A Textbook on Mining Engineering, Τόμος 5

ammonia amount antimony arsenic assay assayer bead beaker becomes beds blowpipe blue boiling borax bullion button c. c. of water carbonate carbonic acid characteristic charcoal charge chemical chloride cleavage closed tube coal coat cobalt color colorless compounds contains cooling copper crucible crystals cupel deposits dike dilute dissolve earth elements filter fissures flame flux formation furnace fused gives glass gold and silver gram green heat hence hydrate hydrochloric acid igneous inches insoluble iron lava lead lime limestone litharge luster manganese mass material matrass metallic metamorphic metamorphic rocks minerals muffle nitric acid occurs octahedron ounces oxide permanganate phosphorus platinum portion potassium precipitate quartz reaction reduced result riffles rocks sample sandstone scorifier shown in Fig silica soda soluble solution sometimes specific gravity strata Streak substance sulphate sulphide sulphuric acid surface tellurium temperature tion titration usually veins volatile washed weight yellow zinc