Valerio, Luca, De centro gravitatis solidorvm libri tres

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              ABCDFGH, ad pyramidem, vel conum ABCD.
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              <s>Rurſus quoniam axis DE, & latera pyramidis, vel coni
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              ABCD, ſecantur plano trianguli, vel circuli FGH, baſi
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              ABC, parallelo; erit componendo, vt AD, ad DF, hoc
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              eſt, vt AC ad FH, propter ſimilitudinem triangulorum,
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              hoc eſt vt AC, ad CL, ita ED, ad DK; & per conuer­
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              ſionem rationis, vt AC, ad AL, ita DE, ad EK: ſed vt
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              DE ad EK, ita eſt pyramis, vel conus ABCD, ad py­
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              ramidem, vel conum ABCK; vt igitur AC, ad AL,
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              ita eſt pyramis, vel conus ABCD, ad pyramidem, vel
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              conum ABCK; ſed vt tres lineæ AL, FM, OQ ſimul
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              ad AC, ita erat fruſtum ABCFGH, ad pyramidem,
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              vel conum ABCD; ex æquali igitur, erit vt tres lineæ
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              AL, FM, OQ, ſimul ad AL, ita fruſtum ABCFGH,
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              ad pyramidem, vel conum ABCK. Rurſus, quoniam
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              tres exceſſus AL, FM, OQ, ſunt deinceps proportio­
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              nales in proportione totidem terminorum AC, FH, NO,
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              erunt vt AL, FM, OQ, ſimul ad AL, ita AC, FH,
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              NO, ſimul ad AC: ſed vt AL, FM, OQ, ſim ul ad
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              AL, ita erat fruſtum ABCFGH, ad pyamidem, vel
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              conum ABCK; vt igitur tres lineæ AC, FH, NO, ſi­
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              mul, ad AC, ita erit fruſtum ABCFGH, ad pyrami­
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              dem, vel conum ABCK. </s>
              <s>Sed vt AC, ad ſui triplam, ita
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              eſt pyramis, vel conus ABCK ad priſma, vel cylindrum,
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              cuius eſt eadem baſis ABC, & eadem altitudo cum py­
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              ramide, vel cono ABCK; ex æquali igitur, erit vt tres
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              lineæ AC, FH, NO, ſimul ad ipſius AC, triplam, ita
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              fruſtum ABCFGH, ad priſma, vel cylindrum, cu­
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              ius baſis ABC, & eadem altitudo pyramidi, vel cono
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              ABCK: ideſt eadem, fruſto ABCFGH. </s>
              <s>Manifeſtum
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              eſt igitur propoſitum. </s>
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