BEALE'S PRUSSIAN BLUE GLYCERIN MASS. 233 



Glycerin Masses (cold). 



473. As to Glycerin Masses. Glycerin masses are certainly 

 very convenient, and give very good results from the scientific 

 not from the aesthetic point of view. They have a great 

 defect for the injection of fresh specimens, that is, those in 

 which rigor mortis has not set in ; they stimulate the contrac- 

 tion of arteries. In these cases it may be advisable to use 

 nitrite of amyl as a vaso-dilatator. The animal may be 

 anaesthetised with a mixture of ether and nitrite of amyl, and 

 finally killed with pure nitrite. Or, after killing in any way, 

 a little nitrite of amyl in salt solution may be injected before 

 the injection mass is thrown in. In any case it is advisable 

 to add a little nitrite to the mass just before using. The 

 relaxing power is very .great (see DVIATT and SARGENT, in St. 

 Louis Med. Journ., 1886, p. 207; and Journ. Roy. Mic-. Soc., 

 1887, p. 341). 



474. Scale's Carmine Glycerin Mass (How to Work, fyc., 

 p, 95). Five grains of carmine are dissolved in a little water 

 with the aid of about five drops of ammonia, and added to 

 half an ounce of glycerin. Then add half an ounce of glycerin 

 with eight or ten drops of acetic or hydrochloric acid, gradu- 

 ally, with agitation. Test with blue litmus paper, and if 

 necessary add more acid till the reaction is decidedly acid. 

 Then add half an ounce of glycerin, two drachms of alcohol, 

 and six drachms of water. 



475. Robin's Carmine Glycerin Mass (Traite, p. 33). Consists 

 of the following vehicle : 



Glycerin ..... 2 parts. 



Alcohol 1 



Water 1 



Combined with one third or one fourth its volume of the 

 carmine colouring mass, ante, formula No. 434. 



476. Beale's Prussian Blue Glycerin Mass (How to Work, fyc., 

 p. 93). 



Common glycerin .... 1 ounce. 



Spirits of wine ..... 1 



Ferrocyanide of potassium . . 12 grains. 



Tincture of perchloride of iron . . 1 drachm. 



Water 4 ounces. 



