The Effect of Oxygen in Coal: Bulletin 382.
GPO, Washington, DC: Dept. of the Interior/US Geological Survey, 1909. 8vo. 74 pp. Light soil to wraps. Dampstain to bottom corner. Oxygen and ash as impurities; relation of oxygen to coking; weathering and oxygenization. Nine folding charts. Very Good Wraps (Item ID: 6085)