Cannel coal
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A kind of mineral coal of a black color, sufficiently hard andsolid to be cut and polished. It burns readily, with a clear, yellowflame, and on this account has been used as a substitute for candles.
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A compact, tough variety of coal, originating from organic spore residues, that is noncaking, contains a high percentage of volatile matter, ignites easily, and burns with a luminous smoky flame.
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