That version of the story goes something like this: On July 1, 1937, Amelia Earhart and her navigator Fred Noonan departed from Lae, New Guinea in Earhartâs Lockheed Electra 10, on what was to be the longest portion of Earhartâs highly publicized round-the-world flight.
Before the coal is burned, it is pulverized to the fineness of talcum powder. It is then mixed with hot air and blown into the firebox of the boiler. Burning in suspension, the coal/air mixture provides the most complete combustion and maximum heat possible.
In light of this it is understandable that the fuel used for day-to-day cooking fires would also be used for forge fires as men discovered the various methods of shaping and working with metals. When coal was discovered it was found to produce a hotter fire than charcoal. As coal begins to burn, all of the various impurities (tars, oils, sulfur, various trace elements and gases, etc) are burned off, and all that remains is pure carbon.