CHAPTER VII. 



RECIPES, FORMULA AND USEFUL HINl'S. 



Ammonia carmine. 



Pulverized carmine 1 5 grains. 



Aqua ammonia (strong) 40 drops. 

 Absolute alcohol i oz. 



Glycerine 2 oz. 



Distilled water 2 oz. 



Put the carmine m a test tube. Pour in the ammonia, boil a few 

 seconds and set the whole aside for a day to allow the superfluous am- 

 monia to evaporate. Add the mixed glycerine and water, then the al- 

 cohol and Alter. 

 Borax carmine. 



Pulverized carmine 15 grains. 



Saturated aqueous solution of borax 15 fl. dr. 

 Mix and add absolute alcohol 15 £1. dr. 



Filter and collect the crystals when dry. Dissolve nine grains of the 

 crystals in one ounce of distilled water. 



Picrocarminate of ammonia (Picrocarmine). 



Make a strong solution of carmine in ammonia and water, and a 

 saturated solution of picric acid in water. Mix the acid solution with 

 the carmine until the ammonia is just neutralized. Then filter. 

 Scematoxylin. 



Rub together in a mortar one part extract of logwood and three parts 

 pulverized alum (by measure) and afterward add enough water to dis- 



(135) 



