TY - JOUR T1 - A Comparison of the Radium Emanation Spectra Obtained by Different Observers JF - Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character (1905-1934) VL - 82 IS - 551 SP - 22 EP - 25 PY - 1909/02/16/ UR - http://dx.doi.org/10.1098/rspa.1909.0003 M3 - doi:10.1098/rspa.1909.0003 AU - Royds, T. ER -