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

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              <s id="s.000050">
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              percipitur quomodo à naturali operatione, deſcen­
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              ſus nempè deorſum, produci debeat operatio
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              contraria, aſcenſus nimirum alterius partis eiuſdem
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              fluidi ſcilicet recedendo a centro telluris. </s>
              <s id="s.000051">erit igitur
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              operæpretium perſpicuè oſtendere veritatem præ­
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              dictæ operationis, eamque deducere ex principijs
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              magis notis, & euidentibus. </s>
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              Cap. 2. dę
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              momentis
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              grauium in
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              fluido inna­
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              tantium.</s>
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              PROPOSITIO I.
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              Grauis ſuſpenſi non ex centro ſuæ grauitatis vna eius pars
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              ſurſum aſcendit quiæ integrum graue
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              deſcendit.
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                <emph.end type="center"/>
              </s>
            </p>
            <p type="main">
              <s id="s.000055">Sit graue AB extenſum, vel compoſitum ex dua­
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              bus partibus in extremitatibus eiuſdem libræ
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              horizontalis AB diſpoſitis, & commune centrum gra­
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              uitatis earum ſit D. ſuſti­
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                <figure id="id.010.01.013.1.jpg" xlink:href="010/01/013/1.jpg"/>
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              neatur poſtea, fulciatur­
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              que tota libra ex puncto
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              C remoto à centro graui­
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              tatis D. dico quòd pars
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              eius oppoſita B ſurſum̨
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              aſcendet per arcum BF,
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              hac ſolummodo de cauſą
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              quia integrum graue AB magis, quàm prius ad cen­
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              trum terræ accedit. </s>
              <s id="s.000056">quia duæ partes graues A & B
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              exercent ſuam grauitatem & conatum compreſſiuum
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              in centro communi earum grauitatum D; eſt que
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              prædictum centrum D remotum à fulcimento ſtabili
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              C, igitur efformabitur veluti fune-pendulum CD </s>
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          </chap>
        </body>
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