ABSTRACT
In addition, the slight discrepancy in the manuscripts about the name of the treatise indicates some uncertainty. While the title is generally given as
' ApiOTO^EVOU appoviKcov O T O I X E I C O V a (3' y , there are some variations on the specific title of the first book, creating some doubt as to whether it is the first book of the Elements, or a book preliminary to the Elements.1 This latter possibility makes the second book of our treatise the first book of the Elements. It is supported by the evidence of Porphyry who, in his Commentary on Ptolemys Harmonics, appears to grant the title of Principles (irepi apxcov) to Book I of our treatise,2 and Harmonic Elements (apiJOVlKCOV GTOIXEICOV) to the second book.3
