[Tunnel construction.]
[North tunnel shield.]
[Constructing the McAdoo Tunnel.]
[Holland Tunnel.]
Original Exhibits of Rapid Transit Subway Construction Company, Plaintiff [Excavating a tunnel; subway construction.]
Midtown Tunnel under Hudson River, April 24, 1935
Queensboro Tunnel.
[Construction of the Pennsylvania Railroad tunnels under the Hudson.]
[McAdoo Tunnel.]
[Tentatively, east 50th Street, view of construction site.]
[Central Park.]
[Unloading ring from truck.]
[Construction in Central Park.]
Building the McAdoo Tunnel, Under the Hudson River, New York.
Southbound express tunnel.