48 ELEMENTARY PHOTO-MICROGRAPHY. 



B. 



Sodium hydrate ... ... 50 grains 



Water ... ... ... 10 ounces 



Equal parts of A and B are taken to make one ounce 



of developer. 



Metol is the best for bromide prints, as it does 



not stain like some others. 



A. 



Metol ... ... ... 50 grains 



Sodium sulphite ... ... i ounce 



Potassium bromide ... ... 6 grains 



Water ... ... ... 10 ounces 



B. 

 Potassium carbonate ... 3 drams 



Water 10 ounces 



Equal parts of A and B and a few drops of bromide 

 if necessary are taken. The metol must be dis- 

 solved first when making the solution A. 



Kachin is a developer than answers equally well 

 with ordinary plates, lantern plates, and bromide 

 prints ; and after the beginner has obtained some 

 proficiency he may find it a convenience to have 

 only one developer instead of three. It is rather 

 deceptive, as it gives negatives that lose density in 

 the fixing bath; therefore longer development is 

 necessary. 



A. 

 Kachin ... ... ... 72 grains 



Sodium sulphite ... ... 350 ,, 



Potassium metabisulphite ... 30 

 Water 8 ounces 



