What people are saying - Write a review
We haven't found any reviews in the usual places.
Other editions - View all
The Fire Assay of Gold, Silver, and Lead in Ores and Metallurgical Products
Leonard S 1846-1929 Austin
No preview available - 2018
acid antimony argols arsenic Assay Furnace assay-ton assayer balance basic flux beam blende bone-ash borax-glass burner capsule carbonate charge clean coke color copper crucible assay crude borax cupel determine diam dish dissolved enter the slag feather-litharge FeS2 flask flour follows fusible galena gangue glass gold and silver grams grinding plate hammer heat i0 gm i5 gm impurities iron iron sulphide lead assay lead button lead carbonate lead-foil litharge loss melted metal method milligram mixed molten muffle nail-assay nails needed nitre nitric acid ounces oxidizing power particles of gold pearlash pieces placed poured pyrite quantity quiet fusion red heat Reducing Agents reducing power Reducing-flux regular assay removed resultant button roasted salt sample sand scorifier silica silver and gold silver button soda solution spatula sulphate sulphides sulphur surface tellurium temperature test-lead tongs Troy ounces weighing zinc
Page 82 - The solution is allowed to stand in a warm place until the red fumes...