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This country is full of most valuable minerals, and the people know as much about them as a pudding does of the plums contained in it. Observe this shelf, Sir, there are specimens of seven different kinds of copper on it; and on this one, fragments of four kinds of lead. In the argentiferous galena is a very considerable proportion of silver.
The Baron de Nucingen felt a lively regard for the d'Aldrigger family; he was prepared, if things went amiss, to cover the Baroness' account with his best securities, to wit, some shares in the argentiferous lead-mines, but the application must come from the lady. "'Poor Nucingen! said the Baroness. 'What can have become of him? "'He is in Belgium.
In the Sierra near at hand are the famous silver mines known as Cerro del Potosi, which are so rich in the deposit of argentiferous ore that it is named after the mines of Potosi in Peru. There are valuable salt mines existing in this State of San Luis Potosi, at Peñon Blanco. The city has always been noted as a military centre, and a large number of the regular army are stationed here.
RICHARD S. MCCULLOCH, Professor of Natural Philosophy at Princeton College, and some time since melter and refiner of the United States Mint, has addressed a letter to the Secretary of the Treasury, in which he states that he has discovered a new, quick, and economical method of refining argentiferous and other gold bullion, whereby the work may be done in one-half the present time, and a large saving effected in interest upon the amount refined.
Those who were miners have become cultivators. The argentiferous mines of Santa Anna, Manta, Santo Christo de las Laxas, Pamplona, Sapo and La Vega de Sapia afford great hope. The facility of the communications between the coast of Columbia and that of Europe imparts the same interest to the copper-mines of Venezuela and New Grenada.
Free gold in paillettes was noticed by the Expedition in the micaceous schists veining the quartz, and in the chalcedony which parts the granite from the gneiss. The argentiferous Negro quartz everywhere abounds, and near the ruins of Bada lie strews of spalled "Maru," each fragment showing its little block of pure lead.
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