Page:Collected Physical Papers.djvu/196

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176
EFFECTS OF LIGHT AND ELECTRIC RADIATION

In fig. 36 are shown the effects of rapidly succeeding flashes of radiation caused by the spring vibrator of a

Fig. 36. Variation of resistance (deduced from diminution of galvanometer deflection) in Ag′ receiver produced by electric radiation lasting for 15″. Distance of radiator in (a) = 40 cm.; in (b) = 25 cm.; and in (c) = 15 cm. In (d) is given a series of curves taken after half an hour with the radiator at a distance of 15 cm. The numbers on the left side of the upper curve indicate the absolute value of resistance.