Bui. 249, U. S. Dept. of Agriculture. 



Plate V. 



Fig. 1.— Bituminous Wearing Surface in Fair Condition After About One 



Year's Service. 



Fig. 2.— Showing Unsatisfactory Condition of Bituminous Wearing Surface 

 After Less than One Year's Service. 



EXPERIMENTAL CONCRETE ROAD, CHEVY CHASE, MD. 



