Coal. Carbonizing properties and petrographic composition of Upper Banner bed coal from Clinchfield no. 9 mine, Dickenson County, Va., and of Indiana no. 4 bed coal from Saxton no. 1 mine, Vigo County, Ind., and effect of blending these coals with Beckley bed coal; by A. C. Fiddlier, J. D. Davis, R. Thiessen, W. A. Selvig, D. A. Reynolds, R. E. Brewer, and G. C. Sprunk.