AbstractMeasurements of the atmospheric potential gradient made on a glacier at an altitude of 1,700 m showed a behaviour considerably simpler than is normally found near the ground. The nearness of the cloud, and the absence of point discharge for some kilometres gave a clear‐cut distinction between snow and rain, these almost always being associated with positive and negative fields respectively. The results suggest that the electrification processes are associated with the precipitation in both cases, and that marked electrical effects accompany the melting of sno