The Encyclopedia Americana, Volume 7Grolier, 1994 - Encyclopedias and dictionaries |
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Page 133
Coal Mining and Plant Debris 133 Production Appearance of Kinds of Mines 137 137 Coal Seams 134 Mining Hazards 2. Kinds of Coal 135 and Safety Composition Coal Production of Coal 135 5. Coal Derivatives Analysis and Test- ing of Coals ...
Coal Mining and Plant Debris 133 Production Appearance of Kinds of Mines 137 137 Coal Seams 134 Mining Hazards 2. Kinds of Coal 135 and Safety Composition Coal Production of Coal 135 5. Coal Derivatives Analysis and Test- ing of Coals ...
Page 134
134 THE FORMATION OF COAL Coal is derived from the tissues of plants that flourished several hundred million years ... SWAMPLAND- PLANT DEBRIS WATER SEDIMENTS PEAT WATER SEDIMENTARY ROCKS COAL plants ) were in part retained in the plant ...
134 THE FORMATION OF COAL Coal is derived from the tissues of plants that flourished several hundred million years ... SWAMPLAND- PLANT DEBRIS WATER SEDIMENTS PEAT WATER SEDIMENTARY ROCKS COAL plants ) were in part retained in the plant ...
Page 143
The pilot plant for studying the Hygas process was put in operation in Chicago , Ill . This plant could produce 1.5 million ... In 1973 , it became the first plant in the world to achieve large - scale conversion of coal to SNG .
The pilot plant for studying the Hygas process was put in operation in Chicago , Ill . This plant could produce 1.5 million ... In 1973 , it became the first plant in the world to achieve large - scale conversion of coal to SNG .
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