Bernoulli, Daniel
,
Hydrodynamica, sive De viribus et motibus fluidorum commentarii
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<
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<
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">De reactione fluidorum ex vaſis efflluentium eo-
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rundemque, poſtquam effluxerunt, impetu in
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plana quibus occurrunt.</
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<
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<
s
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">AQuæ dum ex vaſe ejiciuntur ſimili agunt modo in vas, ex quo effluunt,
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quo globus in tormentum bellicum aut ſclopetum, ex quo explodi-
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tur: </
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<
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<
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">& </
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<
s
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">id quidem jam annotavit Newtonus
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in princ. </
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<
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<
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<
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<
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">recteque inde deducit aſ-
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cenſum pilarum, quæ pulvere pyrio, carbone temperato implentur; </
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<
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enim inflammata, dum per foramen paullatim expirat, pilas in altum projicit.</
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</
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<
s
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">Sed nec ſatis generaliter pro rei momento argumentum pertractavit ci-
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tatus auctor (cum id ex ipſius inſtituto non erat) nec veram rei menſuram de-
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dit. </
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<
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">Imo in duabus editionibus poſterioribus id prorſus ſilentio præteriit: </
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<
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tavit autem vim illam repulſionis eſſe æqualem ponderi cylindri aquei, cujusbaſis
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ſit orificium aquas tranſmittens & </
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<
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ciei aqueæ ſupra foramen. </
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<
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">Recte quidem hæc menſura deducitur ex opinio-
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ne, quam tunc temporis fovebat Newtonus, circa velocitatem aquæ ex vaſe
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effluentis, dum ſtatueret aquam ad dimidiam ſuperficiei altitudinem ſua velo-
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citate aſcendere poſſe.</
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<
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">Prouti autem hujus propoſitionis falſitas nemini amplius nunc ignota
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eſt, ita & </
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<
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">alterius defectum inde quivis facile colliget, quamvis prima fronte
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ſatis veriſimilis.</
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<
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<
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aquas ex vaſe infinitæ amplitudinis horizontaliter effluere ponemus. </
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<
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autem demonſtratum repulſionis vim non ſtatim à fluxus initio totam adeſſe,
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niſi quatenus & </
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<
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