This and other lines are all explained in the Intro. to Vol. I. pp. 15-19. Prop. LII. प्रथममध्ययो गरेखा - The first bimedial line. Prop. LXX. अन्तररेखा A residual line. Prop. LXXIII. न्यूनरेखा = A less line. प्रथमान्तररेखा = The first residual line. Prop. LXXXIX. प्रथममध्यान्तररेखा = The first medial residual line. BOOK XI. Definitions. cylinder. पिण्डः = Depth. घनक्षेत्र = A solid body. iA cone or a pyramid. केदितघनक्षेत्रमू-A prism, गोलक्षेत्रमू - A sphere. सूचीफलक शत्रुघनक्षेत्रम् = A pyramid. समतलमस्तकपरिथिरूपं शङ्कुचनक्षेत्रम् 01 समतलमस्तकशङ्कुक्षेत्रम्-A Prop. XIX. 14 Third Definitions (p. 110). A solid angle. संपात रेखा-Common section. Prop. XXIV. Prop. XL. Prop. III. CITEuaHẬ1-A parallelepiped. घनहस्तक्षेत्रम् – A parallelepiped. BOOK XII. A pyramid having a triangle as its base. Every pyramid having a triangle as its base may be divided
