Gassendi, Pierre
,
De proportione qua gravia decidentia accelerantur
,
1646
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motu, accelerari pergat ab I, in L, ſed per parteis in
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tegri diei: quæſo, dices ne huiuſmodi accelerationem
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eſſe vn formem? </
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<
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ac ipſi gradus velocitatis repræſentati iuxta te paralle
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lis ED, GF, IH, LK, cum interceptis omnibus, ha
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bituri ſunt inter ſe, eandem rationem, quam ipſæ par
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tes ſpati, repræ entatæ iuxta te partibus lineæ AC.
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<
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">Quòd ſi id reputes abſurdum; abſurdum quoque vi
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deri debet metiri accelerationem, ac vniformem po
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tiſſimùm, penes ſpatium, non penes tempus: atque
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idcircò lineam AC comparatam ad eas parallelas pro
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velocitatibus habitas, non pro tempore, ſed pro ſpatio
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habere. </
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<
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">Enim verò, vt expreſſiùs dicam quamobrem lineæ
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DE, FG, & parallelæ cæteræ accipi non poſſint pro
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gradibus velocitatis, ſi partes lineæ AC accipiantur pro
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ſpatij, non pro temporis partibus, ac ſimul inſinuem
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quid diſcriminis circa repræſentationem per eandem
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figuram, inter vtramque hypotheſin ſit, rem ecce
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paucis ita deduco. </
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<
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">Si DE ſit velocitatis gradus, qui per
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additamenta continua à puncto A ſecundum trian
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gulum ADC, acquiſitus ſit, dum mobile AE percur
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rit; quæro quî euadat hic gradus, vbi deinceps mobi
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le pergendo decurrit EG? </
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<
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">Non ſane: quoniam alioquin mobili perueniente ex
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A in G non reperiretur acquiſitus in G, niſi vnus velo
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citatis gradus; quatenus etiam per te, ſeu ex vulgari de
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finitione, additamenta ex E in G æqualia ſunt addita
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mentis ex A in E, nec poteſt proinde ab vſque E ac
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quiſitus eſſe, niſi gradus vnus, v. c. FP æqualis ipſi DE </
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