WATER SUPPLY 



283 



Why should the cup be made of material that neither rusts 

 nor corrodes? 



What kind of material is best for the fixtures? 



Why should the stream 

 of water be steady? 



Why should the discharge 

 for waste water be large? 



Why should a drinking 

 fountain close automatically? 



Where should drinking 

 fountains be located? Why? 



What is the law in your 

 state regarding drinking 

 fountains and drinking cups? 



What diseases do you 

 think could be carried by 

 common drinking cups? 



Why are a number of 

 small sprays meeting at a 

 point better than a large 

 stream bubbling up? 



Why should the hands be 

 as far away from the mouth 

 as possible? 



Cisterns. Cisterns for 

 storage of water should be so 

 constructed as to be inspected 

 and cleaned occasionally. 

 They should be made of brick FlG 180 _ A drinking fountain for keeping 

 or wood, lined with tin or water cool, 



cement, and provided with 



an overflow pipe for allowing the excess water to run into a 

 drain. 



Wells. It is necessary to keep wells closely covered and pro- 

 vided with a stratum of earth sloping away from the mouth of the 

 well, since ground water is liable to run into the well and cause 

 pollution. The boards covering the well should be tightly fitted 



