7 NOTES ON DOCK'S AND DOCK CONSTRUCTION. 



concrete carried down about 5 feet into the sand. The stone 

 pitching in the face of the slope was 20 inches thick, set in 



SCALE 



FIG. 5G. 



Portland cement, bedded on, and well rammed into a layer 

 of puddled clay 1 foot thick, overlying the sand forming 

 the dam. 



