Berghes in regard to the mineral wealth of Zacatécas and the productiveness of its mines. According to the tables of this writer, published in 1834, it appears that from the year
| 1548 to 1810 the mines of this region produced | $588,041,956 |
|---|---|
| 1810 to 1818 " " " | 20,060,363 |
| 1818 to 1825 " " " | 17,912,475 |
| 1825 to 1832 " " " | 30,028,540 |
| $656,043,335 |
| These rates gave an annual mean product, from | |
|---|---|
| 1548 to 1810 " " " of | $2,244,434 |
| 1810 to 1818 " " " " | 2,507,545 |
| 1818 to 1825 " " " " | 2,558,925 |
| 1825 to 1832 " " " " | 4,003,128 |