The book The a B C of Mining a Handbook for Prospectors was written by author Charles a Bramble Here you can read free online of The a B C of Mining a Handbook for Prospectors book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The a B C of Mining a Handbook for Prospectors a good or bad book?
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Should the deposits of bauxite give out, the manu- facturers of aluminum would probably fall back on cryolite. At Tvigtuk, on the west coast of Greenland, it exists, as a very heavy vein, in gneiss. It is semi- transparent, and snow-white. Impurities may stain it yellow or red or even black. Its specific gravity is 2. 95, and its hardness 2. 5 to 3. It is fusible in the flame of a candle, and yields hydrofluoric acid if treated with sulphuric acid. It is still used for making soda and aluminum ...salts, and an imitation porcelain. It is also in general use as a flux. Amber. This is a fossil resin, or gum, and may often be found in lignite beds. Recent discoveries have been made on the coast of British Columbia that are ex- pected to supply the world. All pipe-smokers know it. Antimony. The commercial ore of this metal is the sulphide known as stibnite, or gray antimony. Its composition when pure is 72 per cent, antimony and 28 per cent, sulphur. Hardness is 2; gravity, 4. 5; luster, metallic; opaque; gray; cleavage, perfect.
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