Achillini, Alessandro (Achillinus, Alexander), Alexandri Achillini bononiensis De proportionibus motuum quaestio. , 1545

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              <s id="id.0.5.54.06">
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              grave ut 4 leve ut </s>
              <s id="id.0.5.54.07">Tunc utrunque proportione sesquialtera movet. quia Sortes a proportione 6 supra 4 Plato vero a proportione 9 supra </s>
              <s id="id.0.5.54.08">Tunc duplentur potentiae. Sortes movet a tripla proportione scilicet a 12 ad 4 Plato vero a dupla sesquitertia scilicet a 15 ad 6 tunc crescat resistentia per 2. tunc Sortes movere non potest, quia virtus eius est ut </s>
              <s id="id.0.5.54.09">Et resistentia est ut </s>
              <s id="id.0.5.54.10">Et Plato potest. quia virtus eius est 9. resistentia vero est ut </s>
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              <s id="id.0.5.55.01">Ad primum effectus per se gravium est descendere, et isti a duplis causis dupli sunt, sed sonus est effectus eorum per accidens, quia a percutiente et percusso et medio fit. secundo de anima textu commenti 78 ideo non oportet ex duplis causis sonum duplari. quia autem distractio chordae violenta est, et quanto maior est distractio, tanto violentior est ipsi chordae. quia fractioni chordae praeparat, quae est chordae corruptio: ideo chorda fortius resistit et </s>
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              <s id="id.0.5.56.01">Ad secundum, tertium, et quartum conceduntur conclusiones tanquam </s>
              <s id="id.0.5.56.02">Sint deo laus gloria et </s>
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