Woolworth Building, cellar, air cushion #15-18.

Woolworth Building, air cushion #14, 15 and 16.

Woolworth Building, air cushions #7-10.

Woolworth Building, air cushions #3, 4 and 5.

Woolworth Building, air cushions from center south.

Woolworth Building, air cushions, from north end looking south.

Woolworth Building. Air Compressor [Construction zone.]

Woolworth Building, Caisson, Air Pressure Station [Construction zone.]

Woolworth Building, switchboard.

Woolworth Building, feedwater filters and blowers.

Woolworth Building, vault.

Woolworth Building, swimming tank.

Woolworth Building, engine room.

Woolworth Building, general exterior.

Woolworth Building, boiler room.

Woolworth Building, engine room.

Woolworth Building. Engine room.

Woolworth Building. Grand staircase.

Woolworth Building. Grand staircase.

Woolworth Building. Corridor on 24th Floor, Woolworth offices.