Complete Works of Euclid, Vol. 6 (Optics, Catoptrics, etc.)

IV p. 95 the figure in XI, 31 is the same as ours, except that P is on an erasure and ↥ is placed for ὄ*) (q has this).
Vol. IV app. 1, 6 is also added in V for a scholion at the end of book XII by hand V^a. Concerning IV app. 1, 7 see below p. 657 note.

I p. 42 coroll. 2 is read twice in V, once by hand 1 (not hand 2) as I provided in the notes, except that at the beginning it adds πόρισμα and at the end has ποιήσουσι, in the second place it is by hand 2 as in F. The corollary on p. 43 note is by hand 2 (not hand 1).

IV p. 172, 10 καί — 12 πυραμίδα] also in the margin by hand 1 of V, but πάλιν instead of ἄρα and Θ in line 11 is from a correction**).

IV p. 176, 11 margin: "γρ. κἂν ἕτερόν τι σχῆμα ἔχῃ ἡ βάσις τοῦ πρίσματος" q.

IV p. 228, 6 the same πόρισμα which is in P is also in the margin of V by hand 1.

IV p. 256, 14 ὁ Ξ O Π — 17 μέν] also in the margin of V^a (πενταπλάσιος corrected from τετράπλ., ἀλλ' instead of ἀλλά).

IV p. 296, 22 πάλιν — p. 298, 1 EK] also in the margin of V^b.

III p. 82, 16 "ση. ὅτι ἡ ἐκ ἐνταῦθα ἀντὶ τῆς υπο κεῖται" in the margin by hand 2 of B.

Regarding III, 24 in the margin of P by a more recent hand: "ἐν ἄλλοις οὕτως εὗρον· τὸ δὲ αεβ τμῆμα ἐπὶ τὸ γζδ μὴ ἐφαρμόσει, ἀλλὰ παραλλάξει ὡς τὸ γηδ, κύκλος δὲ κύκλον οὐ τέμνει κατὰ πλείονα σημεῖα ἢ δύο. ἀλλὰ καὶ τέμνει ὁ γηδ τὸν γζδ κατὰ πλείονα σημεῖα ἢ δύο τὰ γ, η, δ· ὅπερ ἐστὶν ἀδύνατον." The addition after V, 4 (II p. 16, 19) in P is not by a more recent hand, but was written by hand 1 as a scholion. Regarding III p. 338, 17 and 340, 12, app. nos. 24 and 25 are wrongly cited for nos. 25 and 26. The rest, which I have corrected in the flow of the work itself, I shall not repeat here. That accents and breathings

*) This letter is preserved only in P as ὄ, i.e., ου, π.
**) Regarding the collations of the other codices, I have doubts much less frequently.