If the room is lighted by artificial light, the best way is to cut an opening in the wall or partition at the most convenient place, make a frame to fit or cover this opening, that will raise or slide, glaze it with red orange glass. On a shelf outside the opening place your gas-burner or lamp, with a large reflector behind, so as to reflect all the light through the glass into the room. If gas is used on the outside an argand burner will be the best, with a common white glass chimney for ordinary work, but for the most sensitive plates a light green or thin ruby chimney will be absolutely safe.
If a kerosene lamp is used, the common white chimney with full flame will be safe; and being outside, the room will not be heated by its flame, nor rendered offensive by its smoke and odor.
In front of the window or of the artificial light, p50 erect a shelf or place a small table with a level top, which will support the developing dishes and bottles of developing solution, and on which the work of development may be carried on.
WASHING BOX.
If the room is so situated that neither window nor gas may be used in the manner suggested, then procure Carbutt's Developing Lantern, which is a most convenient lantern, not only for developing, but for other purposes. See figure.
The dark room should be supplied with running water, and the more generous the supply, the better, as a dry plate requires much washing, and a large stream will do the work much quicker than a small one.
In many instances, however, where running water may not be had, the washing box may be used with advantage. If running water is used, be careful not to use too much pressure; by attaching a rubber hose to the faucet and passing it over a nail or hook above, the pressure may be reduced so that a full but gentle stream falls upon the plate.
Safe closets should be provided to contain all sizes of plates; or the new p51 made by Anthony & Co., may be used instead, both for unexposed and for exposed plates awaiting development.
NEGATIVE BOXES