127 — 



water-bath until the gehitin melts, then add the gl3'eerine 

 while stirring with a clean glass rod, and finally add the 

 carbolic acid. Filter throuuh a hot flannel. 



The gum glycerine may be prepared according to Far- 

 rant's formula : 



Glycerine, 50 c. c. 



Water, 50 c. c. 



Gum Arabic (powder), . . .' 50 grms. 



Arsenious acid, .... 1 grm. 



Dissolve the arsenious acid in the water, Phux; the 

 gum arable in a glass mortar and mix it with the water, 

 then add the glycerine. Filter through a wet filter paper 

 or through fine muslin. 



