Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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mirari profectò ſubit à quo Nuntio monentur, eiſque
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oſtenditur, vbi gentium guttæ centrum exiſtat, tranſ
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portatumque ſit, & quo ſenſu id aſſequi valeant, &
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quo appetitu afficiantur, vt eum amplecti velint; po
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ni ergo debet vis aliqua, quæ cæca neceſſitate tranſ
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ferat, retineat, conglutinetque aqueas particulas
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circa centrum guttulæ ſuſpenſæ, hæc autem vis mo
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tiua cùm non ſit determinata ad aliquam plagam, erit
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profectò vaga, & incerta, quæ nihilominùs certum̨
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gradum impetus, & proindè æqualem vim ſę
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mouendi ſursùm, deorsùm, & ad latera habebit,
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ergo hiſce omnibus motionibus agitari deberent a
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quæ, vel mercurij particulæ in ipſis guttis pendenti
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bus, & contornatis, & hoc quidem audactèr aliqui
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recentiores pronunciant, quorum ſententia (ni fal
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lor) non ſecùs, ac præcedens, facilè refelli poteſt,
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quia ſi quęlibet pars fluidi in gutta æquali vi, & ener
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gia mouetur, ſemel alterata, & perturbata eiuſdem̨
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guttæ rotunditate, ſcilicèt exporrecta aliqua mam
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milla ex eodem fluido guttam componente, non poſ
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ſet priſtinam ſphęricitatem denuò acquirere, prop
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terea quod pars illa magis à centro remota non poſ
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ſet centro guttæ approximari, niſi expelleret longiùs
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à centro reliquas partes in vallibus guttæ exiſtentes,
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nec hæ cedere locum poſſent, cùm æqualem
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ac vim habeant, ac illæ, quæ in ſummitate mammil
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læ degunt. </
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<
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diuerſi quatenùs vna portio ad infimum ſitum guttæ
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deprimitur, altera verò eleuatur, alię lateraliter
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