3274.     STERN, D. J.  Production of Oil From Coal.  South African Min. and Eng. Jour., vol. 61, II, 1951, pp. 851-855; Chem. Abs., vol. 45, 1951, p. 4910.

        Principles of the Bergius and Fischer-Tropsch processes, the mechanical engineering problems involved, underground gasification, Russian developments, and American practices are surveyed.