum de vaſe per quod aquæ effluunt ſermo erit, ſubintelligendum erit
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vas illud ideale, cujus orificium effluxus ſit ſectio venæ nulli deinceps muta-
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tioni ſubjectæ, niſi quæ deſcenſui vel aſcenſui venæ debetur.</
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jam data aquæ quantitas effluxit.</
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quivis aliam poſtulat problematis ſolutionem: </
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vas depluere ponitur & </
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<
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">ita quidem, ut eâdem præciſe affluat velocitate, quam
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habet aquæ ſuperficies, vel lateraliter affluit aqua, ſicque caret impetu, quo
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ſua ſponte aquæ ſuperficiem inſequi poſſit & </
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<
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<
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ejectæ, velocitatemque reſpondentem, iiſdem unica mutata circumſtantia ve-
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ſtigiis inſiſtendum erit, quæ in primis paragraphis ſectionis tertiæ ſecuti ſumus.</
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<
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<
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</
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<
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">quod affuſione aquarum conſtanter plenum ſervatur uſque in c d; </
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<
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tem aquæ per foramen pl; </
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<
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quæ contineri poſſit in cylindro ſuper foramine p l erecto altitudinis x, ulti-
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mam autem guttulam effluxiſſe velocitate, qua aſcendere poſſit ad altitudinem
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q s ſeu v; </
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<
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