What is the general composition of Essential Oils? 

 They are usually mixtures of the liquid hydrocar- 

 bons or elaeoptens with oxidized hydrocarbons, 

 which are commonly solidbodies termed stearoptens. 



Name the officinal preparations of starch. Amy- 

 lum lodatumand Glyceritum Amyli. 



What is the composition and properties of Cyano- 

 gen? Cyanogen (CN) as met with in compounds 

 is a univalent radical, and behaves chemically like 

 the halogens. The gas (CN) 2 is very irritating to 

 the eyes and air passages, and possesses a pene- 

 trating odor like bitter almonds. 



What compound is formed with Cy and H? 

 Hydrocyanic, or Prussic Acid, HCN or HCy. 



What is a stearopten? Volatile oils are usually 

 mixtures of the liquid hydrocarbons, or eloeoptens,' 

 with oxidized hydrocarbons, which are commonly 

 solid or camphor-like bodies, termed stearoptens. 



What is Cryolite? A double floride of Aluminum 

 and Sodium. 



What is the best supporter of combustion ? Oxygen. 



Name two distinct forms of Carbon. Plumbago 

 and Diamond. 



What remains when ignited Phosphorus has re- 

 moved all oxygen from a confined portion of air? 

 Nitrogen. 



What do plants absorb from the air? Carbonic 

 Acid Gas. 



What do they give off into the air? Oxygen. 



What is absolute Alcohol? Alcohol freed from 

 water by treatment with lime, chloride of calcium or 

 other salt having a great affinity for water. 



What effect has Mercury upon Gold? Unites with 

 it, forming an amalgam. 



How would you separate Gold and Mercury when 

 mixed? By sublimation. 



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