1947 Volume 25 Issue 1-3 Pages 42a-43
The sudden changes of the atmospheric potential gradient on the occasion of the lighting discharge were recorded-at four or five station each separated by the distance of several kilometers in July and August, 1941, in the neighbourhood of Maebasi, Gumma Prefecture. The quantity of the electric charge neutralized by the lighting discharge is about 90 coul. in the average, which is several times greater than that obtained by O. T. R. Wilson and T. W. Wormell.