Woolworth Building, air cushions #7-10.

Woolworth Building, air cushions from center south.

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

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

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

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

Woolworth Building. Air Compressor [Construction zone.]

Woolworth Building, vault.

Woolworth Building, Under 5 Barclay [Construction zone.]

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

Woolworth Building, boiler room.

Woolworth Building, engine room.

Woolworth Building. Engine room.

Woolworth Building. Grand staircase.

Woolworth Building. Grand staircase.

Woolworth Building. Safe deposit vault.

Woolworth Building, boiler room looking north.

Woolworth Building, shoring N.W. corner.

Woolworth Building, exterior from N.W.

Woolworth Building. Grille room looking West.