CHAPTER XII 



IRON 



(Iron = Fe) 



Introduction. Of all the metals, iron is by far the 

 most useful to the human race. 



Railroads cover the surface of the earth with a net- 

 work of iron rails over which iron engines draw iron 

 cars. The automobile, the bicycle, the buggy, the ocean 



Fig-. 35. Steel is used extensively in modern building. 



liner, and the aeroplane, all contain more or less iron 

 in their construction. Even in riding horseback one is 

 unable to escape the accompaniment of iron, for the 

 horse is shod with iron shoes and the bridle and saddle 



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