2667.     ---------------.  [PICHLER, H.]  [Progress in the Field of Coal Utilization.]  Ztschr. Ver. deut. Ing., vol. 74, 1930, pp. 720-722; Ges. Abhandl. Kenntnis Kohle, vol. 10, 1932, pp. 594-604; Chem. Abs., vol. 24, 1930, p. 3879.

        Discusses chemical improvement of coal, especially from the viewpoint of producing liquid fuel.