Complete Works of Euclid, Vol. 7 (Optics and Catoptrics)

V. In the Catoptrica I have used these (I collated them myself):
V == Vatican codex Gr. 204 ff. 135 — 144^r, concerning which see above; it was corrected at the beginning by a most recent hand.
v == Vatican codex Gr. 191; see above.
M == Marcian codex 303; see above.
m == Marcian codex 301, paper, 15th century.

VI. I have taken the Scholia of the Catoptrica from these:
V == Vatican codex Gr. 204.
V^1 == a recent hand of the same; see above.
p == Paris codex Gr. 2107; see above.
q == Paris codex Gr. 2342; see above.
q^1 == the same hand of the same in red ink.
p. 14, 2: for ἴση, write ἴσα.

Written at Copenhagen in the month of November, 1894.

J. L. Heiberg.