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

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    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <s id="s.000590">
                <pb pagenum="118" xlink:href="010/01/126.jpg"/>
                <arrow.to.target n="marg145"/>
              </s>
            </p>
            <p type="margin">
              <s id="s.000591">
                <margin.target id="marg145"/>
              Cap. 4. poſi­
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              tiuam leui­
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              tatem noņ
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              dari.</s>
            </p>
            <p type="main">
              <s id="s.000592">
                <emph type="center"/>
              PROP. LVII.
                <emph.end type="center"/>
              </s>
            </p>
            <p type="main">
              <s id="s.000593">
                <emph type="center"/>
                <emph type="italics"/>
              Si Aer in aqua ſolummodò leuitatem exerceret, in ea non
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              aſcenderet à leuitate eius poſitiua impulſus.
                <emph.end type="italics"/>
                <emph.end type="center"/>
              </s>
            </p>
            <p type="main">
              <s id="s.000594">ET primò ſupponamus prædicta elementa noņ
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              retinere ſimùl eodemque tempore duas oppo­
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              ſitas facultates grauitatis, & leuitatis, ſed ſucceſſi­
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              uè modò vnam, modò alteram poſſideant, prout in
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              diuerſis medijs fluidis collocantur, ſcilicèt aqua iņ
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              aere pendula ſolummodò grauis cenſeri debeat, non
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              autem leuis, ſi poſtmodum aqua infrà hydrargyrum
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              mergatur, tunc aqua leuis ſit, non autem grauis, po­
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                <figure id="id.010.01.126.1.jpg" xlink:href="010/01/126/1.jpg"/>
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              natur etiam, quod aer, ſeù
                <expan abbr="lignũ">lignum</expan>
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              ſub aqua demerſum leue ſit, nec
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              grauitatem vllam habeat. </s>
              <s id="s.000595">Con­
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              cipiatur poſtea vas RGHS a­
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              qua D plenum, & in eo merga­
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              tur maſſa aeris, vel ligni F, pa­
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              tet ergò ex ſupradicta hypo­
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              theſi, quod aqua D
                <expan abbr="nullã">nullam</expan>
              leuitatem, ſed tantummo­
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              dò grauitatem habebit, eò quòd prædicta aqua non
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              ſupponitur demerſa intra aliud corpus fluidum den­
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              ſius, & ponderoſius ipſa, ſed contigua eſt aeri. </s>
              <s id="s.000596">Mo­
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              dò quia aer, vel lignum F ſupponitur ab aduerſarijs
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              ſursùm aſcendere à G, versùs R impulſa à poſitiua
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              leuitate eius naturali, aqua verò circumfuſa D cona­
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              tum, atque impetum exercet deorsùm ab A versùs
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              H veluti natura eius grauitatis exigit, habebimus </s>
            </p>
          </chap>
        </body>
      </text>
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