TY - JOUR T1 - The Origin of the "Cyanogen" Bands JF - Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character (1905-1934) VL - 98 IS - 688 SP - 40 EP - 49 PY - 1920/09/01/ UR - http://dx.doi.org/10.1098/rspa.1920.0050 M3 - doi:10.1098/rspa.1920.0050 AU - Barratt, S. ER -