Note 30 — INTRODUCTORY CHAPTER THE TYPES AND TYPEFOUNDING OF THE FIRST PRINTERS.
Reading edition
A calculation given in the Magazin Encyclopédique of 1806, i, 299, shows that from such matrices 120 to 150 letters can be cast before they are rendered useless, and from 50 to 60 letters before any marked deterioration is apparent in the fine strokes of the types.