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h. A surface of 1,120 acres is protected. It is 133 yards wide at bottom, 15 at top: a set-off 22 yards wide forms a foreshore on the sea side. The upper portion is revetted with masonry laid in Roman cement on both faces and crown. The hight of the latter is 2 feet above high-water spring-tides. 4,105,920 tons of stone were used in the construction. Cost, $7,500,--000. Delaware Breakwater is situated just inside of Cape Henlopen, the southwestern point of land at the entrance of Delaware Bay, and was intended to form a harbor of refuge during storms for vessels passing along the coast. The work was commenced in 1829. It consists of two parts, the breakwater proper and the ice-breaker. The former is 1,203 yards long, extending in an E. S.E., and W. N.W. direction. The ice-breaker is designed to protect the harbor from floating ice brought down by the Delaware River, is 500 yards long, and lies in an E. by N. and W. by S. direction, having a passage of 350 yards between it