256 



GENERAL SCIENCE 



is the bleaching agent used to bleach rags in the paper 

 mills, and to whiten cotton cloth in the cotton mill. 



Chlorine may be obtained by passing a current of 

 electricity through an aqueous solution of common salt. 



Sulphur. A large part of the sulphur used in the 

 world comes from Sicily and Louisiana. It occurs in 

 Louisiana in a deposit about one half mile in diameter 



FIG. 224. A Well Pumping Sulphur. 



and at a depth of 900 feet (Figure 224). It is a yellow 

 solid not soluble in water but soluble in carbon disulphide. 

 If a solution of sulphur in carbon disulphide is evaporated, 

 sulphur crystals will be formed. The evaporation must be 

 carried on over a steam bath, as carbon disulphide is very 

 inflammable. 



Sulphur- or brimstone has a number of uses. Sul- 

 phur oxide, which is formed when sulphur is burned in 

 the air, will destroy disease germs and vermin. To fumi- 



