698.    DEVILLE, H. S.  [Dissociation of Carbon Monoxide.]  Compt. Rend., vol. 59, 1864, p. 873; vol. 60, 1865, pp. 317-325.

     Discovery is made that the reaction CO₂+C=2CO is reversible.  Only a small degree of dissociation was observed at temperatures a little lower than the melting point of Ag, while at temperatures above 1,000° none could be observed.