Cannel coal n. 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.
... 49. Cannel Coal is a variety of bituminous coal which can be ignited like a candle. This is because so many of the gases are still left, and it shows cannel to be less pure ... — An Introduction to Chemical Science • R.P. Williams
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