29.     --------------. [ALLNER, W.] [Direct-Current Degasification Process of the Kassel Oven of the Bubiag-Didier System.]  Braunkohle, vol. 34, 1935, pp. 419-428; Chem. Abs., vol. 30, 1936, p. 7310.

               Detailed description of process using various forms of brown coal for the production of domestic or synthesis gas.  Coal drying, low-temperature carbonization, gas cracking, tar decomposition, coke gasification, and water-gas formation are involved in the operation.  Excess CO₂ is removed by scrubbing.  Economic aspects discussed.