TY - JOUR T1 - The Charges on Ions in Gases, and the Effect of Water Vapour on the Motion of Negative Ions JF - Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character (1905-1934) VL - 81 IS - 550 SP - 464 EP - 471 PY - 1908/12/31/ UR - http://dx.doi.org/10.1098/rspa.1908.0106 M3 - doi:10.1098/rspa.1908.0106 AU - Townsend, J. ER -