. Portrait . Numbering Machine the white light is turned on the red light is off but it is notessential, the only point being the saving of current. In the top of the box is a slot about li x i inches insize. The box should be ventilated by boring a fewsmall holes or cutting slits in two sides, and covering thesewith two strips of wood placed at right angles to preventthe white light striking the film. The strips of woodshould be blackened on the inside. (See illustration.) 3 *P o v t rati,.

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