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

In this volume, besides the critical prolegomena, is contained:
1. The book of the Elements that is called XIV, that is, the discourse of Hypsicles of Alexandria on the dodecahedron and icosahedron. In amending this, besides the codices P, B, and V, which I myself collated, I have used these new aids:
V — codex Vaticanus 1038, largest format, parchment, 13th century; in the beginning, the mark of the Parisian library is impressed in red color; for this codex also, like Vat. 190, was transmitted to Paris by Peyrard. It contains a) Elements II, 8 — XV, folios 1—103r (with some scholia); quaternion α has fallen out, on folio 1 in the lower left margin the second hand placed β.*) — b) Optics

*) The quaternions γ—ι have their numbers both in the upper margin by the first hand and in the lower by the second; ια—μη only in the lower by the second hand (ιη ends on folio 383; folio 384 shows no number; ιγ, κα, λδ have only VI folios, but λγ has X, ιζ only IV; Heron ends with them). On folio 233r in the lower margin is ιβ, corrected to ιγ by the first hand, and so on (on folio 376 is ια); these numbers are counted from folio 137 (Ptolemy). Furthermore, on folio 352, where the Apotelesmata of Ptolemy begin, there is α by the first hand in the upper margin.