The Dark Room: Developing and Printing 55 



and allows him to develop it more exactly in 

 accordance with the exposure. 



A good formula, that produces vigorous nega- 

 tives, is made up in two solutions, as follows: 

 No. 1. Dissolve 2\ ounces sulphite of soda, crys- 

 tals, and 1^ ounces carbonate of soda, crystals, in 

 15 ounces of water. No. 2. Dissolve 8 grains 

 oxalic acid in 1 2 ounces of water and add \ ounce 

 of pyro. To develop, take 1 ounce of No. 1, \ 

 an ounce of No. 2, and add 3 ounces of water. 

 Another good formula is: No. 1. Water 16 

 ounces ; sulphite of soda, crystals, 4 ounces ; car- 

 bonate of potash, dry, \ ounce. No. 2. Dis- 

 solve 8 grains oxalic acid in 1 2 ounces of water 

 and add \ ounce of pyro. For use take } ounce 

 of No. 1, 2 drams of No. 2, and add \\ to 3 ounces 

 of water according to whether the negative be 

 over or under exposed. If the latter, the most 

 water should be used ; if the former, the least. 

 With a normal exposure about 2 to 2J ounces of 

 water should be used. 



Of all the new developers that have been placed 

 on the market in late years, metol has probably 

 found the greatest favor. It is a very rapid de- 

 veloper, causing the image to appear, on a nor- 

 mally exposed plate, in from three to six seconds, 

 and the entire development should be accom- 

 plished in from one and a half to two minutes. 

 For soft effects it is excellent, giving plenty of 



