Bernoulli, Daniel
,
Hydrodynamica, sive De viribus et motibus fluidorum commentarii
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HYDRODYNAMICÆ
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ſat celerem, effluxuſque valde retardatur, eoque magis, quo celerius aqua
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interna in Gyrum agitur: </
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<
s
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">quia porro nunquam omnis aqua effluit, effluxus
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tempus conſideravi, uſquedum ſtillatim effluere inciperet.</
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<
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xml:space
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">Indicat hoc experimentum minorem hic aquæ fuiſſe contractionem
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quam pro ratione √2 ad 1; </
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<
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23. </
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<
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<
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<
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">ſed eventus paullo alius fuit ut dixi, cujus rei rationem eſſe poſt-
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modum animadverti, quod labia foraminis elongata tubulum fere quamvis
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breviſſimum formarent, ut Figura oſtendit, qui venæ aqueæ contractionem
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impediebat: </
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<
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gebat.</
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">Feci ut aquæ ex vaſe ampliſſimo per tubulum effluerent horizontali-
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ter: </
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<
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">erat autem tubus breviſſimus, longitudinem nempe 3. </
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<
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habebatque in diametro fere 5. </
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<
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">Effluxit data aquæ quantitas tempore 11 {1/4} min. </
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ſet tempore 10 {2/3} min. </
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impedimenta ſtatuatur.</
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<
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">Velocitates reales aquæ non cenſui opus eſſe ut experirer, nullus du-
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bitans tales fuiſſe, quales eſſe debeant, ut obſervato tempore per obſervatum
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orificium data quantitas aquæ, nulla facta ad contractionem venæ attentione,
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efflueret.</
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<
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">Alios inſuper alîus diametri longitudinisque adhibui tubulos & </
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quantitates aquæ dato tempore datisque velocitatibus effluentis recte reſponde-
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re orficiis effluxus: </
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<
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">velocitates autem eo magis defeciſſe à velocitate integræ
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altitudini aquæ debita, quo ſtrictior & </
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erat aqua.</
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drica, altitudinem habebant 4. </
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pedis, amplitudines cylindrorum erant ad amplitudines orificiorum A, ut </
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