One of the most generally adopted methods of enrichment now is by means of carburetted water gas mixed with poor coal gas.
16 a the gas industry, caused the attention of inventors to be turned to the enrichment of coal gas.
The inspiration of early belief has disappeared; the ruling motive of the mollahs (priests) is the thirst for personal enrichment, and the people no longer follow the khojas or theologians.
It has elaborate reliefs in repousse work, cast canopies and minute statuettes, with the further enrichment of translucent coloured enamels.
The mining product next in value to coal in 1908 was copper, taken chiefly in Carbon county in a zone of brecciated quartzite underlying schist, the original ore being chalcopyrite, with possibly some pyrite, a secondary enrichment, which has produced important bodies of chalcocite in the upper workings, but these are replaced by chalcopyrite at greater depth.