Page:On the Continuity of Effect of Light and Electric Radiation on Matter.djvu/19

172 effects described below may be obtained by much feebler light, such as that given by a paraffin lamp or a candle. The strong similarity to

the curve for single flashes of electric radiation (see fig. 4) will at once be noticed. The recovery curve is also convex to the abscissa. The time allowed for recovery was not sufficient to bring the substance