498 MAGNETISM AND ELECTRICITY 



coils of wire. The coils are revolved by means of water 

 power, steam power, or any other available power. 



The electricity that is generated by the dynamo is easily 

 transferred by wires to a long distance from the point where 

 it is generated. Los Angeles uses electrical power which is 

 generated in the mountains over 300 miles away. The 



Courtesy of Chicago, Milwaukee and St. Paul Railway 

 POWER PLANT AND DAM OF THE MONTANA POWER COMPANY 



This plant at Great Falls, Montana, transforms energy of running water into 

 electrical energy by which trains are operated over 641 miles of track. 



energy of the water falling at Niagara is transformed . into 

 electrical energy which is utilized for transportation and 

 for industrial purposes at a distance of nearly 200 miles. 

 The location of the power no longer determines the site of a 

 'factory. The factory may be located at the most con- 

 venient place possible and be run by power which is trans- 

 mitted from almost inaccessible mountain retreats. 



