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Updated: May 20, 2025
Then, in the late fifties, he joined a mad stampede to the Frazer River gold-fields in British Columbia, still wild over its first knowledge of silver sulphurets, he was drawn back by the wonder-tales of the Comstock lode. Joining the bedraggled caravan over the Carson trail, he continued his course of bitter hardship in the Washoe Valley.
Thus, for example, M. Fournet, in his description of some mines in Auvergne worked under his superintendence, observes that the granite of that country was first penetrated by veins of granite, and then dislocated, so that open rents crossed both the granite and the granitic veins. Into such openings, quartz, accompanied by sulphurets of iron and arsenical pyrites, was introduced.
"Well, I'm going over to the other side of the range day after t'morrow after some ponies of mine, an' I'm going to have a look around. You say you've been a miner?" "Yes, yes." "If you're going over that way, you might come along and see if we can't find a contact, or copper sulphurets, or something. Even if we don't find color we may find silver-bearing galena."
The decomposition of the earthy and alkaline sulphates, and their transition to the state of sulphurets, may no doubt favour this disengagement in many littoral and marine plants; for instance, in the fuci: but I am rather inclined to think that the rhizophora, the avicennia, and the conocarpus, augment the insalubrity of the air by the animal matter which they contain conjointly with tannin.
In the next case the series of Oxides begins. Herein are the oxides and hydrous oxides of manganese. Having examined the sulphurets and oxides, the visitor should cross to the northern suite of tables marked from 48 to 54. Here are arranged a series of the Carbonates, or combinations of carbonic acid with earths, metallic oxides or alkalis.
They are, in short, loamy or clay soils, and must have been sufficiently above water to admit of drainage. The absence of sulphurets, and the occurrence of carbonate of iron in connection with them, prove that, when they existed as soils, rain-water, and not sea-water, percolated them. The coal and the fossil forests present many evidences of subaërial conditions.
The sixth case is covered with Sulphurets, chiefly of iron, these being commonly known as iron pyrites. These specimens of the commonest of metallic ores are from various parts of the world. Upon this table also are deposited Lord Greenock's sulphuret of cadmium, commonly called greenockite; and sulphurets of nickel.
The pulverized sulphurets are decomposed by exposure to the air, and after the tailings have been preserved for a time, they may pay better at the second amalgamation than at the first. A mixture of common salt assists the decomposition of the pyrites. Chief Quartz-Mills. The most productive quartz-mill in the state is the Benton mill, on Fremont's Ranch, in Mariposa county.
In fact it is a dead level to Fort Yuma, and, in consequence, no grading is necessary. There is scarcity of water, but the soil in general is excellent and grass abounds all along the line, while the mountains teem with minerals of the richest description. The oxides and the sulphurets of copper are the most beautiful and richest in the world. Silver undoubtedly exists of equal richness.
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