Gassendi, Pierre, De proportione qua gravia decidentia accelerantur, 1646

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              <s id="s.000892">
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              tempore mobile ſit peruenturum ad G? </s>
              <s id="s.000893">An dices
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              ſolùm quanto tempore peruenerit ex A in E? Atqui,
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              vt faceret, oporteret velocitatem non totam permane­
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              re, ſed ſenſim deminur, vt ſi deminutio fieret ſecun­
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              dum triangulum DPE: quippe hoc ſolùm modo
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              tempus poſſet æquale fieri, dum nimirum velocitas ſie
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              decreſceret ad vſque P, vt ab vſque A reciprotè incre­
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              uiſſet. </s>
              <s id="s.000894">Quo caſu neque mobile æquabiliter moue­
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              retur; neque peruenienti in G ſupereſſet ampliùs vlla
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              velocitas: neque proinde, ſi velocitate hac decreſcente
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              intelligamus acquiri velocitatem ſecundum triangu­
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              lum DFP, acquiſita erit in G velocitas alia, quàm FP
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              ipſius DE æqualis, non dupla. </s>
              <s id="s.000895">Igitur mobile percur­
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              rens EG velocitate ſola DE percurreret ipſum tem­
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              pore breuiore, quàm percurriſſet AE. </s>
              <s id="s.000896">Quanto igitur?
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              </s>
              <s id="s.000897">Omninò dimidio. </s>
              <s id="s.000898">Siquidem cùm velocitas DE non
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              foret deminuta, ſed mobili perueniente ad G, reperi­
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              retur adhùc integra, vt puta effecta PG, ideò vim
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              ſuam exprimeret ſecundum totum quadrangulum
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              DG, hoc eſt ſecundum duos triangulos triangulo
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              ADE ſigillatim æqualeis; ſicque velocitas bis illud poſ­
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              ſet ſecundum quadrangulum DG, quod poſſet ſemel
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                <expan abbr="ſecundũ">ſecundum</expan>
                <expan abbr="triangulũ">triangulum</expan>
              ADE: atque adeò mobile perueni­
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              ret duplò citius (quod eſt dimidium temporis) ex E in
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              G velocitate DE manente eadem, quam ex A in E,
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              velocitate eadem DE increſcente à nihilo ſui. </s>
              <s id="s.000899">Atque
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              ex hoc eſt, quare adnotem, gradum, qui acquiritur, &
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              gradum, qui manet, eſſe inæqualeis; ac manentem di­
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              ci poſſe duplò maiorem, quatenùs eſt duplò poten­
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              tior, ſeu duplo fortiùs ampliúſque agens. </s>
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