Marion and Co., compiler · London : Marion and Co. · leaf 137
PRINTING FRAMES. 133 easing one spring at a time, and by opening one-half of the back, one-half of the print can be viewed without danger of shifting the relative positions of the print and the negative. … We here illustrate the more common style of frame, such as is used for small negatives, usually not for sizes larger than whole plate (8| x 6J). In this the negative itself is laid on to the rebate of the frame,
