12. Developing Outfit

Developing Outfit. The room should contain, besides the sink with a tap above it, a table and several shelves, four developing trays, one fixing box, one washing box, one 16-ounce graduate, one 4-ounce graduate, one minim glass, one hydrometer, one stirring rod; several large mouthed glass stoppered bottles, one 64-ounce for sulphite of soda stock, one 64-ounce for carbonate stock, one 36-ounce for pyro stock and one 36-ounce to hold old developer, one camel's hair dusting brush, a pair of scales and negative racks.

13. Chemicals

Chemicals. The following chemicals are necessary: Carbonate of Soda, Sulphite of Soda, Hypo-Sulphite of Soda, Pyro, Sulphuric Acid, Nitric Acid, Red Prussiate of Potash, Persulphate of Ammonia, Bromide of Potassium and Bichloride of Mercury.

14. A Convenient Dark Room - The accompanying illustration No. 3 gives the floor plan together with the dimensions of a very convenient combination dark room. This room can be used for all the different photographic processes requiring a room which is totally dark. The size of the room is 10 x 20 feet. Access to the room is made through a vestibule double door without admitting any light. Both doors are fitted with heavy spring hinges so that when entering or leaving, the first door is closed before the second one is opened.

15. Developing Sink

Developing Sink. Space has been allotted in each section of the room for certain particular work, such as the loading of the plate holders, developing and fixing plates, making gaslight prints, making bromide and negative enlargements, etc. The side of the room including the vestibule entrance and the two large sinks on either side is illustrated in Illustration No. 4.

The sink to the left which is nine feet long, is used for developing and on account of its size is very convenient for the general manipulation of plates and films. Across the top and on a level with the sink is arranged a movable rack twenty-four inches long by the width of the sink, upon which to rest the developing tray while developing. This rack is made of one-inch square strips.

16. Washing Box

Washing Box. The washing box for 5x7 and 8x10 plates should be placed in this sink and a very convenient one may be easily constructed of one-inch pine lumber according to the following instructions: - The length of the box on the inside should be thirty inches, while the width should be eleven inches. Nine and one-half inches from one end of the tank place the partition C, D), and equally divide lengthwise the remaining larger section by the partition A, B. Both sides of this partition, A,B, should contain grooves one-fourth inch deep and one-half inch apart and the side of the box H, D, and G, C. should also be grooved as well as the end B, F, and the side of partition C, D, which faces the smaller section of the washing box. There will now be three divisions, two to accommodate 5x7 or 4x5 plates, and another for 8 x 10 plates. A U-shaped piece of lead pipe, perforated on the sides with small holes, should be placed in the bottom of the tank before inserting the partitions. The pipe should enter the tank at one end at the point marked M and if properly placed it will come in the center of each of the divisions made for 5x7 plates. On each side of the pipe is placed wooden strips for the plates to rest on. On the outside of the box at M, the pipe turns upward and extends a few inches above the top of the box and is connected to a faucet with a short piece of rubber hose. (See illustration No. 5.) In addition to the washing box there are two rubber hypo tanks - for fixing 5x7 or 8 x 10 plates.

Illustration No. 5 A Plate Washing Tank See Paragraph No. 16

Illustration No. 5 A Plate Washing Tank See Paragraph No. 16.