Show self developing plates the amateur photographer slid the milk colored plate into a tray and poured over it a pint of water mag icalla then in the mysterious ruddy light fine black lines began to appear they ran this way and that they crossed deepened spread soon the plate had turned from white to black it has dei developed eloped itself you see said the photographer but how you put nothing but water on it tell you just as the surface of this plate Is coated so there Is a coating on the back a transparent coating of extremely soluble developer yoi need only pour on water when the developing ve che chemicals licals at once dissolve and in that developing solution the image begins immediately to appear A good idea isn t it no these self developing plates are not yet on the market they are still a little imper feet soon though they will be as perfect and as common as self raising flour |