Abstract
The simultaneous and continuous observations of atmospheric electric potential gradient were made at several stations in Kyoto City which has about one million population. The diurnal variations in calm days were observed, and the characteristic diurnal variation in Kyoto City as well as the locality within some kilometres were clarified. The diurnal variation at Iwakura 6km apart from the centre of the city had quite a different type from the stations near the centre. The station 5km. apart from the centre had a diuranal variation partly influenced by the centre. And the station 4km. apart from the centre and about 120 metres higher than the others had the different feature from others.
