TY - JOUR T1 - The Absorption of Light by Elements in a State of Vapour: The Halogens JF - Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character (1905-1934) VL - 99 IS - 701 SP - 456 EP - 461 PY - 1921/09/01/ UR - http://dx.doi.org/10.1098/rspa.1921.0060 M3 - doi:10.1098/rspa.1921.0060 AU - Dobbie, J. AU - Fox, J. ER -