WORK 171 



across the ocean. Land must be plowed, crops planted, ditches 

 dug, the floors scrubbed, the lawns mowed. Work must be done 

 every day in every inhabited part of the world, and the work 

 is very important to each one of us. If the land were not 

 plowed and planted and the crops harvested, there would be 

 little for us to eat. If the trains and ships did not carry food 

 for our great cities, many of us would starve to death, as has 



FIG. 87. The Niagara gorge 



Back of the bridge, in the center of the picture, may be seen some of the power 

 plants using water from the river. Much of the energy is wasted 



happened in countries like India, where transportation facili- 

 ties are not equal to the task of properly distributing the 

 food that is produced in the country. 



It is not possible for us to accomplish all these .tasks by 

 our unaided strength, and we therefore use various machines 

 to assist us or to utilize the forces of nature. One of the great 

 differences between savage and civilized men lies in the ability 



