ried, to allow of free navigation, as the traffic at this Since the construction of the Broadway tunnel the quite thin, and is called the hood. Arranged around point is very great, and the current very swift, viz., the main walls of the cylinder and longitudinal there- Beach hydraulic shield has… … inches, with flanges ?lg. 1.—Sectional elevation and plan of tmrael; A, panip shaft, B, brick air shafts, C, cuttings. DD, bulkheads Fig. 2.—Cross section of tnnnel and river. Fig. 3.— Jersey City, N. J. Map showing location. Fig. 4.—Flan of Pt. Huron andSamia, showing position of tonnel. Fig. 5.-…
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