[Subway construction.]

[Subway construction.]

[Subway construction.]

[Construction of the 14th Street subway.]

[Subway construction at Broadway, north from 100th Street.]

[Subway construction.]

[Subway construction on Broadway near 135th Street.]

[Subway from library.]

Sixth Avenue subway construction.

[Constructing the subway, Queens.]

[Subway from library.]

Subway Construction.

[Constructing the subway in Queens.]

Subway Construction.

[Subway construction.]

6th Avenue Subway Construction, 14th Street.

Subway Construction.

Subway Construction.

Subway Construction.

6th Avenue Subway Construction, 13th Street.