Guevara, Giovanni di, In Aristotelis mechanicas commentarii, 1627

Table of figures

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              eleuandæ, maiorem exceſſum ponderis, aut virtutis videre­
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              tur requirere in parte eleuante. </s>
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              <s id="N145DF">Dicimus ergo huiuſmodi diſparitatem deſumendam eſſe
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              ex propria conditione materiæ. </s>
              <s id="N145E4">Nam axis materialis circa
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              quem vertitur, cum non ſit indiuiſibilis; neceſſariò ſecundum
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              plures ſui partes, ac puncta correſpondet partibus, ac pun­
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              ctis incumbentibus ipſius rotæ, vel libræ, quam ſuſtinet.
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              <s id="N145EE">Quare ad eleuandam verbi gratia partem ſiniſtram libræ,
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              vel rotæ per depreſſionem dexteræ inter quas mediat cen­
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              trum grauitatis, conſequenter obſtabit pars illa axis corre­
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              ſpondens ipſi dexteræ incumbenti, ac deprimendæ, eritque
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              veluti fulcimentum vectis ad eleuandam non modo partem
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              ſiniſtram, ſed etiam punctum medium, quod eſt centrum
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              grauitatis tanquam præcipuum onus. </s>
              <s id="N145FD">Vnde licet propter
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              maximam approximationem
                <expan abbr="fulcimẽti">fulcimenti</expan>
              ad huiuſmodi onus,
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              facilè onus ipſum, ſeu centrum grauitatis aliquantulum ele­
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              uetur; non per hoc tollitur, quin eo difficilius iſte motus
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              exerceatur, quo maius fuerit pondus incumbens per ipſum
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              centrum grauitatis; ac proinde maior virtus requiratur ad
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              ſuperandam ipſam reſiſtentiam, ac maiorem difficultatem
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              Quod non ita contingeret ſi libra, vel rota ſuſpenderetur per
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              axim indiuiſibilem, ac centrum ipſum grauitatis. </s>
              <s id="N14616">Nam hoc
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              æquè ſemper ſuſtineretur, ſiue in motu, ſiue inquietè ipſius
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              libræ, vel rotæ. </s>
              <s id="N1461D">Imo ſemper quieſceret, nec vlla eſſet reſi­
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              ſtentia partium axis explicata, ſiue pondus incumbens eſſet
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              grauius, ſiue leuius. </s>
              <s id="N14624">Ideoque nullo negotio ad quem­
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              libet exiguum impulſum, vel modicam additio­
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              nem ponderis ſtatim ab æquilibrio, & à
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              quiete dimoueretur omnis quan­
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              tumuis ingens, & grauiſſi­
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              ma libra, vel
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              rota. </s>
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