- NOTE
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The "blue flame" mentioned here is more commonly seen when burning charcoal.
You may ocassionally observe this when burning mineral coal but it is rare.
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Learning metalworking, metalcraft.
Metal trade education. Hobbysmith.
THE BLACKSMITH'S SHOP: Blacksmithing and Tools. 'blue flame', charcoal, coal, coals, pumping bellows, horseshoeing, mule, 'wetting the coal', 'old-fashioned blacksmith shop'
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Working in Metals by Charles C. Sleffel