. Gamboge 25 



To make 100 pills. 



What is the strength of Pil. Opii? I grain, 

 What is the strength of Pil. Phosphorus? .01 

 grain. 



RESINS Resins. 



Are the solid resinous principles of drugs precipi- 

 tated from their alcoholic solutions by water. 

 How many officinal? Four. 

 Name them. 



Resina Jalapae, Resina Copaibae. 



Resina Podophylli, Resina Scammonii. 



RESINS. 



Are solid or semi-solid exudations from plants, 

 insoluble in water, mostly soluble in Alcohol. They 

 are usually the oxidized turpens of plants. Some 

 of them unite with alkalies to form soaps as common 

 resin. 



Name two. 



Common Resin (Colophony). 

 Resin of Copaiba. 



Describe them. 



When pure they are usually transparent, hard 

 and brittle; when they contain water, are opaque, 

 and no longer hard and brittle. 



SPIRITUS-Spirits. 



Are Alcoholic solutions of volatile substances. 

 How many methods used in preparing them? 



Five. 



Name them. 



91 



