Coal. Carbonizing properties and petrographic composition of upper Freeport coal from Morgantown district, Monongalia County, W. Va., and of lower Freeport coal from eastern Indiana County near Cambria County, Pa.; by A. C. Fieldner, J. D. Davis, W. A. Selvig, D. A. Reynolds, R. E. Brewer, G. C. Sprunk, and C. R. Holmes.