This section is from the book "The Home Cyclopedia Of General Information", by Charles Morris. Also available from Amazon: Home Cyclopedia of Necessary Knowledge.
[O. E.] Mineral coal from which bitumen, sulphur, or gas has been extracted by roasting in a kiln or oven, or by distillation, as for gas.
It is smokeless, and is largely used in steel works and in foundries.
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