This page has been validated.
radio-active substances.
9
plates for two different plate distances. Plate b was covered with a thin layer of powdered metallic uranium; plate a, connected with the electrometer, was provided with a guard-ring.
Fig. 2 shows that the intensity of the current becomes constant for high potential differences between the plates. Fig. 3 represents the same curves on another scale, and
Fig. 2.
Fig. 3.
comprehends only relative results for small differences of potential. At the origin, the curve is rectilinear; the ratio of the intensity of the current to the difference of
