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THE WORK OF RUNNING WATER 



Almost every one has noticed how the opening of a faucet 

 in a home will reduce the force of the stream from a garden 

 hose. This illustrates what may happen on a larger scale 

 throughout a city system. The larger the number of faucets 

 running at one time, the lower the pressure. For this 

 reason, most cities try to prevent unnecessary use of water 



FIRE-TUG IN ACTION 



The "Graeme Stewart" on the Chicago River, throwing streams of 

 water under tremendous pressure. 



in homes during hours when business districts must be 

 served and protected against possible fires. This is why 

 many cities forbid the sprinkling of lawns during the busy 

 hours of the day. 



The Vital Importance of Pure Water. Roman and Greek 

 writers more than two thousand years ago emphasized the 

 advantages of a pure water supply to a city. It is now 



