[General view of sender frames in a panel dial central office.]
[People observing telephone operators.]
[Communication engine room.]
[Woman at a telegraph machine.]
[Man at switchboard.]
[Morse telegraph recorder.]
[Telegrams sent and received today.]
[DeForest Wireless station.]
[Morse recorder made by Samuel F. B. Morse.]
[District selector frame in a dial exchange.]
[Sender frames, dial equipment.]
[General view of some of the dial equipment, Trafalgar Central Office.]
[Close up of a teletypewriter switchboard.]
[Early types of switchboards.]
[Early types of switchboards, Old Spring Exchange.]
[Morse Relay machine.]
[H.L. Horton & Co. Interior, stockboard.]
[War emergency radio service.]
[New York City Telephone Exchange.]
[Radio transmitting station--Western Electric Company.]
[Switchboard at the long distance headquarters of the American Telephone and Telegraph Company.]
[Overseas switchboard at 32 Avenue of the Americas.]
[Tuning the CBS antenna on the Solmon Tower.]
[Final tests on raidio broadcasting transmitter--Madison Square Garden.]
Marconi, Wireless Telegraphing.
Marconi and his first wireless telegraph on a boat in New York Harbor.
French Line, S.S. "Paris", Pier 57 North River, Interior, Radio Room.
Ships, United Fruit Line, S.S. "Pastores".
A communications office aboard the S.S. "Pastores".
Marconi, Wireless Telegraph Inc.
Communications, Marconi, Wireless Telegraph Inc.
[Equitable Life Assurance population display at the 1964 World's Fair.]
[Intercom and office directory for the Lord Electric Company, 333 West 49th Street]
Telephone, New York Telephone Co. Exchanges.
[Marconi, Wireless Telegraphing.]
Marconi and his first wireless telegraph.
Marconi, Wireless Telegraphing Apparatus.
Wireless telegraph apparatus.
N.Y. Cruiser--Mast 150 Ft. High, Wireless Telegraphing, Where Messages Are Sent to B.S. Mass.
The ship from which Marconi's wireless signal was sent to Massachusetts.
Wireless Telegraphing--N.Y. Cruiser--Mast 150 Ft. High--Where Messages Are Sent to B.S. Mass.
The Simen Automatic Signal System.
Communications, Marconi's Wireless Telegraphing Apparatus.
Marconi's first wireless telegraph on a boat in New York Harbor.