Note 14 — XV
Reading edition
According to the Catalogue, the following ores are found:—Variegated copper ore (cobre gris abigarrado), arsenious copper (c. gris arsenical), vitreous copper (c. vitreo), copper pyrites (pirita de cobre), solid copper (mata cobriza), and black copper (c. negro). The ores of most frequent occurrence have the following composition—A, according to an analyzed specimen in the School of Mines at Madrid; B, according to the analysis of Santos, the mean of several specimens taken from different places:—