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

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              Cap. 3. flui­
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              dum in ſuo
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              toto quie­
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              ſcens pon­
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              derat.</s>
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              <s id="s.000228">
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              PROP. XIX.
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            <p type="main">
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              Lignum infra aquam demerſum, licèt pondus proprium, &
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              aquæ incumbentis exerceat, non proinde ibidem
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              quieſcet.
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            <p type="main">
              <s id="s.000230">VT autem huius argumenti falla cia patefiat, in
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              vaſe ARSE aqua pleno demergatur priſma li­
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              gneum, vel aereum HBDI ſitquę
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              pondus aquæ AI decem librarum̨
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              v. g. lignum verò HD ſemilibram̨
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              pendeat. </s>
              <s id="s.000231">Concedo, quòd lignum̨
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              HD premit ſubiectam aquam BV
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              non vi ſemilibræ, ſed robore libra­
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              rum decem, & ſemis, & ideo
                <expan abbr="lignũ">lignum</expan>
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              HD magis comprimit, ac grauitat,
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              quàm ſola aqua incumbens AI, ſed non proindè ſe­
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              quitur, lignum HD quatenùs magis comprimit, ac
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              grauitat in fundo aquæ perſiſtere debere, cùm ab
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              alia cauſa ſursùm exprimatur. </s>
              <s id="s.000232">Secto enim priſmatę
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              aqueo CEFI æquali ipſi AI, & aqueo priſmate IG
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              cuius moles æqualis ſit ligno HD, & eius pondus
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              duas libras ſuperet; patet quòd aqua ſubiecta BV
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              premitur à pondere librarum decem, & ſemis, at
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              aqua DS comprimitur à pondere librarum duode­
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              cim; ergo sipho, vel libra mobilis aquea BG flecti
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              debet eleuando lignum HD minus graue. </s>
              <s id="s.000233">Et hinc
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              patet, quòd ratio, quare lignum aſcendit, non eſt
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              pondus aquæ incumbentis AI, ſed eſt aqua collate-</s>
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        </body>
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