Bulletins. 493. Carbonizing properties, West Virginia coals from Eagle, no. 2 gas, Pocahontas no. 3, and Pocahontas no. 4 beds [with Publications on survey of carbonizing properties of American coals]; by J. D. Davis, D. A. Reynolds, R. E. Brewer, W. H. Ode, B. W. Naugle, D. E. Wolfson, and G. W. Birge.