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

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            <p type="main">
              <s id="s.000563">
                <pb pagenum="113" xlink:href="010/01/121.jpg"/>
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                <lb/>
              in vaſe nedùm deorsùm comprimat, vt grauis, ſed
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              etiam non omninò priuetur gradu aliquo leuitatis,
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              tunc ſimilitèr libra perpetua imaginaria efformabi­
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              tur in qua terminus I deorsùm impellitur ab exceſſu
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              quo grauitas aquæ D ſuperat
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                <figure id="id.010.01.121.1.jpg" xlink:href="010/01/121/1.jpg"/>
                <lb/>
                <expan abbr="grauitatẽ">grauitatem</expan>
              ligni F, & è
                <expan abbr="cõtràter-minus">contràter­
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                minus</expan>
              B
                <expan abbr="ſursũ">ſursum</expan>
              eleuabitur ab ex­
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              ceſſu quo leuitas ligni ſuperat
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              leuitatem ipſius aquæ. </s>
              <s id="s.000564">Et quia
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              prædicti impulſus ſunt contra­
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              rij, applicanturque eidem li­
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              bræ imaginariæ, igitur vnus impulſus alteri non op­
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              ponitur, & proindè vniuerſalis conatus, & impetus
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              prædictæ libræ, ſcilicèt vis, & impetus, quo lignum
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              F aſcendit in aqua menſuratur ab vtroque exceſſu,
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              ſcilicèt ab aggregato differentiæ ponderum aquæ,
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              & ligni, vnà cum exceſſu leuitatis ligni ſupra aqueam
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              leuitatem. </s>
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            <p type="margin">
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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.000566">
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              Prop. 50.</s>
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            <p type="main">
              <s id="s.000567">
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              SVPPOSITIO V.
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              <s id="s.000568">HIs præmiſſis ſupponamus cum aduerſarijs pri­
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              mo loco, quòd reuerà præter corpora grauią
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              etiam leuia in natura exiſtant, quorum aliqua, vt ait
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              Ariſtoteles, ſint ſimplicitèr talia, alia verò reſpectiuè,
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              veluti ignis dicitur abſolutè leuis, & terra, ſeù hy­
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              drargyrum, vel aliud fluidum æquè graue, ac ipſą
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              terra eſt appellabitur abſolutè graue
                <expan abbr="reperiũtur">reperiuntur</expan>
              po­
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              ſtea alia corpora intermedia ſimplicia, vel mixtą,
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              quæ vocantur grauia ſimùl, & leuia reſpectiuè, ſcili-</s>
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