[Sender frames, dial equipment.]
[General view of some of the dial equipment, Trafalgar Central Office.]
[District selector frame in a dial exchange.]
Central Park & General Views [Central Park]
[Close up of a teletypewriter switchboard.]
[Woman at a telegraph machine.]
Central Park & General View [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.
[Queensboro] Central Library. General office.
[Telegraph.]
[Intercom and office directory for the Lord Electric Company, 333 West 49th Street]
Marconi, Wireless Telegraphing Apparatus.
General Post Office.
[Morse Relay machine.]