Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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profectò naturæ ſunt duo pondera ſuſpenſa, vel an
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nexa in libra, rota, & veru, quæ componunt vnum̨
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mobile in centro grauitatis communis vim
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exercẽs
">exercens</
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;
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nec libero motu deſcendere valent, cum cogantur
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vertiginoſo motu circa fulcimentum eius agitari
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abbr
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">con
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trarijs</
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lationibus. </
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<
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id
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">In ijs planè concedimus pondera
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inæqualia diuerſimodè operari ob libræ
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abbr
="
naturã
">naturam</
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,
<
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abbr
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quã
">quam</
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non videtur prædictus author benè percepiſſe. </
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<
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id
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tet ergo vt ſumamus duos globos ferreos inæquales
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ſolutos, ſeparatoſque qui in aere demittantur, vt li
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berè, & abſque impedimento deſcendere poſſint per
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rectas lineas ad centrum terræ tendentes, cùmque in
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hac
<
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abbr
="
experiẽtia
">experientia</
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>
velocitates deſcenſuum ferè æquales
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ſint licèt pondera deſcendentia ſint valdè inter ſę
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inæqualia, facilè ſuademur quod ab aliqua circum
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ſtantia in bilancibus, rotis, & veru impeditur, & per
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turbatur effectus ille, qui in ſimpliciſſima operatio
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ne obſeruabatur, quod fuſiùs in ſequenti capite de
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clarabitur.
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Cap. 10. de
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æquitempo
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ranea natu
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rali veloci
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tate
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abbr
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grauiũ
">grauium</
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>
.</
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</
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type
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Reſponde
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tur tereiæ.</
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<
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id
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">Ad tertiam nego Galileum deduxiſſe grauia inæ
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qualia deſcendere velocitatibus æqualibus debere
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ex hac experientia, quod funependula æquè longa,
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& inæqualiter ponderoſa efficiunt vndulationes æ
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quitemporaneas; non enim ex hac operatione, quæ
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difficilioris indaginis eſt, ſed ex libero
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abbr
="
deſcẽſu
">deſcenſu</
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>
duo
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rum inæqualium ponderum falſitatem peripatetici
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pronunciati euidentiſſimè comprobauit. </
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<
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">Sed interim
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aio, quod retardatio vibrationis leuioris funependu
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li producitur ab impedimento, & obſtaculo aeris, </
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