620.    COMBUSTION.   Fischer-Tropsch Process in United States.  Vol. 14, No. 2, 1942, p. 44.

     New research has been authorized by Congress.  This process has certain advantages over the Bergius process.  The output of the latter is a liquid that requires further refining, whereas the Fischer-Tropsch process yields a number of separated fuel and lubricant products directly.  It also requires less precision machinery and is economically practicable in smaller units, about 30,000 tons annually compared with 150,000 tons for the Bergius process.  Both processes yield about 1 ton or between 250-300 gal. of liquid products from 4-5 tons of coal.