Borelli, Giovanni Alfonso, De motionibus naturalibus a gravitate pendentibus, 1670

Table of figures

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              <s id="s.002231">
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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
                <expan abbr="exercẽs">exercens</expan>
              ;
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              nec libero motu deſcendere valent, cum cogantur
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              vertiginoſo motu circa fulcimentum eius agitari
                <expan abbr="cõ-trarijs">con­
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                trarijs</expan>
              lationibus. </s>
              <s id="s.002232">In ijs planè concedimus pondera
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              inæqualia diuerſimodè operari ob libræ
                <expan abbr="naturã">naturam</expan>
              ,
                <expan abbr="quã">quam</expan>
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              non videtur prædictus author benè percepiſſe. </s>
              <s id="s.002233">Opor­
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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
                <expan abbr="experiẽtia">experientia</expan>
              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
                <expan abbr="grauiũ">grauium</expan>
              .</s>
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              Reſponde­
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              tur tereiæ.</s>
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              <s id="s.002236">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
                <expan abbr="deſcẽſu">deſcenſu</expan>
              duo­
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              rum inæqualium ponderum falſitatem peripatetici
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              pronunciati euidentiſſimè comprobauit. </s>
              <s id="s.002237">Sed interim
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              aio, quod retardatio vibrationis leuioris funependu­
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              li producitur ab impedimento, & obſtaculo aeris, </s>
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