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

Table of figures

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    <archimedes>
      <text>
        <body>
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            <p type="main">
              <s id="s.000568">
                <pb pagenum="114" xlink:href="010/01/122.jpg"/>
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                <lb/>
              cèt aqua demerſa intra mercurium dicitur leuis, &
                <lb/>
              moueri ſursùm à principio intrinſeco, at ſi eadem̨
                <lb/>
              aqua intra oleum mergatur, dicetur iam grauis, noņ
                <lb/>
              leuis, & moueri deorsùm à principio interno. </s>
              <s id="s.000569">Hoc
                <lb/>
              verò duplicem ſenſum habere poteſt, aut dictæ duæ
                <lb/>
              contrariæ qualitates ſemper in eodem corpore aquæ
                <lb/>
              exiſtunt, & vigent, aut ſucceſſiuè modò vna, modò
                <lb/>
              altera in ea reperitur, ita vt aqua in fundo hydrar­
                <lb/>
              gyri poſita ſit reuera leuis, & nullo pacto grauis, &
                <lb/>
              è contià, quando eadem aqua in oleo demergitur,
                <lb/>
              hìc grauitatem habeat, & nullam prorsùs
                <expan abbr="leuitatẽ">leuitatem</expan>
              ,
                <lb/>
              itaut remaneat ſopita, & extincta leuitas illa, quæ
                <lb/>
              tanta efficacia
                <expan abbr="aquã">aquam</expan>
              ſursùm impellebat à fundo mer­
                <lb/>
              curij, igitur in primo ſenſu retinere aqua deberet
                <lb/>
              perpetuò duas contrarias qualitates, ſcilicèt leuita­
                <lb/>
              tem, & grauitatem eodem modo, ac dicuntur mixta
                <lb/>
              participare ex qualitatibus extremis, calido nempè,
                <lb/>
              & frigido, & veluti colores medij nigre dinem, at­
                <lb/>
              que albedinem participare
                <expan abbr="censẽtur">censentur</expan>
              , igitur dici de­
                <lb/>
              beret, quod in igne prorsùs, & abſolutè leui qua­
                <lb/>
              tuor integri gradus leuitatis reperiuntur, & ſimili­
                <lb/>
              tèr in ipſa terra exiſtunt quatuor gradus grauitatis,
                <lb/>
              at aer habebit tres gradus leuitatis, & vnicum gra­
                <lb/>
              dum ponderoſitatis, ſic aqua vnicum gradum lèui­
                <lb/>
              tatis, & tres grauitatis haberet, &
                <expan abbr="tãdèm">tandèm</expan>
              aliud cor­
                <lb/>
              pus medium inter aerem, & aquam, veluti forſan
                <lb/>
              eſt ſpiritus vini, habere poſſet duos gradus leuitatis,
                <lb/>
              & duos alios gradus grauitatis.</s>
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