What Is anthracite coal;Why It is Most Useful Coal

Coals which contain a large amount of hydrocarbon or bituminous matter, generally give off thick clouds of
smoke when burning. These kinds are used for burning in the house fire grates and for the manufacture of coal-
gas. Anthracite is a non-bituminous coal, for it contains hardly any hydrocarbon matter, and consequently gives
off hardly any smoke when it is burnt. I t consists almost altogether of carbon.

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