TY - JOUR T1 - A Photographic Spectrum of the Aurora of May 13-15, 1921, and Laboratory Studies in Connection with it JF - Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character (1905-1934) VL - 101 IS - 709 SP - 114 EP - 124 PY - 1922/05/01/ UR - http://dx.doi.org/10.1098/rspa.1922.0030 M3 - doi:10.1098/rspa.1922.0030 AU - Rayleigh, L. ER -