GLYCERIN 



calico moistened with glue are applied in various directions 

 over the injured spot. Such plasters are sometimes useful 

 in keeping sutured wounds in position, giving support, and 

 preventing annoyance by flies. They are sometimes effectual 

 in the treatment of umbilical hernia in calves and foals. 



Gelatin solutions make useful temporary protectives for 

 limited abraded surfaces ; hold well for a day or more if 

 applied dry ; are readily washed off with hot water, without 

 irritating the skin, and can be medicated with antiseptics, 

 stimulants, or analgesics. Prick's wound gelatin is made 

 with gelatin soaked in sufficient one per cent, sublimate 

 solution to cover it ; after it has become soft it is dissolved 

 by heat, and glycerin equal in quantity to the tenth part 

 of the dry gelatin is added. It is warmed before use and 

 applied with a brush or a pledget of cotton. The familiar 

 court sticking plaster consists of a strong solution of isinglass 

 painted over thin silk. In pharmacy gelatin is used for 

 clarifying or fining ; as a neat and cleanly capsule for pills 

 and boluses ; and along with glycerin forms lamellae or 

 thin discs for enveloping the alkaloids and other active 

 principles used for eye cases and hypodermic injections. 



GLYCERIN 



GLYCERINUM, or Glycerol, is a trihydric alcohol, C 3 H 5 (OH) 3 , 

 associated with a small percentage of water ; it is 

 obtained by the interaction of alkalies, or of superheated 



t steam, with fats and fixed oils (B.P.). 



Glycerin was discovered in 1789, by Scheele, as a product 

 in the manufacture of lead plaster ; it occurs in small 

 amount during the fermentation of sugar, and as a by- 

 product in the manufacture of soap and stearin candles. 



PROPERTIES. It is a clear, colourless, syrupy liquid, 

 devoid of odour, sweet to the taste, oily to the touch, with 

 a specific gravity of 1*260. It has a strong affinity for 

 water, and is freely soluble in water and alcohol. Insoluble 

 in ether, chloroform, and fixed oils. It dissolves most 

 substances which are soluble in water, as well as metallic 

 oxides, and alkaloids. It burns with a luminous flame 3 



