Cannel coal : A kind of mineral coal of a black color, sufficiently hard and solid to be cut and polished. It burns readily, with a clear, yellow flame, and on this account has been used as a substitute for candles.

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Taxonomy
Cannel coal, coal, free encyclopedia, hydrogen, gas, fuel, coal gas, little ash, Encyclopædia Britannica, search, candle, burns, bright light, leaves, inorganic materials, excess, oxygen, shallow depth.

Defination from the web:
Cannel is more compact and duller than ordinary coal, and can be wrought in the lathe and polished. ... On October 17, 1850, James Young, of Glasgow, Scotland, patented a method for the extraction of paraffin ("kerosene" in North America) from cannel coal. ...