National Geographic : 1910 Dec
AN IDEAL FUEL MANUFACTURED OUT OF WASTE PRODUCTS The American Coal Briquetting Industry BY GUY ELLIOTT MITCHELL HOW perfectly formed some of the hills of that range are, lying just to the left of the railroad. They look symmetrical enough to be artificial." "Well, they do, for a fact. To tell you the truth, they are. They were made by men." "Made by men? Mound-builders? Why, there are dozens of them; those abrupt slopes are hundreds, almost thou sands of feet long-a regular mountain chain." "True, and they are uniformly the most valuable mountains in existence; but they are, indeed, man-made; at the same time they are waste. They are mountains of solid carbon-coal dust culm and slack from the mines-millions of tons of it." More than one traveler has remarked thus on the huge coal-dust hills which break the skyline of the various coal mining regions. Last year the coal mined in the United States was 445,000, ooo tons; but in the process of mining A HILL CONTAINING THOUSANDS OF TONS OP ANTHRACITE COAL WASTE, OR REJECTED CULM : SCRANTON, PENNSYLVANIA Probably 200,000,000 tons of anthracite, worth $200,ooo,ooo, were lost last year as dust and waste, which, if converted into briquets, as in Germany or France, could have been profitably used. The heating value of this coal dust is even greater than that of the marketed coal. Billions of dollars have been thus wasted in the United States since coal mining began.