[Tunnel construction.]
[North tunnel shield.]
[Unloading a truck.]
[Unloading.]
[Towing New York River Shaft Ciasson from Staten Island Shipbuilding Company's yard.]
Midtown Tunnel under Hudson River, April 24, 1935
Subways, Fourteenth Street Cut, Cast Iron Ring, Section North Tube Looking West, #18.
[Placing side ring "upper half".]
[Holland Tunnel.]
[McAdoo Tunnel.]
Automobile trucks.
Ring #97 Northbound Express tunnel.
Original Exhibits of Rapid Transit Subway Construction Company, Plaintiff [Excavating a tunnel; subway construction.]
Building the McAdoo Tunnel, Under the Hudson River, New York.
[Workers unloading boat.]
[Construction of the Pennsylvania Railroad tunnels under the Hudson.]
Rondout Pressure Tunnel Showing Partial and Total Concrete Lining [Catskill System.]