178 OUR USE OF THE LAND 



power flows from the nation to the region and back to the 

 nation again. This process is based on the theory that all the 

 voters will know enough about the problems like range control 

 to vote wisely when decisions are to be made about them. 



PROJECTS 



1. Take a map of the United States. Mark the one hundredth 

 meridian. Locate on the map Fargo, North Dakota, Aberdeen, 

 South Dakota, North Platte, Nebraska, Garden City, Kansas, 

 Amarillo, Texas, and Laredo, Texas. Now draw a line through 

 these towns from the Canadian border to the Mexican border. 

 This is approximately the twenty-inch rainfall line. East of 

 this line more than twenty inches of rain falls every year. West 

 of this line less than twenty inches of rain falls every year. 

 Now draw another line from the Canadian border to the 

 Mexican border along the summit of the Sierras. Generally 

 speaking, east of this line the rainfall is less than twenty inches, 

 and west of it it is more than twenty inches. Between these 

 two lines lies the range country. 



From the National Resources Board Report look up the map 

 showing irrigation districts and that showing range types. 

 Mark these on your map. If you can get it, look on page 30 

 of Walter Prescott Webb's Great Plains and mark on your 

 map the eastern boundary of short grass and the western bound" 

 aries of sagebrush and creosotebrush. Your map will now 

 show the boundaries of the range and the most important re' 

 sources of the range, grass and water. 



2. A lives on a small stream. He has run this stream into a 

 large valley which he has dammed up at one end to make into 

 a lake along which he expects to build a summer house. Other 

 people further down the stream protest and the courts say that 

 A cannot take the water of the stream for his own use. B 



