dimidium lateris recti, describatur circulus HKk , & ad corporis ascendentis vel descendentis loca duo quævis G , C , erigantur perpendicula GI , CD occurrentia Conicæ Sectioni vel circulo in I ac D . Dein junctis SI , SD , fiant segmentis SEIS , SEDS Sectores HSK , HSk æquales, & per Theorema XI. corpus G describet spatium GC eodem tempore quo corpus K describere potest arcum Kk . Q. E. F.
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SECT. VII.
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