116,015 marks, 1 oz., and 4
eighths of silver, of the ley of eleven _dineros_, and of 2351 marks, 5
oz., 2 eighths of gold, with ley of twenty-two carats. This appears
from the reports of the mint of the capital of that state.

C.

REPORT ON THE MINERAL RICHES OF COAHUILA.

This state, one of the least populous, and exposed, like all the
frontier states of the north, to the incessant incursions of the
barbarous tribes, offers at present very little interest to those
speculations which engender the exercise of mineral industry--that
which, besides experience and capital, requires for its development an
abundance of hands and entire security. While the publication of the
mineral statistics of the nation not only brings the idea of
manifesting the present condition of this branch of industry among us,
but also that of propagating its exercise as one of the principal
elements of riches among the Mexicans, it is necessary to speak of the
state in which the Mineria is in Coahuila, and of hopes which it makes
to spring up for the future. There are twelve mines actually
_amparadas_, or in labor, in the four _minerals_ already mentioned:
their names are unknown to us, and it is only known that their monthly
products amount to 200 marks [of 8 ounces] of silver and 150 loads of
_greta_ [litharge]. The number of operatives employed in all these
amount to 193, and the day laborers receive four _reals_ [half a
dollar] a day.

There is no exact notice of the number of mineral districts and single
mines abandoned in the State of Coahuila; but the number is
considerable, according to the information furnished from 1843 by the
deputation of Santa Rosa. Among those deserving a particular mention is
that of the Sierra de Timulco and that of Potrerillos, by the good ley
of the metals of the mines of the first, and by the uniformity of the
veins and not unappreciable richness of the second. These veins run
generally from northwest to southeast, and in the course they
encounter, scattered about, silver-bearing galena [sulphuret of lead],
lead, copper, with sulphuret of zinc. The amount of the consumptions of
the mines that are worked is also unknown; but it is known that the
gunpowder costs the operators $9 an aroba [of 25 pounds], of lead, $12
a carga of 300 pounds; that of _greta_, $6; copper, of superior
quality, $16 the hundred weight; the carga of coal, six _reals_ [three
fourths of a dollar], and wood, one _real_ a mule-load. The