320.    ---------------. [BOUDOUARD, O.] [Reducing Action of Carbon on Metallic Compounds.]  Bull. soc. chim., ser. 3, vol. 25, 1901, pp. 282-287; Jour. Chem. Soc., vol. 2, 1901, p. 314. 

                   Reduction of metallic compounds by heating with pure C at temperatures of 445°-1,150° is not due directly to C but to CO, a trace of which is always present to start the reaction.  The CO₂ formed is then decomposed by C with the regeneration of CO and so on indefinitely.  The results are in accord with the reaction 2CO=CO₂+C.