Baliani, Giovanni Battista, De motu naturali gravium solidorum, 1638

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              <s id="s.000314">PROPOSITIO XXVI.
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                <s id="s.000315">Si in circulo erecto, a puncto inferiori ducantur plana
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                ad puncta peripheriae, & a dictis punctis descendant
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                gravia super dicta plana eodem tempore quo a puncto su-
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                premo descendit aliud grave perpendiculariter; perve-
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                nient omnia eodem instanti ad dictum punctum inferius.
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                </s>
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            <p>
              <s id="s.000316">Sit circulus cuius diameter ABC erectus super plano
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              orizontali, quod tangat in C, & a C ducantur plana C
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              D, CE, & a punctis, E, D gravia descendant super dicta
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              plana, nec non, & a puncto supremo A perpendiculariter.
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              </s>
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              <s id="s.000317">Dico quod eodem tempore perveniunt in C.
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              <s id="s.000318">A puncto A ducantur AF, AG paralellae ipsis CE, CD,
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              & ducantur AF, FC.
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              <s id="s.000319">Quoniam in triangulis AEC, AFC anguli alterni FAC,
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              ACE sint aequales,
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              , & anguli AFC, AEC sunt etiam
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              aequales puta recti
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              , & basis AC communis, Triangula
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              sunt aequalia
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              , & proinde AF est aequalis CE, quod idem
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              probabitur de reliquis, ergo cum AF, CE, & reliquae
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              sint paralellae, & aequales, gravia per CE, CD perve-
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              nient in C eodem tempore, quo digressa ab A perveniunt
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              ad puncta FG, sed haec eodem tempore quo perpendicularis
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              pervenit in C
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              , ergo etiam ea quae per CE, CD. </s>
              <s id="s.000320">Quod, &c.
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              Per 29.
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              primi.
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              Per 30.
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              Tertii.
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              Per 26.
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              primi.
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              </s>
              <s id="s.000324">
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              Per 25.
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              hujus.
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              </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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