A Story Outline of Evolution 



propelled by steam pressure on the blades or paddles instead 

 of water. 



Waterpower, or power produced by the force of grav- 

 ity in falling water, is the cheapest power yet known. 

 Unknown millions of horsepower in falling water are wasted 

 each day, and as yet it is only utilized in a small way. Its 

 force is being converted into power that can be transmitted 

 over long distances in the form of electrical currents and 

 applied to the uses of man in the form of light, heat and 

 power. The time is rapidly approaching when the power 

 of falling water will no longer be wasted, but will be fur- 

 ther utilized for the advancement of human progress. 



It has been seen that electrical energy can be generated 

 by artificial means and the electric current is generated by 

 dynamos driven by steam, gas, wind or waterpower. The 

 power for commercial uses is generated at a central plant 

 from which point it is transmitted over wires to the places 

 where it is consumed. The developments of high-voltage 

 power transmission have made it possible to convey electric 

 currents for great distances, and the development of the 

 steam engine has made it possible for the development of 

 electrical power wherever fuel and water may be had. It 

 may be said that the development of controlled electrical 

 power had its origin in steam, but electrical power is now 

 fast supplanting the power of steam for commercial uses. 

 These two agencies have been the means of developing the 

 industries of the world to their present state of development 

 and of changing the habits and customs and the manner of 

 living of a large number of the human family, for wherever 

 the steam engine and electricity are not found, people are 



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