583.    --------------.[COAL CARBONISATION.]  Liquid Fuels in Germany.  Vol. 3, 1937, p. 78; Tech. Moderne, April 1937, p. 255.

      Four plants are operating at Homberg, Castrop-Rauxel, Oberhausen-Holten, and Ruhland.  The last-named plant has been enlarged to a capacity of 150,000 tons of oil per yr.