[Sender frames, dial equipment.]
[General view of some of the dial equipment, Trafalgar Central Office.]
[District selector frame in a dial exchange.]
[Close up of a teletypewriter switchboard.]
Central Park & General Views [Central Park]
Bank of Manhattan Trust Co. General view of panels lighted.
Bank of Manhattan Trust Co. General view of north officer's room.
[Queensboro] Central Library. General office.
Central Park & General View [Central Park]
RCA Building. Post Office, general view.
Marconi, Wireless Telegraphing Apparatus.
Officer's apartments, Governors Island, N.Y. General view from dock.
[Intercom and office directory for the Lord Electric Company, 333 West 49th Street]
[Telegraph.]
[Morse Relay machine.]
New Central Park Reservoir - General View [Croton System.]
[Morse telegraph recorder.]