TY - JOUR T1 - On the Secondary Spectrum of Hydrogen JF - Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character (1905-1934) VL - 96 IS - 679 SP - 382 EP - 388 PY - 1920/01/02/ UR - http://dx.doi.org/10.1098/rspa.1920.0002 M3 - doi:10.1098/rspa.1920.0002 AU - Merton, T. ER -