Note 375 — XXVI

I know by experience that the ordinary metal used for types can be cast in a matrix of lead to the number of 125 or 150 types before the matrix will be destroyed. After 50 or 60 castings, there will be an alteration in the mould; the finer lines will disappear and ruder lines be presented. This will account for the differences that the same letters present on every page. Magazin Encyclop. de Millin, 1806, vol. I, p. 74, as quoted by Bernard, vol. I, p. 299.