WATER SUPPLY 



281 



Why should the water of a drinking fountain bubble at least 

 two inches above the fixture? 



FIG. 178. This type of drinking fountain is unsatisfactory. The hands may be 

 dirty and dirt may collect about the mouthpiece. The person may touch his 

 or her lips to the metal. Children have been known to put gum, sticks 

 and other dangerous material in the bowl of such a fountain. 



