2927.     RUFF, O., AND GOECKE, O.  [Solubility of Carbon in Iron.]  Metallurgie, vol. 8, 1911, pp. 417-421; Chem. Abs., vol. 5, 1911, p. 3221.

        Solubility shows a maximum at 2,220° corresponding to the composition Fe₂C and a change in direction at 1,887° corresponding to the composition Fe₃C.

                    RUFF, O., AND KEILIG, F.  [Investigations at Higher Temperatures.  VIII.  Cobalt and Carbon.]  See abs. 2932.