[Subway from library.]
[Subway construction.]
Subways
Subway
[Subway Excavation]
Subway Construction.
[Construction of the 14th Street subway.]
[Subway construction at Broadway, north from 100th Street.]
[Entrance of subway, looking south from 123rd Street.]
Extension of the 6th Avenue Subway from Carmine Street , looking south]
[Constructing the subway in Queens.]