The Encyclopedia Americana, Volume 7Grolier Incorporated, 1996 - Encyclopedias and dictionaries |
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Page 133
COAL BUREAU OF MINES AND JOY MANUFACTURING COMPANY CONTENTS Page Section Page Section 1. How Coal Was 3. World Coal Formed 133 Resources 136 Accumulation of 4. Coal Mining and Plant Debris 133 Production Appearance of Kinds of Mines 137 ...
COAL BUREAU OF MINES AND JOY MANUFACTURING COMPANY CONTENTS Page Section Page Section 1. How Coal Was 3. World Coal Formed 133 Resources 136 Accumulation of 4. Coal Mining and Plant Debris 133 Production Appearance of Kinds of Mines 137 ...
Page 137
RECOVERABLE COAL RESOURCES Soviet Union ( Mapped and explored ) Percent of world total In billion metric tons 2,950 68.5 % North America 780 18.1 United States 710 16.5 Europe 280 Asia 225 Africa 35 0.8 25 10 0.6 0.2 Oceania Latin ...
RECOVERABLE COAL RESOURCES Soviet Union ( Mapped and explored ) Percent of world total In billion metric tons 2,950 68.5 % North America 780 18.1 United States 710 16.5 Europe 280 Asia 225 Africa 35 0.8 25 10 0.6 0.2 Oceania Latin ...
Page 144
144 UNDERGROUND GASIFICATION OF COAL The United States , Britain , and the Soviet Union have made tests to gasify coal under- ground to obtain a low - Btu gas . In this ap- proach , input- and output - bore holes are drilled down to a ...
144 UNDERGROUND GASIFICATION OF COAL The United States , Britain , and the Soviet Union have made tests to gasify coal under- ground to obtain a low - Btu gas . In this ap- proach , input- and output - bore holes are drilled down to a ...
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