These are brief instructions on fitting up a camera for enlarging to whole-plate, using a 1/4-plate Instantograph lens. The camera consists ot a light-tight box E with rails II, along which runs a whole-plate printing frame G, grooved to fit. The camera I is placed upon the level platform A supported by B, and racked out to the correct extension. The negative C is then placed in the position usually occupied by the focussing screen. An image is projected through the lens D on to a sheet of bromide paper placed in contact with the glass F, the frame having been adjusted to the correct distance from the lens along the rails. If a fixed focus camera (which will be found very inconvenient to use) is preferred, the box need only be fitted with a hinged and light-tight door, on which the bromide paper is pinned. If the focus of the lens is 5 in. the box must be loin, long if fixed, or 17 in. with the frame and the small camera extended 7 A in. Procure a whole-plate frame and make the box to fit.

To focus, place a sheet of ground glass in the printing frame.

An Enlarging Camera.