Distinguish between a Precipitate and a Sediment, 

 giving an example of each. A Precipitate is solid 

 matter thrown out of solution by chemical action, 

 while a Sediment is the settling to the bottom of 

 solid matter suspended in a liquid. 



What are Narcotics? Medicines which have a 

 sedative influence, frequently promote sleep, relieve 

 pain and produce insensibility. 



What lead salts are used in making Goulard's 

 Extract? Acetate of Lead and Oxide of Lead. 



What are the chief constituents of air? Oxygen 

 23, Nitrogen 77, by weight. 



Define the terms Deodorizer, Disinfectant and 

 Antiseptic. 



Deodorizers are substances which decompose 

 offensive effluvia. 



Disinfectants are substances which decompose 

 putrid and infectious matter. 



Antiseptics are substances which prevent putre- 

 faction. 



What is an Acidulous Radical? A group of ele- 

 mentary substances which unite with Hydrogen to 

 form acids and with bases to form salts. 



Why are some salts acid in reaction while others 

 are alkaline? Those which are acid, are combina- 

 tions of a strong'acid and a weak base. Those alka- 

 line in reaction are combinations of a strong alkali 

 with a weak acid. 



What is an acid? An acid is a substance formed 

 by the union of Hydrogen with an acidulous radical, 

 and forms salts by having its Hydrogen replaced by 

 a base. 



What is a base? A base is a substance which re- 

 places the Hydrogen of an acid and forms a salt. 



What remains when ignited Phosphorus has re- 



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