IN the course of analysis of simultaneous auroral and geomagnetic events at Fort Rae, North West Canada, during the Second International Polar Year, a feature has emerged about which we consider it advisable to make a preliminary report. If the elevation above the horizon of an auroral arc be φ, and if θ be the elevation of a concentrated linear electric current to which the simultaneous vector components H and Z in the geomagnetic meridian field may be attributed, then in seventy cases selected solely on the basis of a substantial magnitude of each of H and Z, and are on the same side of the magnetic vertical plane five times as frequently as on opposite sides.