Complete Extant Works of Hero of Alexandria, Vol. 3

A stemmatic or structural diagram showing the relationship between folios 107, 108, c, d, 109, 110, e, and f. Lines connect 107 to e, 108 to 110, c to 109, and d is shown as a separate small bracketed pair.

From what I have said, it appears that the Constantinopolitan book was once larger by six leaves. However, the loss of those membranes should not be called a tragedy, since none of them had been written upon. To understand this more easily, it is worth knowing what is inscribed on each individual leaf.

The Constantinopolitan codex therefore consists of two parts, the first of which (fols. 3–66) presents a collection mixed from various mathematical commentaries, while the second (fols. 67–110) contains the Principles of Measurement composed by Hero. Although these two parts were written by the same scribe and are not dissimilar in subject matter, it is perhaps possible to doubt whether they were joined in one volume from the beginning or were only bound together in a later age, since the order of the quaternions of the first part is indicated by numerical notes, while that of the second is not. I consider the former opinion more probable, as suggested both by the high degree of similarity of the parchment in both parts and by the identical number of thirty-one ruled lines impressed upon all of them. The contents are as follows:

fol. 3r–17v Geometry of Euclid (hand 2, written over an erasure).
fol. 17v–19r A collection of problems, to which the name Diophantus (Diophantus by hand 2) is prefixed.
fol. 19r–23r Method of Polygons.
fol. 23v–26v General Method for Polygons.
fol. 27r–42r Introductions of Hero and On Linear Measurements.
fol. 42r–53v Measurement of a four-arched or four-vaulted structure on a square base.
fol. 54r–54v Measurement of grain contained in storage.
fol. 55r–61r Measurement of Pyramids.