Read Mineral Resources of the United States, 1925, Vol. 2: Nonmetals (Classic Reprint) - Frank J Katz | PDF Online

Excerpt from Mineral Resources of the United States, 1925, Vol. 2: NonmetalsIt will be noted that the average value per ton is much higher for the plants in the Central States than for those in Pennsylvania, a difference that is explained in part by location Of the plants with respect to their supply Of raw fuel and in part by the prices Of competitive fuels.About the