Water Supply 219 



ports near the ceiling of the bath-room, or the 

 room which contains the commode, or at one 

 end in the upper part of the clothes-press; pro- 

 vided, however, that the discharge pipe is made 

 so large that under no contingencies will the 

 tank overflow. If the house is fairly large and 

 the cistern capacious, sufficient water may be 

 pumped into the tank from the cistern in a few 

 minutes to supply all wants for the day. From 

 the tank it will flow by gravity into the hot 

 water boiler and to all other pomts desired 

 which are not above the tank. If water be 

 raised by means of an aermotor, a storage tank 

 will still be necessary, as the wind may fail to 

 operate the motor for an entire day. By what- 

 ever ^means water is secured, the supply should 

 be ample at all times. Springs and wells in the 

 middle and northern states, and cisterns in the 

 southern states will, in most cases, serve to sup- 

 ply the potable water needed, but these are too 

 often inadequate to supply the large demand 

 for water made by the animals, and the extra 

 demand for water in the house made by cleaner 

 and more sanitary methods of living. 



In using water in the household, it becomes 

 mixed with a great variety of organic substances 

 which pollute it, and which tend to putrefaction 

 and decay. As these various organic substances 

 break down, numerous compounds are produced, 



