236 GENERAL SCIENCE 



a dry season there will be more water to flow into the 

 creeks or rivers from properly cultivated fields than from 

 forested regions, and when rain comes the cultivated fields 

 will be moistened sooner than the forested parts and so 

 the streams will again receive water from the cultivated 

 fields before they will from the woods. 



There is practically no effect upon the rainfall, floods, 

 or water supply when a forested region is changed to a 

 properly cultivated agricultural section. Careless farm- 

 ing, of course, results in the loss of much that is useful. 



QUESTIONS AND EXERCISES 



1. What is the source of water for your home? Is it free 

 from typhoid or other disease germs? 



2. How do you purify your drinking water? Do you use the 

 best method? 



3. Make a careful study of water supply of your town or 

 city in order to learn if any dangerous chemicals or disease 

 germs are in it. 



4. What can you do to help get purer water? 



5. What method is used to get the water into your home? 



6. Does the water always flow with the same force? Why? 



7. If a reservoir is 150 feet higher than your home, what is 

 the water pressure at the spickets? 



8. Determine the cost per gallon of water which you use. 

 (Obtain the necessary facts from your water company.) 



9. How do forests affect the water supply of your locality? 



10. Visit some creeks to see if they have been affected by 

 the removal of the forests. 



11. How can farmers remedy the bad effects which come from 

 the removal of forests? 



