Fabri, Honoré, Tractatus physicus de motu locali, 1646

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              APPENDIX PRIMA
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              PHYSICOMATHEMATICA,
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              De centro percuſsionis.
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            <p id="N2952B" type="main">
              <s id="N2952D">DE duplici centro hactenus actum eſt,
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              magnitudinis, ſcilicet, & grauitatis;
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              præſertim de hoc vltimo: </s>
              <s id="N29535">in quo certè
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              opere non ſine maxima laude præ­
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              ſtantiſſimi Mathematici deſudarunt,
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              ſcilicet Archimedes, Commandinus, Lucas Vale­
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              rius, Steuinus, Guldinus, Galileus paucis: </s>
              <s id="N29541">ſed du­
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              plex aliud centrum conſiderari poteſt; </s>
              <s id="N29547">primum di­
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              citur centrum impreſſionis: vtrumque prorſus inta­
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              ctum aliis doctâ paucarum licèt propoſitionum co­
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              ronâ, vel peripheria in hac appendice corona­
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              mus.
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            <p id="N29556" type="main">
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              DEFINITIO I.
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            <p id="N29564" type="main">
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              CEntrum grauitatis eſt punctum, quod omnia grauitatis momenta æqua­
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              liter dirimit.
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              </s>
            </p>
            <p id="N2956F" type="main">
              <s id="N29571">Clara eſt definitio; centrum enim grauitatis eſt illud punctum, ex
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              quo pendulum corpus per quamlibet lineam ſeruat æquilibrium. </s>
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            <p id="N29577" type="main">
              <s id="N29579">
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              Definitio
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              2.
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              </s>
            </p>
            <p id="N29586" type="main">
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              Centrum impreſſionis eſt illud, per quod, ſi ducatur planum vtrimque, di­
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              rimit æqualem impetum.
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            <p id="N29591" type="main">
              <s id="N29593">Hæc etiam clara eſt; </s>
              <s id="N29597">conſideratur autem impetus non modò ratione </s>
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          </chap>
        </body>
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    </archimedes>