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

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              aſcenſus minoris ponderis factus à deſcenſu corpo­
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              ris grauioris alteram lancem prementis, ineptè qui­
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              dem, & iniuria violentia appellatur; propterea quòd
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              huiuſmodi operatio, ac diſpoſitio neceſſaria, ac na­
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              turalis eſt. </s>
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            <p type="margin">
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              Prop. 1.</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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              <s id="s.000424">Idipſum, vel quid ſimile, dici debet de extruſione
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              cuiuslibet corporis minùs grauis facta à preſſionę
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              ambientis fluidi grauioris, quia in tali caſu (vt ſuo lo­
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              co oſtenditur) adeſt libra quædam imaginaria per­
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              petua, cuius centrum grauitatis ſucceſſiuè deprimi­
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              tur, &
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                <expan abbr="deſcensũ">deſcensum</expan>
              neceſſariò conſequitur mo­
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              tus ſublimationis corporis minùs grauis, hocque
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              diù perſeuerat, quouſque efficiatur æquilibrium. </s>
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                <expan abbr="">Cum</expan>
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              igitur ſit effectus neceſſarius, & naturalis, extruſio,
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              ſeù aſcenſus ligni quotieſcumque circumdatur à flui­
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              do grauiori, non poteſt, nec debet prædictus aſcen­
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              ſus nuncupari, vel reputari violentus, quod erat
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                dendum</expan>
              . </s>
              <s id="s.000426">Hoc confirmari poteſt ex Galilei pulcher­
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              rimo ratiocinio. </s>
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            <p type="margin">
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              Prop. 9.</s>
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              PROP. XL.
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            <p type="main">
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              Motus aſcenſus grauium non minùs naturalis eſt, quàm
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              deſcenſus eorundem.
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                <emph.end type="center"/>
              </s>
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            <p type="main">
              <s id="s.000430">FInge globum noſtræ terræ perforari puteo
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                trum</expan>
              extenſo vſque ad Antipodas producto, at­
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              que in hoc demiſſa pila ferrea proculdubio natura­
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              lis eius grauitas ſucceſſiuè maiorem impetum acqui­
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              ret, quòuſque ad centrum terræ pertingat, & vniuer-</s>
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          </chap>
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