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164
Prof. J. C. Bose. On the Continuity of
[Apr. 18,
there we have partial recovery between quickly recurring flashes, and there is thus observed a fluctuation about the balanced position. Now
Fig. 5.—Variation of resistance (deduced from diminution of galvanometer deflection) in Ag′ receiver produced by electric radiation lasting from 15″. Distance of radiation 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.
when the intensity of radiation is increased by decreasing the distance of the radiator to 25 cm. (see b), the strain effect persists for a little longer time, and the flashes arrive before the substance can recover to any extent; thus there is less fluctuation in the balanced position.
