TY - JOUR T1 - The Spectrum of the Lighter Constituents of the Air JF - Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character (1905-1934) VL - 81 IS - 546 SP - 181 EP - 194 PY - 1908/08/27/ UR - http://dx.doi.org/10.1098/rspa.1908.0069 M3 - doi:10.1098/rspa.1908.0069 AU - Watson, H. ER -