[Radio transmitting station--Western Electric Company.]

[General view of sender frames in a panel dial central office.]

Aerial on Roof of Aeolian Bldg. from 501 Fifth Avenue.

[Overseas switchboard at 32 Avenue of the Americas.]

[Switchboard at the long distance headquarters of the American Telephone and Telegraph Company.]

[Final tests on raidio broadcasting transmitter--Madison Square Garden.]

[Press photo of the model of CBS's annex studio.]

Marconi, Wireless Telegraphing Apparatus.

[Traffic tower on 5th Avenue and 58th Street.]

[General view of some of the dial equipment, Trafalgar Central Office.]

[Woman at a telegraph machine.]

[Morse Relay machine.]

[Telegraph.]

[Morse telegraph recorder.]

[Teletypewriter switchboard.]

[Communication engine room.]

[Morse recorder made by Samuel F. B. Morse.]

[Man at switchboard.]

[Intercom and office directory for the Lord Electric Company, 333 West 49th Street]

[Close up of a teletypewriter switchboard.]