LINIMENTA. 

 Official Liniments (continued): 



EMULSA. 



61 



MUCILAGINES. 



Mucilages are aqueous solutions of the viscid, gummy principles of some vege- 

 table substances. Their principal uses are for the preparation of emulsions, and as 

 excipients in pills. 



They do not keep well, especially in warm weather. 



Prepare the official Mucilage of Acacia as follows : In a flask place 20 Gm. acacia 

 in small fragments; wash with cold water, then drain. Add 40 mils warm distilled 

 water, stopper container, and frequently agitate contents until the gum is all dissolved; 

 then strain through cheese-cloth. 



Note present properties, and keeping properties: 



The other official Mucilage is Mucilage Tragacantlise. 



EMULSA. 



Emulsions are aqueous preparations wherein oils or resins are maintained in a 

 fine state of subdivision and suspension by means of the presence of mucilaginous or 

 other viscid substances. 



Prepare the official Emulsum Olei Terebinthinse as follows : Into a perfectly dry 

 flask introduce 15 Gm. acacia, in fine powder; add 15 mils rectified oil of turpentine, 

 and 5 mils expressed oil of almond, and agitate the mixture thoroughly. Next add 30 

 mils water, mixing this in with vigorous shaking. When emulsification is complete 

 add 25 mils of syrup in 5-mil portions, shaking thoroughly between each addition. In 



