Ancient Greek
Section 49
Scholia in Euclidem, Scholia in opticorum recensionem Theonis (scholia vetera) 49
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49. Ὃν τρόπον ἐπὶ τοῦ κγʹ καὶ κδ΄ ἔδειξεν, οὕτως καὶ ἐπὶ τῶν δύο τούτων τοῦ κηʹ καὶ κθʹ, πλὴν ἐκεῖ μὲν ἐπὶ σφαίρας, ὧδε δὲ ἐπὶ κυλίνδρου. Ad prop. XXX.