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air drying air-dried allowed amount analysis ash and sulphur ball mill bottle California cent changes coal boiler-test sample coarse sample column compared correction crushed decanted determinations Division dried effect entire sample experiments F. W. Clarke fineness fixed carbon fuel-testing plant Gain in weight Geological Survey given gives grade gram grinding Heavier than 1.65 humidity Illinois Illinois coal inch and finer inch Lighter increase Indiana indicate laboratory Lighter than 1.35 lignite Louis mechanical loss Mexico minutes modified method moisture content official method Ohio original sample oxidation Pennsylvania percentage portion preliminary heating present regular Remainder Report results obtained rocks Sample of coal separated shown solution specific gravity standing taken tests Texas tion Total loss ture United States Geological Unwashed coal boiler-test volatile matter washing watch glass West Virginia Wyoming
Seite 36 - Place 1 gram of pure bitumen in a " platinum crucible weighing 20 or 30 grams and having a tightly fitting cover. Heat over the full flame of a Bunsen burner for seven minutes. The crucible should be supported on a platinum triangle with the bottom 6 to 8 cm. above the top of the burner. The flame should be fully 20 cm.
Seite 36 - The flame should be fully 20 cm. high when burning free, and the determination should be made in a place free from draughts. The upper surface of the cover should burn clear, but the under surface should remain covered with carbon. To find Volatile Combustible Matter, subtract the per cent.
Seite 37 - Society, but the results of their experiments are negative. (2) A different breaking down of the hydrocarbon compounds when expelled under different conditions and in the presence of variable amounts of moisture. The results of Mr. NM...