282 THE COMING OF MAN 



How rapid man's progress has been in recent times will 

 be miderstood even by young children when they realize 

 that every mile of railroad in the world has been built 

 since 1814. The same thought may be carried into the 

 next lesson and applied to electrical inventions. 



Hand Work 



Encourage the pupils to think out for themselves what 

 they shall write on each of the topics suggested on page 4 

 of the leaflet. Let one member of the class tell the story 

 of Watt and the teakettle when the work is inspected the 

 following Sunday. 



OPENING TALK 



What moves a railroad train? What moves the engine? 

 Can you think of a world in which there are no trains of 

 cars? It is not so long ago that just such a world as that 

 was the one people had always known. The genius of 

 one man brought about this great change, and the sub- 

 stance that he used, water, was the one which has done 

 so much to make over our world. 



