Bui. 373, U. S. Dept of Agriculture. 



Plate IX. 



O.'h-HE 92J0 



FiQ. 1.— Finished Brick Pavement Protected by Sand Covering. 



Fig. 2.— Showing Properly Filled Grout Joints. 

 EXPERIMENTAL ROAD AT CHEVY CHASE, MD. 



OPHHE aasi 



