Marci of Kronland, Johannes Marcus, De proportione motus figurarum recti linearum et circuli quadratura ex motu, 1648

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              bos ad prop. 37. poriſ. 1. & 2. problem. 1. in lib. de proport:
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              motûs. </s>
              <s>Eadem verò eſt ratio reliquarum magnitudinum:
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              ſiue eiuſdem, ſiue alterius ſint figuræ. </s>
              <s>Nam quòd percutiens
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              à motu quieſcit, huius ratio eſt æqualitas ponderis: quæ to­
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              tam in percuſſo exhaurit plagam. </s>
              <s>Vtverò circulus B ad circu­
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              lum ſibi æqualem A, ita idem circulus ad quadratum ſibi æqua­
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              le C:
                <expan abbr="eſtq;">eſtque</expan>
              contactus
                <expan abbr="utriusq;">utriusque</expan>
              in puncto G & F. ſicuti ergo A eſt
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              hypomochlium totius grauitatis ſeu impulſus in B; ita C hy­
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              pomochlium eſt eiuſdem grauitatis ſeu impulſus. </s>
              <s>Impulſus
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              autem æqualis ad magnitudinem æqualem eandem habet
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              rationem. </s>
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              THEOREMA I.
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              Grauitas mouens partium ìn toto eſt minor grauitate mouente
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              extra illud totum.
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              <s>Sit B grauitas mobilis, & A mundi centrum:
                <expan abbr="eritq;">eritque</expan>
              linea BA
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              motus centri per 3, Axioma: partium verò HD motus eidem
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                <arrow.to.target n="fig6"/>
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