silver, the value of which was $131,267,354;—the mean yield of tax being $198,889, and of the silver, 1,591,119, in marks, which, estimated at the rate of eight dollars and a quarter, per mark, amounts to $13,126,735 annually.
Comparing the first and second periods of five years, we find a difference in the tax in favor of the latter, of $113,130, on 905,042 marks of silver; showing that in the latter period $7,466,596 more were extracted from the Mexican mines than during the former.
If we adopt the decimal basis of calculation the returns show, approximately, the following results for relative productiveness:
| In Zacatecas, | 33 2 / 32 | per ct. |
|---|---|---|
| Guanajuato, | 21 12 / 32 | " " |
| San Luis Potosi, | 7 22 / 32 | " " |
| Pachuca, | 6 24 / 32 | " " |
| Guadalajara, | 5 4 / 32 | " " |
| Mexico, | 4 26 / 32 | " " |
| Durango, | 4 18 / 32 | " " |
| Guadalupe y Calvo, | 3 24 / 32 | " " |
| Chihuahua y Jesus Maria, | 4 18 / 32 | " " |
| In Rosario, Cosala and Mazatlan, | 2 26 / 32 | per ct. |
| Sombrerete, | 2 22 / 32 | " " |
| Parral, | 1 6 / 32 | " " |
| Zimapan, | 28 / 32 | " " |
| Alamos, | 27 / 32 | " " |
| Hermosillo, | 26 / 32 | " " |
| Oajaca, | 2 / 32 | " " |
| Tasco, | 1 / 32 | " " |