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.]

15-17 East 16th Street. Mercantile Building.

Woolworth Building, switchboard.

Woolworth Building, feedwater filters and blowers.

Woolworth Building, switchboard.

Woolworth Building, rendering.

Woolworth Building, main entrance and stores.

Woolworth Building, vault.

Woolworth Building, engine room.

Woolworth Building, general exterior.

Woolworth Building, swimming tank.

Woolworth Building. Swimming tank.

Woolworth Building. Pump room.