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

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              <s id="s.000822">
                <pb pagenum="163" xlink:href="010/01/171.jpg"/>
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              ſe ſumptum, tamen ſi grauitas ſpecifica conſidere­
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              tur, erit aggregatum ex oleo, & aere minùs graue,
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              quàm oleum ſolum, quia nempè pondus aggregati
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              ex oleo & aere, minorem proportionem habet ad
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              grauitatem molis aqueæ ei æqualis, quàm pondus
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              ſolius olei habeat ad
                <expan abbr="grauitatẽ">grauitatem</expan>
              aquæ molis prædicto
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              oleo æqualis, ſcilicèt ſi aggregati ex oleo, & aere
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              grauitas ſubdupla fuerit pondere molis aquæ ſibi æ­
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              qualis, pondus olei ſolius maius erit medietate
                <expan abbr="põ-deris">pon­
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                deris</expan>
              molis aquæ oleo æqualis, & hinc ſit vt maiori
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              impetu ſursùm per expreſſionem impellatur aggre­
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              gatum ex oleo & aere à ſuperabundanti grauitate
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              aquæ circumfuſæ, quæ maiori differentia ſpecificam
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              grauitatem eius ſuperat, quàm moueatur oleum ſur­
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              sùm extruſum à pondere minùs excedenti eiuſdem̨
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              aquæ ambientis. </s>
              <s id="s.000823">Et hoc quidem ſi ritè percipiatur,
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              tollentur, & euaneſcent omnes difficultates, quæ
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              contra prædictam doctrinam afferri poſſunt. </s>
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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="margin">
              <s id="s.000825">
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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.000826">Præter ea, quæ iam dicta ſunt affert idem author
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              alia experimenta ex quibus putat euidentèr deduci
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              poſſe exiſtentiam leuitatis poſitiuæ, quia inquit:
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              Cylindrus ligneus è fundo aquæ ſursùm tanto impetu fertur
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              vt multotiès exiliat totus ſupra aquam ille igitur ſaltus in­
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              dicium eſt impetus ab intrinſeca leuitate facti, quia aqua
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              non poteſt illud vltrà trudere quam ſit ipſi opus vt locum
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              inferiorem occupet niſi ipſa ſursùm priùs feratur, quod eſt
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              contra ipſius grauitatem.
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              </s>
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          </chap>
        </body>
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