The Assayer's Guide; Or, Practical Directions to Assayers, Miners and Smelters, for the Tests and Assays, by Heat and by Wet Processes, of the Ores of All the Principal Metals, of Gold and Silver Coins and Alloys, and of Coal, &c: By Oscar M. Lieber ...H.C. Baird & Company, 1899 - 283 стор. |
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added alkalies alloy ammonium amount of silver antimony argol arsenic ascertain assay assay-sample assayer BAIRD & CO.'S black flux boiling borax carbon cent charcoal charge chloride cible coal color common salt containing cool copper cover crucible cubic centimeters cupelled cupric oxide decanted decomposed dilute dissolved dried earthy Engineer engravings evaporate filter flask furnace galena glass gold grains grammes heat HENRY CAREY Hessian crucible hydrochloric acid Illustrated inches iron wire latter lead buttons lead oxide lime litharge melting mercury metallic lead method of assaying millimeters minutes mixed mixture muffle nitric acid particles piece placed Plate porcelain portion potash potassium cyanide poured powdered Practical precipitated present pulverized pyrites quantity quartz quicksilver reducing agents residue result retort roasted saltpetre scorifiers silica slag soda solu specific gravity sulphate of lead sulphides sulphuretted hydrogen sulphuric acid tain temperature tion Treatise tube washed weight zinc
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