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Updated: May 29, 2025
It is of two kinds: the one with a gray, the other with a brown base the latter much more common than the former; the one shining with a whitish, the other, with a yellowish lustre. The one is galena, a sulphuret of lead; the other, pyrites, a sulphuret of iron. These pyrites are very extensively diffused, and are said to be worth about L.2 a ton.
So I want you to go round the works, and observe for yourself how Life is thrown gayly away, in a moment, by needless accident, and painfully gnawed away by steel-dust, stone grit, sulphuret of lead, etc.; and then cudgel your brain for remedies." "Sir," said Henry, "I am afraid I shall not earn my money. My heart is not in the job." "Revenge is what you would like to be at, not Philanthropy eh?"
There are large deposits of it in the mines of Cornwall, and it is just possible," here the professor measured his words as if speaking of something that he wouldn't promise, "that the Cassiterides of the Phoenicians contained deposits of the same sulphuret. Indeed, I defy anyone," he continued, for he was piqued in his scientific pride, "to distinguish it from gold without a laboratory-test.
Thus when the salts of lead or of mercury are applied, they enter into combination with the sulphur, and a black sulphuret of the metal is formed. A common formula for a paste to dye the hair, is a mixture of litharge, slacked lime, and bicarbonate of potash. Different shades may be given by altering the proportions of these articles.
Metals are not generally found in the ground in a pure state. For the most part they are combined with oxygen or sulphur. Such was the case with the two specimens which Cyrus Harding had brought back, one of magnetic iron, not carbonated, the other a pyrite, also called sulphuret of iron.
The sulphuret of calcium will also kill them, so will the more dangerous white precipitate, or even a strong solution of carbolic acid, which must be used sparingly, however. The lice are hatched from nits, which we find clinging in rows, and very tenaciously too, to the hairs. The insects themselves are more difficult to find, but they are on puppies sometimes in thousands.
"If ever you feel violently impelled to drown yourself, take pulsatilla; but if you feel a preference towards blowing out your brains, accompanied with weight in the limbs, loss of appetite, dry cough, and bad corns, sulphuret of antimony. Don't forget." Though poor Mr.
Well, then, a hundred parts of ore and a hundred parts of sulphuret of lead, with about fifty parts of metallic lead, being all mingled together in a crucible, the sulphur of the sulphuret takes the iron, the copper, and some of the other metals and impurities, and combines with them to form a slag; and as it goes on boiling and oxidising, it carries off the iron, and so a great cleansing takes place.
Under its capacious roof there were tons upon tons of every variety of ore native and foreign, blue and red, green and yellow, and all intermediate colours indiscriminately piled around. There was the beautiful green malachite from Australia, the gray sulphuret from Algiers, the phosphate from Chili, and the hydrous-carbonate from Spain.
The last product the regulus is again calcined, with the view of bringing the iron to the state of an oxide. It is again melted, slagged, and run into pigs. In this last operation, the whole iron is driven out in the slag, and the remainder 'white metal, as it is called is almost a pure sulphuret of copper.
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