GLYCERITA Glycerites. 



Are mixtures of medicinal substances with gly- 

 cerin. 



How many are officinal? Two. 



Name them. 



Glyceritum Arnyli, Glyceritum Vitelli. 



GUMS. 



Gums are vegetable substances which form with 

 water a thick, glutinous liquid mucilage. They 

 are insoluble in alcohol. 



How many are officinal? Two. 



Name them. 



Acacia and Tragacantha. 



Is Gum Tragacantha soluble in water? No. 



GUM RESIN>. 



Are natural mixtures of gum and resin obtained 

 as exudations from plants. 

 Name two. 



Myrrh and Asafcetida 



INFUSA-Infusions. 



Are liquid preparation made by treating the drug 

 with hot or cold water without boiling. 

 How made? 



Maceration, Percolation, 



Digestion, Dilution. 



Why is cold water used in making infusion of 

 Prunus Virginianae? 



To prevent loss of the Hydrocyanic Acid. 

 What strength should infusions be made where 



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