293.    ---------------.  [BONE, W. A., AND COWARD, H. F.] Direct Union of Carbon and Hydrogen.  II.  Synthesis of Methane.  Jour. Chem. Soc., vol. 97, 1910, pp. 1219-1225; Proc. Chem. Soc., 1910, vol. 26, p. 137; Chem. Abs., vol. 4, 1910, p. 2038.

                  From less than 0.03 gm. of purified sugar charcoal, containing not more than 0.06% ash and less than 0.1% H₂, not less than 95% CH₄ results by maintaining it in a stream of pure dry H₂ at 1,150° for 17-25 hr.