206.    -----------------. [ BERL, E., AND BEMMANN, R.] [Effect of Hydrogen on Charcoal and Active Carbon and the Methane Synthesis.]  Ztschr. Physik. Chem., vol. A162, 1932, pp. 71-93; Chem. Abs., vol. 27, 1933, p. 223.

                  Pressure hydrogenation of charcoal and activated C gives CH₄ almost entirely.  The thermodynamic equilibrium leads to certain conclusions on free energy of para-crystalline C.  Natural C gives liquid hydrocarbons, but since charcoal and activated C give none of them, their structure must be fundamentally different.  Presents views of the structure and reaction mechanism.