﻿Bui. 23, U. S. Dept. of Agriculture. 



Plate IX. 



Fig. 1.— Experimental Road at Chevy Chase, Md. 



Finished pavement in service. 







Fig. 2.— Grout-Filled Brick Pavement, Having Longitudinal Joints in Center 

 and Occasional Transverse Joints Filled with Soft Filler. 



Unsightly appearance at right caused by widening roadway. 



