3244.     SPILKER, A.  [Refining of Coal and Its Liquefaction.]  Braunkohle, vol. 26, 1927, pp. 545-553; Chem. Abs., vol. 21, 1927, p. 4047.

        General discussion of coal liquefaction, the MeOH process of the I. G. Farbenindustrie A.-G., the benzine synthesis of Fischer-Tropsch, the Synthol process, and the direct hydrogenation of coal by the Bergius process.