bituminous coal, cannel coal, semi-anthracite and anthracite ; in a word, all the varieties of coal known to scientific and practical men. Vegetable fiber is composed of carbon, 36 parts ...

it was observed that appreciable quantities of some bituminous coals were soluble (or dispersible) in alcoholic potash. A Northumberland coal containing 82·6 per cent of carbon and 5.1 per cent ...

Arch Resources is an American metallurgical and thermal coal mining company. The company mines, processes and sells bituminous and semi-bituminous coal with a low sulfur content. The company is the ...

By distilling bituminous coal in retorts to obtain gas for illumination, or by burning it in kilns or pits, the residue left behind is called coke, which is simply coal charcoal, and is nearly ...