San Francisco : Architect and Engineer, Inc · leaf 476
c-tions werebuilt to theAlamedatube). Those about three hundred feet long are the moreeasily handled. They are square, largeenough for a double track, provision beingmade for drain and ventilating pipes, elec-tric wires, etc. Each section has a temporary bulkhead atthe ends andis launched asyou… … PICTURE SHOWS PROCESS C.^RRIED OUT IN BUILDING A PORTION OF THE NEW YORK SUBWAY THAT GOES UNDER THE HARLEM RIVER 101 102; ARCHITECT AND LNGINEER, August, 1929 ed by divers, into its proper place. Theends are fastened to the other sections. An-other and another section is lowered. Whenail are in…
Architecture · Building
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