455.    ---------------.[CHAKRAVARTY, K. M.]  Catalytic Reduction of Carbon Monoxide.  Sci. and Culture, vol. 4, 1938, pp. 300-301; Chem. Zentralb., 1939, I, p. 3996.

                  CO can be reduced at 248° by means of a Ni-Cu catalyst activated and reduced at 275° to a gas mixture, which contains more olefins (3.7%) than CH₄ (1.7%).