The Extant Greek Works of Apollonius of Perga, Vol. II

was copied from Urbin. 73 is established by these compared places:

II p. 174, 23 ἐπὶ πασῶν on all] ἐπὶ πλέον on more Urbin., mg. m. 2 "for. ἐπὶ πάντων on all", and thus Halley, not understanding the error;

II p. 202, 23 μένον remaining] Urbin., mg. m. 2 "for. here are to be added as below πρὸς τῆς κορυφῆς τῆς ἐπιφανείας towards the vertex of the surface"; μένον πρὸς τῇ κορυφῇ τῆς ἐπιφανείας Halley;

II p. 274, 10 νδ' 54] Urbin., νγ' 53 m. 2; and thus Command., Halley;

II p. 288, 3 νδ' καὶ νε' 54 and 55] Urbin., νγ' 53 m. 2, Comm., Halley;

II p. 288, 4 νς' καὶ νζ' καὶ νη' 56 and 57 and 58] Urbin., νδ' 54 m. 2, Comm., Halley;

II p. 288, 5 νθ' 59] Urbin., νε' 55 m. 2, Comm., Halley;

II p. 288, 6 ξ' 60] Urbin., νς' 56 m. 2, Comm., Halley;

II p. 326, 13 ΗΘ καὶ HΘ and] ἡ \varthetaκ 20 Urbin., $Θ H$ m. 2, Halley.

I was writing in Copenhagen in the month of September 1892.

I. L. Heiberg.