^mntiiit ^mtxum. September 30, 1876.] 215 were begun early In November, and con- advance more rapidly than the demoli- … Fig. 3.—GKOUND PLAN OF THE WOKK AT HELL GATE. the reef. It is hence calculated that the work. Fig. 3, gives an excellent idea of the extent of the excavation, which is exterior effect, except an agitation oi the water, will be small. own plan for blowing up the reef at Hallett's Point, which now…
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