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

Woolworth Building, air cushions from center south.

Woolworth Building, air cushion #15, 16, 17 and 18.

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

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

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

Woolworth Building. Air Compressor [Construction zone.]

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

Woolworth Building, switchboard.

Woolworth Building, boiler room.

Woolworth Building, engine room.

Woolworth Building. Swimming tank.

Woolworth Building. Pump room.

Woolworth Building. Boiler room.

Woolworth Building

Woolworth Building, vault.

Woolworth Building, switchboard.

Woolworth Building, Broadway looking south.

Woolworth Building, engine room, filters.

Woolworth Building. Hall from entrance.