To fix bromide prints keep them moving in a bath made by dissolving 8 ounces of hypo in 2 quarts of water and then adding ¹⁄₄ ounce of metabisulphite of potassium and ¹⁄₄ ounce of powdered alum. Let the prints remain in this bath for about 10 minutes and then wash them thoroughly.
How to Make a Reflectoscope.
—A reflectoscope is a kind of magic lantern but instead of using transparent glass slides you can use any picture or opaque object such as the works of a watch, your hand, etc, and throw an image of it on the screen.
Fig. 59 a cheaply made reflectoscope
A. The projector.
B. The illuminator.
If you have a folding camera[58] you can convert it into a dandy reflectoscope, so get busy with your tools. Make a box—it is really two boxes fastened together—of the peculiar shape shown in [Fig. 59], and it can be of wood or of metal as you wish.
[58] A box camera can not be used because its focus is fixed.
First make the larger box, which we will call the projector, and this should be 4¹⁄₂ inches long, 5 inches wide and 5 inches high[59]—and leave the front, back and one side off. To the top and bottom fasten on two wood cleats ¹⁄₂ an inch square and 5 inches long to fix the projector to the camera with. This box is shown at [A in Fig. 59].
[59] It must fit the back of your camera.