98 PHOTOGRAPHIC PROCESSES. 



chloride alone, and its complete reduction to the 

 metallic state by the ammonia, may be obtained, if 

 the plate is washed immediately on the appearance 

 of the desired colour. 



The plate is put aside to dry spontaneously, as the 

 application of heat is liable to melt the film and 

 destroy the negative. 



Yarnish is unnecessary. 



If only one plate is developed at a time, or the 

 method of development described, considered too 

 complicated, Edwards' Developer may be used. 



Two stock solutions are prepared as follows : 



No. I. Pyrogallic Acid, 1 drachm. 

 Glycerine, 1 drachm. 

 Methylated Alcohol, 6 drachms. 



Mix the glycerine and alcohol, then add the acid. 



No. II. Bromide of Ammonia, gr. 7J. 



Liquor Ammonia?, '880, 1 drachm. 

 Glycerine, 1 drachm. 

 Distilled Water, 6 drachms. 



Add one part of each to fifteen parts of water and 

 use in equal proportions. 



These solutions will keep a long time if well corked. 



Ferrous oxalate or Eder's developer on account of 

 its simplicity and cleanliness, has lately become a 

 favourite with amateurs. It possesses few other ad- 

 vantages except that it can be used side by side with 



