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Skey proved that the reduction of the metal was due to the direct action of the sulphide, and showed that each grain of iron pyrites, when thoroughly oxidised, will reduce 12 1/4 grains of gold from its solution as chloride.
The copper should now be in the form of a precipitate at the bottom of the beaker or adhering loosely to the aluminium sheet. Remove the sheet, wash it carefully with hydrogen sulphide water and place it in a small beaker.
Below the zone of surface changes the ore of a copper vein is often a double sulphide of iron and copper called CHALCOPYRITE, a mineral softer than pyrite it can easily be scratched with a knife and deeper yellow in color.
The herein described process of manufacturing phosphorescent materials, which consists in heating sea shells red-hot, treating them while heated with a bath of brine, then, after removal from the bath, mixing sulphur and phosphide and sulphide of calcium therewith, and finally subjecting the mixture to a white heat, substantially as and for the purpose described.
It is a new method of agriculture, in which the young of our species are used for manure. The babies are collected each day and put into large vats containing equal parts of hydrobicarbonate of oxygenated sulphide, and oxygenated sulphide of hydrobicarbonate, where they are left to soak overnight.
There were fourteen million tons of these residues on the Broken Hills dumps and from them he derived large returns for the company that he had organized to purchase the property. He also introduced new metallurgical processes for the profitable handling of the low-grade sulphide ores that constituted most of the mineral body of the mines.
=Sewer Gas.= Cesspool emanations usually consist of a mixture of sulphuretted hydrogen, sulphide of ammonium, and nitrogen; but sometimes it is only deoxidized air with an excess of carbonic acid gas. Symptoms.
Success was assured. The last step, the production of thiodiglycol, occurred in the causticising house, to which no substantial alterations or additions appear to have been made for the purpose. As sodium sulphide is used in large quantities as a raw material in the dye industry, and was already produced within the I.G., no difficulty was presented in connection with its supply.
If the leaching of the Leadville porphyry has not resulted in the formation of alkaline sulphide solutions, and the ore has come from the porphyry in the condition of carbonate of lead, chloride of silver, etc., then the nature of the deposition was quite different from that of the similar ones of Tybo, Eureka, Bingham, etc., which are plainly gossans, and indeed is without precedent.
If made by the ammonia process it may contain also sodium chloride, sulphate, and hydroxide; when made by the Le Blanc process it may contain sodium sulphide, silicate, and aluminate, and other impurities.
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