Shaft No. 4, Steinway Tunnel.

[The working chamber of the New York River Shaft Caisson.]

[Towing New York River Shaft Ciasson from Staten Island Shipbuilding Company's yard.]

[Shaft of Ashokan Water Tunnel.]

Typical Pressure Tunnel Construction Shaft [Catskill System.]

Midtown Tunnel under Hudson River, April 24, 1935

Subways, Fourteenth Street Cut for Subway, Rock Cut Looking West, Shaft 1.

[Launching New York River Shaft Caisson.]

[City Tunnel No. 2.]

[Digging subway tube under East River for Queensboro Subway.]

Untitled [Tenement shaft.]

[Queens Midtown Tunnel.]

Gun Hill Road. Base Hospital #1. Interior of ward showing construction, view #9A. Taken for Captain Noble.

The Holland Tunnel

The Queens Midtown Tunnel Opening Ceremonies

Original Exhibits of Rapid Transit Subway Construction Company, Plaintiff [Excavating a tunnel; subway construction.]

[Digging Shaft, Summit, Pa.]

[New York City Skyline.]

Stone group #33, general exterior #9. [Two stone houses.]

[The Holland Tunnel.]