Bernoulli, Daniel
,
Hydrodynamica, sive De viribus et motibus fluidorum commentarii
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SECTIO SECUNDA.
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tubus fuerit plumbeus, ſuſtinebit aquam ad altitudinem 18. </
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<
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<
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<
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rius obſervationis, poteritque altitudinem aquæ ferre 99. </
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<
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xml:space
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">ſi latera tubi
<
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habeant in craſſitie lineam integram. </
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<
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xml:space
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">Convenit hoc cum eo quod Mariot-
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tus in tract. </
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<
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xml:space
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<
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<
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">habet, ubi nempe dicit tubum plum-
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beum, cujus diameter unius erat pedis, & </
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<
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xml:space
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">laterum craſſities duarum li-
<
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nearum cum dimidia ſine ruptura aquam tuliſſe ad altitudinem centum pe-
<
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/>
dum, quod cum obſervaret abraſit ſenſim latera, donec tandem ad lineæ
<
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craſſitiem eſſent diminuta, & </
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<
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">tum denique vim aquæ tubum disrupiſſe.</
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">Ex obſervata fili ænei firmitate colligitur etiam firmitas tormentorum
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bellicorum: </
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<
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">tormentum bellicum cujus animæ diameter habeat
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tres poll. </
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<
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xml:space
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">ſolent autem haud procul à lumine accenſorio, ubi maxima eſt
<
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vis pulveris, craſſities laterum eſſe præterpropter æquales diametro ani-
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mæ, ita ut diameter tota ſit tripla diametri animæ. </
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<
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">Quia igitur craſſities
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hæc non eſt negligenda præ diametro animæ, cenſebimus materiam omnem
<
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concentratam in medio atque ſic ab axe animæ diſtantem tribus pollicibus.
<
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</
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<
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">Hoc poſito erit altitudo maxima aquæ quam tormentum haud procul à lu-
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mine accenſorio ferre poteſt = {11/2} x 12 x 3 x 2 x 518 = 205128, quæ vis
<
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fere ſepties millies ſuperat elaſticitatem aëris naturalis. </
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<
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xml:space
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">Oſtendam autem
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in ſequentibus, pulverem pyrium accenſum vim exercere poſſ
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@ ad rum-
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pendum tormentum aliquantum quidem majorem, quam quæ dicta fuit,
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ſed non multum tamen excedentem. </
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">Reliquum autem firmitatis, quod re-
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quirunt tormenta, habent à cingulis ſeu faſciis, quæ dicuntur plattes ban-
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des & </
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<
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xml:space
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">moulures, præter id quod in primo ortu tormenti (à l’endroit de
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la culaſſe) craſſities major ſit quam quæ à nobis aſſumta fuit. </
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pauca tormenta diſrumpi, ſic non mirabimur.</
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