Bui. 373, U. S. Dept. of Agriculture. 
Plate IX. 
OPRRE 9230 
Fiq. 1.— Finished Brick Pavement Protected by Sand Covering. 
"••• 
_J 
Fig. 2.— Showing Properly Filled Grout Joints. 
EXPERIMENTAL ROAD AT CHEVY CHASE, MD. 
OPRRE 999! 
