[Sender frames, dial equipment.]
[General view of some of the dial equipment, Trafalgar Central Office.]
[District selector frame in a dial exchange.]
[Woman at a telegraph machine.]
Central Park & General Views [Central Park]
Bank of Manhattan Trust Co. General view of north officer's room.
RCA Building. Post Office, general view.
Bank of Manhattan Trust Co. General view of panels lighted.
Marconi, Wireless Telegraphing Apparatus.
[Queensboro] Central Library. General office.
[Morse telegraph recorder.]
72nd Street and Ridge Boulevard. Flagg Court Apartments. Interior, office, detail of renting unit board
[Morse Relay machine.]
[Teletypewriter switchboard.]
Central Park & General View [Central Park]
[Overseas switchboard at 32 Avenue of the Americas.]