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The existence even of trachyte has not yet been verified in the Sierra Nevada de Merida which links the Andes and the littoral chain of Venezuela. It would seem as if volcanic fire, after the formation of primitive rocks, could not pierce into eastern America. Possibly the scarcity of argentiferous veins observed in those countries may be owing to the absence of more recent volcanic phenomena.
It will be seen that the subject of eutexia embraces many points of practical importance and of theoretical interest. Thus it has been shown by Dr. Guthrie that the desilverizing of lead in Pattinson's process is but a case of eutexia, the separation of lead on cooling a bath of argentiferous lead poor in silver being analogous to the separation of ice from a salt solution. Dr.
"This very night," answered Lachares. "We sup at her country-seat. What bring you?" "Tell her that I have argentiferous lead from New Carthage, and wool from Bætica. Excellent voyage!" The two youths tugged at their horses' reins. "Ah! Wait a moment," added Polyanthus. "Tell her that I have not forgotten her instructions. I am bringing what you so greatly desire, the dancing girls from Gades."
Arimuicaipi, an Indian of the nation of the Ipurucotos, went down the Rio Carony, and by his false narrations inflamed the imagination of the Spanish colonists. He showed them in the southern sky the Clouds of Magellan, the whitish light of which he said was the reflection of the argentiferous rocks situate in the middle of the Laguna Parima.
Sampayo, pleasantly. 'Was that Argentiferous Copper Company in sixty-four yours or his? 'There were a good many people concerned in it. 'No doubt; it takes a good many people to work that kind of thing, but I fancy you and Montesma were about the only two who came out of it pleasantly. And he and you did a little in the shipping line, didn't you African produce? However, that's an old song.
Rich argentiferous lead is found in the clay-slate of the Uspallata range; and I saw an old silver-mine in a hill of syenite at the foot of the Bell of Quillota: I was also assured that silver has been found in the andesitic and porphyritic region between the town of Copiapo and the Pacific.
Charles Grandet implored Delphine's lover to use his interest to secure shares for him in exchange for his cash. And altogether Rastignac played the part of Law for ten days; he had the prettiest duchesses in France praying to him to allot shares to them, and to-day the young man very likely has an income of forty thousand livres, derived in the first instance from the argentiferous lead-mines."
Determined that the Khedive should have something for his money, Burton and his company had, to use Mrs. Burton's expression, "returned triumphantly," with twenty-five tons of minerals and numerous objects of archaeological interest. The yield of the argentiferous and cupriferous ores, proved, alas! to be but poor. They went in search of gold, and found graffiti!
The ore contained in these bedded veins exhibits some variety of composition, but where unaffected by atmospheric action consists of argentiferous galena, iron pyrites carrying gold, or the sulphides of zinc and copper containing silver or gold or both. The ore of the Walker and Webster and the Piñon is chiefly lead-carbonate and galena, often stained with copper-carbonate.
Gold is always found as a metal, never as an ore, and the separation from the accompanying vein-stone with which it is mixed mechanically, is much more simple and easy than the reduction of the argentiferous ores in which the silver is chemically combined with base substances, for which it has a strong affinity.
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