LABORATORY MANUAL 31 



(9) Are there islands? If so, were they formed by deposit 

 by the stream? 



(10) Has the stream or its valley been altered in any way 

 by man? 



RESULTS 



Write, in descriptive form, an account of this stream so 

 far as your notes give you information. Do not try to 

 follow the exact order of the points called for in your notes. 



EXERCISE XXIII (Textbook 272) 



THE WATER SUPPLY OF A CITY OR TOWN 



MATERIALS: The annual report of a city or town from 

 the Board of Water Commissioners or the Water Depart- 

 ment, annual report of the Board of Health, daily news- 

 papers. 



(1) Where does the water supply of your city or town 

 come from? 



(2) How is the business of supplying the water attended 

 to? 



(3) How is the expense paid? 



(4) How is the amount of water used in each building 

 ascertained? 



(5) What is the price of water to the consumer? 



(6) What are the uses of water besides those of the house- 

 hold? 



(7) The average amount of water used per person is greater 

 than it was ten years ago. Give some reasons. 



(8) (a) What is a distributing reservoir? (6) A water 

 main? (c) A gate in a water main? 



(9) If a distributing reservoir is 250 ft. above sea level, 

 how much fall is there from it to a part of the town whose 

 level is 60 ft.? 



(10) What advantage would there be in a greater fall? 



