210 



ELEMENTARY AGRICULTURE 



Fig. 105. Grading a country road. 



road. In communities near the coast, shells from 

 the sea are often used to surface roads and with 

 excellent results. 



Stone Roads. Probably the most popular mate- 

 rial is broken stone. Stone-bedded roads are said 

 to be macadamized, because a Scotch engineer 

 named Macadam was the tirst to use and urge this 

 kind of road. 



Thick Roman Roads. The old Eoman roads were 

 surfaced with stone, which was often several feet 

 thick and thus very expensive. Macadam believed 

 that a smaller amount of stone could be made to 

 serve just as well, and he urged that it would cost 

 much less. The world has come to see the correct- 

 ness of this plan, and now macadamized roads are 

 found everywhere. 



