COUNTRY ROADS 



211 



The Macadam Road. In order to build a mac- 

 adam road, the roadbed is first given the slope de- 

 sired, so the water will quickly flow to the side 

 gutters. After this the bed is rolled hard with a 

 heavy roller; then it is covered with a layer of 

 coarse stone and rolled again. Then another layer 

 of finer crushed rock is spread on top and rolled 

 until it works in between the pieces of the coarser 

 stone. A layer of still finer crushed stone or sand 

 is next spread on and sprinkled with water, after 

 which it is rolled until a smooth, hard surface is 

 former!. Such roads are from six to twelve inches 



(ou.tesy of the National Paving Brick Mfg. Ass'n, Cleveland, Ohio 



Fig. 106, Layiufi a hrick road. 



thick. They cost from three thousand to six thou- 

 sand dollars per mile, but intelligent farmers realize 

 that such tax money is well invested. 



