Page:Collected Physical Papers.djvu/242

222 (5) That the latent period of overcoming inertia corresponds to the photographic induction period.

(6) That the relapse of image is due to self-recovery.

(7) That owing to the tendency towards self-recovery the radiation effect does not solely depend on the total quantity of light, but depends also on the time-rate of illumination. Hence the photographic effects of intermittent and continuous illuminations of equal total durations, are not the same.

(8) That the continuous action of radiation produces recurrent reversals.

(9) That the molecular effects produced by light and electric radiation are similar.