Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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bet, & quia hoc ſemper repetitur, ſcilicèt perpetuò
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reſtituitur in ſuperiori loco AI aqua duplò grauior,
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quàm ea, quæ in loco infimo HD reponitur, igitur
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vt contingit in libra efficientur perpetuæ, & conti
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nuatæ vibrationes, veluti in pendulo, & in aqua fie
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ri ſolent plures vndulationes, ſic in aqua perpetuo
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motu agitarentur eius partes aſcendendo, & deſcen
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dendo. </
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<
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">hoc verò ſenſus euidentia redarguit, igitur
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fatendum eſt ſupremam aquam AI ſuſtentatam ab
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inferiori aqua ſuper eam non exercere vim vllam̨,
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nec preſſionem, proinde que non grauitare, hac ſcili
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cet de cauſa, quia nimirùm in eius loco naturali col
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locata re quieſcit, ac ſiſtitur. </
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Contra do
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ctrinam ſu
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periùs addu
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ctam adeſt
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noua difficul
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tas, quod ni
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mirum mo
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tu perpetuo
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aqua agitari
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deberet.</
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Cap. 3. flui
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dum in ſuo
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toto quie
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ſcens ponde
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rat.</
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PROP. XVIII.
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Maior aquæ moles alteri ſupe poſita non exercet maiorem
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vim compresſiuam, quàm minor.
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">VT verò huiuſmodi paralogiſmus detegatur,
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nimaduertendum</
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eſt minimè verum eſſe, quòd
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quælibet aquæ moles maior alterà,
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dupla, exer
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ceat quoque duplam vim grauitantem quotieſcum
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que maior ſupra minorem inſiſtat, & ab ea fulciatur,
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ſed tunc ſolummodò propoſitio verificatur quando
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earum baſes
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cõtiguæ
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æquales fuerint, ac inſuper in
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eodem plano horizonti parallelo conſtiterint. </
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ponatur vas cylindricum plenum aqua ABDC, ſit
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que portio ſuprema, & ideò eius altitudo AH dupla
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infimæ altitudinis HB, licèt ergo reuerà ſupremæ </
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