218 INJECTIONS. 



The colouring masses recommended for combination with 

 the vehicles above described are made as follows : 



434. Carmine Colouring Mass (Traite, p. 33). Rub up in a 

 mortar 3 grammes of carmine with a little water and enough 

 ammonia to dissolve the carmine. Add 50 grammes of glycerin, 

 and filter. 



Prepare 50 grammes of acid glycerin (containing 5 grammes 

 of acetic acid for every 50 grammes of glycerin), and add it 

 by degrees to the carmine glycerin, until a slightly acid re- 

 action is obtained (as tested by very sensitive blue test-paper, 

 moistened and held over the mixture) . 



One part of this mixture is to be added to 3 or 4 parts of 

 the gelatin injection vehicle (ante, Formula 432), or of the 

 glycerin-gelatin (No.433),or glycerin-alcohol vehicle described 

 below, No. 475. 



435. Ferrocyanide of Copper Colouring Mass (Ibid., p. 34) . 

 Take 



(1) Ferrocyanide of potassium (concentrated 



solution) . . . . .20 c.c. 



Glycerin . . . . . 50 



(2) Sulphate of copper (concentrated solu- 



tion) 35 



Glycerin . . . . . 50 



Mix (1) and (2) slowly, with agitation ; at the moment of 

 injecting combine with 3 volumes of vehicle. 



. 436. Blue Colouring Mass (Prussian Blue) (Robin's modification 

 of Beale's formula, Ibid., p. 35) : 

 Take 



(A) Sulphocyanide of potassium (sol. sat.) . 90 c.c. 

 Glycerin . . . . . . 50 



(B) Liquid perchloride of iron at 30 . 3 

 Glycerin . . . . . . 50 



Mix slowly and combine the mixture with three parts of 

 vehicle. It is well to add a few drops of HC1. 



437. Cadmium Colouring Mass (Ibid., p. 3(5). 



Take- 

 Sulphate of cadmium (sol. sat.) . . 40 c.c. 

 Glycerin . . . . . . 50 



and 



