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

Table of figures

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              ra ſuſpenſa, planè non agunt grauitate, quæ non ſur­
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              sùm, ſed deorsùm operari, & impellere valet; et ta­
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              men in ijs omnibus, quæ denſiora ſunt, aut copioſio­
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              ri ſubſtantia materiali donantur magis, & faciliùs
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              medij fluidi, & obſtaculorum impedimenta
                <expan abbr="ſuperãt">ſuperant</expan>
              .
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              <s id="s.002248">Non igitur à grauitate, quatenùs talis eſt medij flui­
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              di
                <expan abbr="reſiſtẽtia">reſiſtentia</expan>
              ſuperatur, ſed ab alia
                <expan abbr="cauſalõgè">cauſalongè</expan>
              diuerſa. </s>
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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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              <s id="s.002250">Sed ponamus à maiori vi motiua grauiorum cor­
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              porum magis, & faciliùs medij fluidi reſiſtentiam ſu­
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              perari, non indè ſequetur, magis grauia celeriorem̨
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              motum deſcenſus producere niſi ex accidenti, nam ſi
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              reuera efficiens cauſa velocitatis eſſet grauitas, ne­
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              ceſſariò effectus velocitatum proportionales eſſent
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              ſuis cauſis, ſcilicèt grauitatibus, vti Aduerſarius
                <expan abbr="cũ">cum</expan>
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              Ariſtotele ſuſtinere tenetur. </s>
              <s id="s.002251">hoc autem falſum eſſę
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              manifeſtum eſt; nam duæ pilæ æquales vna aurea, al­
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              tera marmorea, quæ in fluidis craſſioribus feruntur
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              velocitatibus notabili exceſſu inter ſe differentibus,
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              in aere poſtea æquè veloces eſſe videntur. </s>
              <s id="s.002252">igitur illa
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              inſignis differentia velocitatum ab
                <expan abbr="impedimẽto">impedimento</expan>
              me­
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              dij fluidi craſſioris dependet
                <expan abbr="nõ">non</expan>
              ab inæqualibus gra­
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              uitatibus, quæ æquè veloces in aere eſſe videntur. </s>
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              <s id="s.002253">Sed pro clariori huius rei euidentia ſupponamus
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              validum equum æquali velocitate currere, ac canis a­
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              liquis venaticus, ſubmergantur poſtea omninò am­
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              bo infra aquam, vel infra lutum, procùl dubio maior
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              vis, & robur equi minùs impediri poterit à denſitate
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              aquæ, vel luti, quàm canis exigua vis impediatur,
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              & propterea equus demerſus velociùs agitari, moue-</s>
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