68 METHODS OF MICROSCOPICAL RESEARCH. 

 NEUTRAL GLYCERINE TURNBULL'S BLUE FLUID. 



(Richardson's formula.) 



Ferridcyanide of Potassium, 10 grains. 

 Sulphate of Iron, 5 grains. 

 Distilled Water, 1 ounce. 

 Price's Glycerine, 2 ounces. 

 Alcohol, 1 drachm. 



Proceed as in the last formula. Mix the sulphate 

 of iron in 1 ounce of the glycerine, and the ferrid- 

 cyanide in a small quantity of water, and mix this 

 with the other ounce of glycerine. Gradually mix 

 these two solutions., with constant shaking, and add 

 the alcohol. 



Turnbull's blue is not so liable to fade as 

 Prussian blue. 



