Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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bus obſeruamus à qua præcisè prohibeatur tranſitus
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fluidi per rimas laterales, poſtea impleatur reliqua
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pars fiſtulæ AB aqua, & tandèm eadem vitrea fiſtu
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la termino I libræ IL radiorum æqualium ſuſpenda
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tur, atque ab oppoſito termino eius L pendeat pon
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dus M æquale ponderi ipſius vitri AC. videndum̨
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modò eſt an à ſimplici pondere M ſuſtineri poſſit vi
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trea fiſtula AC, & patet non ſufficere, quia in ſipho
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ne ACGH pondus cylindri aquei HG æquatur præ
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cisè ponderi mercurij BC, cumque pręterea aqua
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cõ-tenta
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tenta</
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in ſpatio fiſtulæ AB ferè æqualis ſit aquæ HG,
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ergò ſumma aquæ AB, & mercurij BC duplo grauior
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eſt, quam ſit cylindrus aqueus HG vt nimirùm ſi a
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qua HG fuerit vnius libræ erunt mercurius CB, &
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aqua AB ferè duarum librarum (non conſiderato
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põ-dere
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dere</
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ipſius vitri AC,) ergò vt fiat æquilibrium de
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bet addi ponderi M aliud pondus O, quod ſit æqua
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le ponderi aquæ AB, & tunc in infima libra CEG,
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ſeu ſiphone eſſicitur æquilibrium inter cylindrum a
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queum HG, & mercurium CB, in ſuprema verò li
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bra IL efficitur æquilibrium inter fiſtulam vitream̨
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AC, vnà cum aqua AB ex vna parte, & ponderæ M,
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O ex altera parte. </
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non ſuſtinetur à potentia O ſubleuante
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librã
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ſupre-mã
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mam</
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, cum nimirùm ſuſtineatur à collaterali aqua HG,
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eſt impoſſibile fiſtulam vitream AC ſuſtineri à ſo
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litario pondere M æquale grauitati ipſius vitri, niſi
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inſuper addatur alia potentia O, quæ ſuſtineat cy
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lindrum aqueum AB æquè graue ferè, ac|eſt mercu
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rius CB. </
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