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

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              <s id="s.001037">
                <pb pagenum="200" xlink:href="010/01/208.jpg"/>
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              aut hydrargyrum; procùl dubio corpus L intra flui­
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              dum M demerſum ſursùm aſcendet. </s>
              <s id="s.001038">
                <expan abbr="Demonſtrandũ">Demonſtrandum</expan>
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              modò eſt idipſum non ſpontaneo motu ab intrinſeco
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              principio leuitatis aſcendere. </s>
              <s id="s.001039">Si hoc enim verum̨
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                <figure id="id.010.01.208.1.jpg" xlink:href="010/01/208/1.jpg"/>
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              non eſt, ſit, ſi fieri poteſt leuitas
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              corporis L naturalis cauſa, &
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              virtus à qua ſpontaneo motu
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              ſursùm impellatur in fluido M.
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              </s>
              <s id="s.001040">Et primò pręparetur infima ba­
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              ſis AB cylindri homogenei ipſi
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              L, vt nimirùm ei vniatur ferru­
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              mineturque lamina aliqua vi­
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              trea, vel metallica, quæ ſit op­
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              timè explanata, & læuigata, & eiuſdem materiæ, at­
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              que figuræ, & læuitatis ſit pauimentum, vel fundum
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              putei DE. </s>
              <s id="s.001041">Secundo loco reperta iam ſit
                <expan abbr="mẽſura">menſura</expan>
              cer­
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              ta, & determinata illius virtutis, quæ requiritur ad
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              ſeparandam, & diuellendam ſuperficiem vitri AB ab
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              immediato contactu cum fundo putei DE, ſiuè vis
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              illa, quæ ſuperare valet reſiſtentiam prædictarum̨
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              ſuperficierum ſe tangentium ad vacuum admitten­
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              dum; ſupponamuſque huiuſmodivim eſſe æqualem̨
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              ponderi G, atque reperiatur cylindrus AC eiuſdem
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              materiei L itaut vis leuitatis qua conatur ſursùm mo­
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              ueri in fluido M vna cum vitrea lamina AB maior ſit
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              vi, & energia ponderis G, ſitque vis illa leuitatis æ­
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              qualis potentię H. quapropter vis qua ſolidum AC
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              conatur, & impetum facit vt ſursùm in dato fluido
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              aſcendat, maior eſt illa vi, & facultate, quæ requi-</s>
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