2(36 CHAPTER XXII. 



Proceed as before, dissolving the ferrocyanide in one half 

 of the glycerin, the iron in the other, and adding the latter 

 drop by drop to the former. Finally add the water and 

 HC1. Two drachms of alcohol may be added to the whole 

 if desired. 



I find this excellent. 



506. RANVIER'S Prussian Blue Glycerin Mass (Trait?, p. 120). 

 The Prussian blue fluid, 494, mixed with one fourth of glycerin. 



507. THOMA'S Indigo-Carmine (Arch. Anat. Phys., Anat. 

 ' AUh.j 1899, p. 270). Dissolve 0*15 grm. sulphindigotate of 



soda in 50 c.c. water, filter, add 40 c.c. glycerin and gradually, 

 with agitation, 10 c.c. of a filtered 10 per cent, solution of 

 sodium chloride in water. If desired, 3 c.c. of a 1 per cent, 

 solution of morphia may be added to dilate arteries. A fine 

 precipitate is formed, which is injected with the mass. 



508. Gamboge Glycerin (HARTING, Das Mikroskop, 1866, 2, 

 Theil, p. 124). Gamboge rubbed up with water and added 

 to glycerin ; or a saturated alcoholic solution of gamboge 

 added to a mixture of equal parts of glycerin and water. 

 Any excess of alcohol may be got rid of by allowing the 

 mass to stand for twenty-four hours. 



509. Other Colours. Any of the colouring masses, 485 to 498, 

 or other suitable colouring masses, combined with glycerin, either dilute 

 or pure. 



Purely Aqueous Masses. 



510. RANVIER'S Prussian Blue Aqueous Mass (Traite, p. 120). 

 The soluble Prussian blue, 494, injected without any 

 vehicle. It does not extravasate. 



511. MULLER'S Berlin Blue (Arch. Mik. Anat., 1865, p. 

 150). --Precipitate a concentrated solution of Berlin blue by 

 means of i to 1 volume of 90 'per cent, alcohol. The 

 precipitate is very finely divided ; and the fluid may be 

 injected at once. 



512. MAYER'S Berlin Blue (Mitth. Zuol. Stat. Neapel, 1888, 

 p. 307.) A solution of 10 c.c. of tincture of perchloride of 



