The southwestern Pennsylvania town of Connellsville lay in the middle of a massive reserve of high quality coal. Connellsville coal was so soft and easily worked that one man and a boy could cut and load ten tons of it in ten hours. This region became a major source of coke, a vital material in industrial processes, above all in steel manufacture, producing forty-seven percent of America s supply in 1913. But by the 1920s, what had seemed to be a...