the frame, as shown in Fig. 5. to print from; but quite recently this objection has HOLDER. : The curved slotted spring catches at the top, when been overcome by the production of a specially pre- pushed outward: slip over a pin on the end of the pared film, which may be readily separated from its… … either a roll holder or a plate holder is employed, a re- If the operator does not wish to draw upon zine, Fig. 4.-THE ADJUSTABLE GROUND GLASS, versible back, enabling the operator to take pictures the design can be traced upon paper with a salt of upright or horizontally, and a special…
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