CHAPTER XIV 

 MACHINES AND WORK 



AGE OF MACHINERY 



IN the early days man did all his work by hand. The savage 

 learned to do work with a simple machine, such as a crooked stick. 

 From such a simple device as this man has gradually built up wonder- 

 ful machines to save labor and to produce many manufactured 



Levers cf the First 



Force 



Fulcrum 



Lever of isrciakss 



Pump Handle 



FIG. 370. 





products at less expense. Some machines have revolutionized modes 

 of living and methods of doing work. 



At one time negroes picked all the seeds from cotton by hand. 

 To-day the seeds are removed by machinery in a fraction of the time 

 required by hand labor in the earlier days. Weaving, sewing, wash- 

 ing and a great deal of the home work on which people spent many 



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