THE POLK SYSTEM 



Concrete Its Value 



THE modern farmer would no more think of trying" to get along 

 without concrete than the modern manufacturer would think 

 of dispensing with electricity or steam. Not many years ago con- 

 crete was an unknown quantity, the engineer and builder didn't 

 know whether to use it or not. Today no- man builds that does not 

 consider concrete, and no wise man builds that does not use it. 

 Concrete has not only revolutionized our recent ideas of building; 

 it has exploded them. Concrete is supplanting stone, brick, iron, 

 and wood. The farmer, who some not over-wise people say is always 





Silo of Mr. C. W. Broughton, McGirr, III., diameter 16 feet, height 45 feet. 

 Built by Polk System. 



backward about taking up new ideas, has been decidedly in the 

 foreground here, and it is building "for keeps" in concrete, while 

 his less knowing city cousin "burns wood." 



Why has concrete come to the front so rapidly? There are many 

 reasons, but one is, sufficient. IT IS EVERLASTING. It has 

 a cumulative strength and a 100 per cent, plus efficiency. The 



''They are not built of pieces and they 

 cannot go to pieces. " 



