3174.     SHIBATA, Z., AND TERASAKI, Y.  [Promoting Carburization of Iron by Barium Carbonate.]  Nippon Kinzoku Gakukai-Shi, vol. 2, 1938, pp. 187-192; Chem. Abs., vol. 32, 1938, p. 7382.

        Electrolytic Fe specimen was carburized by CO at 900° for 2 hr.  When BaCO₃ was placed in the carburizing chamber, it accelerated the carburization.  Conclusion: CO gas is adsorbed on the surface of BaCO₃ and then decomposed by the reaction:  4 CO=C₃O₂+CO₂.  C₃O₂ is desorbed and partly polymerized and decomposed by the reaction:   C₃O₂=C₂+CO.  The C₂ gas will diffuse into the Fe, and solid solution is formed.

        SHIFFLER, W. H.  See abs. 2771.

        SHILLING, W. G.  See abs. 2578, 2579.

        SHIMAMURA, K.  See abs. 1344, 1345, 1346, 1349, 1350.