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

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            <p type="main">
              <s id="s.000913">
                <pb pagenum="179" xlink:href="010/01/187.jpg"/>
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                <lb/>
              æqualis erit differentiæ prædictarum oppoſitarum
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              celeritatum, & ideò aer G deſcendet duplo tardiùs
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              aqua ambiente; Quòd verò hoc ſit falſum, experien­
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              tia ipſa docet ſi nimirùm aqua DE atro colore tinga­
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              tur, vel diſperſo puluere terreſtri pauliſper turbida
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              reddatur, tunc procùl dubio particulæ illæ arenoſæ
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              graues, aut ob exiguitatem in ipſa aqua dum quieſcit
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              non deſcendunt, vel lento motu deorsùm feruntur a
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              vi maioris grauitatis
                <expan abbr="earũ">earum</expan>
              . </s>
              <s id="s.000914">igitur quando aqua deor­
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              sùm fluit, videtur impoſſibile vt grauiores particulæ
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              arenoſæ minori velocitate transferantur deorsùm̨,
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              quàm aqua ipſa in qua degunt, quare bulla aerea G
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              quæ vt leuis ſursùm aſcendere ſupponitur, non poſſet
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              pari velocitate ſimul
                <expan abbr="cũ">cum</expan>
              particulis terreis aquæ tur­
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              bidæ deorsùm deſcendere, ſed hoc eſt falſum, cum
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              abſque vlla differentia velocitatis deorsùm feran­
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              tur vnà cum aqua turbida cylindri fluentis, igitur ve­
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              rum non eſt, quòd aer G moueatur ſursùm à vi natu­
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              ralis leuitatis eius translatus, cùm
                <expan abbr="aliũdè">aliundè</expan>
              quando re­
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              uera aer G principium motiuum leuitatis in ſe habe­
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              ret non poſſet vllo pacto in aqua ipſum
                <expan abbr="nõ">non</expan>
              exercere. </s>
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            <p type="margin">
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              Cap. 4. poſi­
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              tiuam leui­
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              tatem noņ
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              dari.</s>
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            <p type="main">
              <s id="s.000916">
                <emph type="center"/>
              PROP. LXXXVIII.
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            <p type="main">
              <s id="s.000917">
                <emph type="center"/>
                <emph type="italics"/>
              Confirmatur aerem ab ambiente aqua per extruſionem ſur­
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              sùm impelli.
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                <emph.end type="center"/>
              </s>
            </p>
            <p type="main">
              <s id="s.000918">EContrà quandò globus aereus G nullam pror­
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              sùs leuitatem haberet, & ſolummodò per ex
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              truſionem factam à grauitate fluidi ambientis eleua-</s>
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          </chap>
        </body>
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