Note 1346 — PERSIUS.

Bicolor. The outer side of the parchment on which the hair has been is always of a much yellower color than the inner side of the skin; hence "croceæ membrana tabellæ," Juv., vii., 23; though some think that the color was produced by the oil of citron or cedar. (Plin., xiii., 5. Cf. ad Sat. i., 43.) Leaves and the bark of trees were first used for writing on; hence folia and liber: occasionally linen, or plates of metal or stone; then paper was manufactured from the Cyperus papyrus, or Egyptian flag. Plin., xii., 23; xiii., 11. When the Ptolemies stopped the exportation of paper from Egypt, to prevent the library of Eumenes, king of Pergamus, from rivaling that of Alexandria, parchment (Pergamenum) was invented to serve as a substitute. Plin., x., 11, 21. Hieron., Ep. vii., 2. Hor., Sat., II., iii., 2. The manufacturer of it was termed Membranarius. The parchment was rendered smooth by rubbing with pumice, and flattened with lead, and was capable of being made so thin, that we read that the whole Iliad written on parchment was inclosed within a walnut-shell. Plin., VII., xxi., 21. Quintilian says, "that wax tablets were best suited for writing, as erasures could be so readily made; but that for persons of weak sight parchment was much better; but that the rapid flow of thought was checked by the constant necessity for dipping the pen in the ink." Quint., x., 3. Cf. Catull., xxii., 6. Tibull., III., i., 9. They used reeds (calamus, fistula, arundo) for writing on this, as is done to the present day in the East. The best came from Egypt. "Dat chartis habiles calamos Memphitica tellus." Mart., xiv., Ep. 38. Hor., A. P., 447.