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

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            <p type="main">
              <s id="s.002278">
                <pb pagenum="439" xlink:href="010/01/447.jpg"/>
                <arrow.to.target n="marg585"/>
                <lb/>
              proportionis reperitur inter totale motus impedi­
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              mentum, ſcilicèt inter quietem quam affert aqua de­
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              ſcenſui ligni, & impedimentum quod eidem affert
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              aer quieſcens, in quo aliquo gradu velocitatis mo­
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              uetur; quia verò quam proportionem habent velo­
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              citates ex aduerſario, eamdem reciprocè habere de­
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              bent denſitates mediorum fluidorum; diſtat verò in­
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              finitè quies à motu, igitur infinitè quoque diſtarę
                <lb/>
              deberent inter ſe, reciprocè denſitates fluidorum, &
                <lb/>
              proindè aqua infinitè denſior aere eſſet, ſic enim nul­
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              lam proportionem eorum denſitates haberent, quod
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              eſt omninò abſurdum; ex quibus omnibus deducitur
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              falſum eſſe aduerſarij ratiocinium. </s>
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            <p type="margin">
              <s id="s.002279">
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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>
            </p>
            <p type="main">
              <s id="s.002280">Poſtquam oſtendimus naturalia corpora in vacuo
                <lb/>
              moueri, non in inſtanti, ſed in tempore debere, &
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              præterea corpora inæqualitèr grauia non moueri ſe­
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              cundum proportionem, quam habent eorum graui­
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              tates, debemus poſtremo loco
                <expan abbr="oſtẽdere">oſtendere</expan>
              , quod ſi om­
                <lb/>
              nia impedimenta, quæ dependent à medio fluido in
                <lb/>
              motionibus corporum grauium tolli poſſent, quod in
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              ſpatio inani verificari poſſet, tunc planè omnia cor­
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              pora inæqualitèr grauia ſpecie, & mole, quibuſcum­
                <lb/>
              que figuris prædita, eodem tempore per idem
                <expan abbr="ſpatiũ">ſpatium</expan>
                <lb/>
              deſcendere deberent. </s>
              <s id="s.002281">Hanc | ad mirabilem propoſitio­
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              nem Galileus omnium primus protulit dialogo pri­
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              mo de motu locali, & in ſuis poſtillis non dum typis
                <lb/>
              excuſis, eam tamen non demonſtrauit, ſed coniectu­
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              ris, & probabilibus
                <expan abbr="tantũmodò">tantummodò</expan>
              rationibus confir­
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              mare conatus eſt; quia verò huiuſmodi propoſitio v-</s>
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          </chap>
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