There is copper in Putula or Rios and in Guadalupe. In these mineral districts we also encounter lead. _Amianto_ (incombustible crystal) also abounds in Niezca and in the vicinity of Monclova, as also nitre in San Blas, jurisdiction of San Buonaventura. In the hills of Gizedo, correspondent to the district of Santa Rosa, are extracted sulphur and copperas. It is difficult to ascertain and to mention all the causes which have led to the decadence of the mineral industry of this state, because the reports which the authorities have remitted do not state it exactly; but there is no doubt that they are two, viz., the want of security occasioned by the frequent incursions of the barbarians, and the little affection which the agricultural people that occupy that state have for mining enterprises; that, as already said, they require recognizances, as well as capital and hands, things which are scarce enough in the vast territory of the frontier state of Coahuila. D. REPORT ON THE MINERAL RICHES OF LOWER CALIFORNIA. The sparse population of this territory, the want of scientific information in its inhabitants, and the difficulties which have existed in the way of keeping up an intercourse with their fellow-citizens of the centre of the republic, are causes weighty enough for explaining the ignorance in which we live concerning the mineral riches of that interesting peninsula. Without doubt, if we are permitted to judge of it from the abundance of the precious metals which California of the North and Sonora contain, and their contiguities, we ought to infer that in the territory of Southern California the designated metals should be found in considerable quantities. The official notices which we possess in respect to Lower California fortify this conjecture. Those exhibited by persons who lack competent instruction upon this point contribute in part to foretell what will be the grade of prosperity which will come in time with the developing of the mineral industry in this territory. Southern California, by its topographical position alone, is called to occupy an important place, not only among the integral parts of the nation, but even among foreign parts of America which are bounded by the Pacific. If its first necessity is attended to, with the augmentation of population commerce will come to give it the consequent movement and animation, and the Mineria will come to complete the circle of its prosperity; so that it is now difficult to perceive the grand importance, commercial and political, which this despised peninsula, which is called Lower California, will yet attain when the transition of time and the sequel of events come to realize these Utopian offspring of a patriotic sentiment; but we will occupy ourselves with the statistical mineral notices of that territory.