905.    ---------------.  [FIELDNER, A. C.]  Recent Developments in the Production of Motor Fuels From Coal.  Bureau of Mines Inf. Circ. No. 6075, 1928, 18 pp.; Fuel, vol. 7, 1928, pp. 492-501; Chem. Markets, vol. 23, 1928, pp. 375-378; Chem. Abs., vol. 23, 1929, p. 1245.

     Review of the production of motor fuel by:  (1) Carbonization of coal; (2) the Bergius process; and (3) the complete gasification of coal and conversion of the gases by pressure synthesis.  It is believed that the Bergius process, or some modification of it, will prove most economical.