TY - JOUR T1 - A Study of Catalytic Actions at Solid Surfaces. Part IX. The Action of Copper in Promoting the Activity of Nickel Catalyst JF - Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character (1905-1934) VL - 102 IS - 714 SP - 27 EP - 32 PY - 1922/10/02/ UR - http://dx.doi.org/10.1098/rspa.1922.0069 M3 - doi:10.1098/rspa.1922.0069 AU - Armstrong, E. AU - Hilditch, T. ER -