Show regulates exposures automatically in making bromide prints and enlargements large ments it Is necessary to have a red or amber light glowing while the paper Is being manipulated and the white one is called into play while the exposure Is taking place after this the red light Is again needed where the electric light Is made use of tor for this purpose a french automatic device simplifies these operations A pointer Is placed on the dial at the number of seconds exposure then the operator aerator pulls upon a chain and the r red ed light goes out and white light comes on tor for the exposure for the right number of seconds then the red light is automatically thrown on and remains lit while the operator changes the paper for the next neilt exposure or until the chain is again pulled and so BO on the device is useful for making many exposures from the same negative |