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

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


[People observing telephone operators.]

[People observing telephone operators.]


[Telephone operators.]

[Telephone operators.]


[Communication engine room.]

[Communication engine room.]


[Woman at a telegraph machine.]

[Woman at a telegraph machine.]


[Man at switchboard.]

[Man at switchboard.]


[Morse telegraph recorder.]

[Morse telegraph recorder.]


[Telegrams sent and received today.]

[Telegrams sent and received today.]


[DeForest Wireless station.]

[DeForest Wireless station.]


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

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


[District selector frame in a dial exchange.]

[District selector frame in a dial exchange.]


[Sender frames, dial equipment.]

[Sender frames, dial equipment.]


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

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


[Teletypewriter switchboard.]

[Teletypewriter switchboard.]


[Telephone operators.]

[Telephone operators.]


[Close up of a teletypewriter switchboard.]

[Close up of a teletypewriter switchboard.]


[Early types of switchboards.]

[Early types of switchboards.]


[Early types of switchboards, Old Spring Exchange.]

[Early types of switchboards, Old Spring Exchange.]


[Morse Relay machine.]

[Morse Relay machine.]


[Telephone operators.]

[Telephone operators.]


[H.L. Horton & Co. Interior, stockboard.]

[H.L. Horton & Co. Interior, stockboard.]


[War emergency radio service.]

[War emergency radio service.]


[New York City Telephone Exchange.]

[New York City Telephone Exchange.]


[Radio transmitting station--Western Electric Company.]

[Radio transmitting station--Western Electric Company.]


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

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


[Overseas switchboard at 32 Avenue of the Americas.]

[Overseas switchboard at 32 Avenue of the Americas.]


[Tuning the CBS antenna on the Solmon Tower.]

[Tuning the CBS antenna on the Solmon Tower.]


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

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


Marconi, Wireless Telegraphing.

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.

French Line, S.S. "Paris", Pier 57 North River, Interior, Radio Room.


Ships, United Fruit Line, S.S. "Pastores".

Ships, United Fruit Line, S.S. "Pastores".

A communications office aboard the S.S. "Pastores".

Marconi, Wireless Telegraphing.

Marconi, Wireless Telegraphing.


Marconi, Wireless Telegraph Inc.

Marconi, Wireless Telegraph Inc.


Ships, United Fruit Line, S.S. "Pastores".

Ships, United Fruit Line, S.S. "Pastores".

A communications office aboard the S.S. "Pastores".

Communications, Marconi, Wireless Telegraph Inc.

Communications, Marconi, Wireless Telegraph Inc.

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.

French Line, S.S. "Paris", Pier 57 North River, Interior, Radio Room.


[Equitable Life Assurance population display at the 1964 World's Fair.]

[Equitable Life Assurance population display at the 1964 World's Fair.]


[Equitable Life Assurance population display at the 1964 World's Fair.]

[Equitable Life Assurance population display at the 1964 World's Fair.]


[Equitable Life Assurance population display at the 1964 World's Fair.]

[Equitable Life Assurance population display at the 1964 World's Fair.]


[Equitable Life Assurance population display at the 1964 World's Fair.]

[Equitable Life Assurance population display at the 1964 World's Fair.]


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

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


Telephone, New York Telephone Co. Exchanges.

Telephone, New York Telephone Co. Exchanges.


Telephone, New York Telephone Co. Exchanges.

Telephone, New York Telephone Co. Exchanges.


[Marconi, Wireless Telegraphing.]

[Marconi, Wireless Telegraphing.]

Marconi and his first wireless telegraph.

Marconi, Wireless Telegraphing Apparatus.

Marconi, Wireless Telegraphing Apparatus.

Wireless telegraph apparatus.

Marconi, Wireless Telegraphing Apparatus.

Marconi, Wireless Telegraphing Apparatus.

Wireless telegraph apparatus.

N.Y. Cruiser--Mast 150 Ft. High, Wireless Telegraphing, Where Messages Are Sent to B.S. Mass.

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.

Marconi, Wireless Telegraphing Apparatus.

Marconi, Wireless Telegraphing Apparatus.

Wireless telegraph apparatus.

Wireless Telegraphing--N.Y. Cruiser--Mast 150 Ft. High--Where Messages Are Sent to B.S. Mass.

Wireless Telegraphing--N.Y. Cruiser--Mast 150 Ft. High--Where Messages Are Sent to B.S. Mass.


The Simen Automatic Signal System.

The Simen Automatic Signal System.


Telephone, New York Telephone Co. Exchanges.

Telephone, New York Telephone Co. Exchanges.


N.Y. Cruiser--Mast 150 Ft. High, Wireless Telegraphing, Where Messages Are Sent to B.S. Mass.

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.

Wireless Telegraphing--N.Y. Cruiser--Mast 150 Ft. High--Where Messages Are Sent to B.S. Mass.

The ship from which Marconi's wireless signal was sent to Massachusetts.

Communications, Marconi's Wireless Telegraphing Apparatus.

Communications, Marconi's Wireless Telegraphing Apparatus.

Marconi's first wireless telegraph on a boat in New York Harbor.

Wireless Telegraphing--N.Y. Cruiser--Mast 150 Ft. High--Where Messages Are Sent to B.S. Mass.

Wireless Telegraphing--N.Y. Cruiser--Mast 150 Ft. High--Where Messages Are Sent to B.S. Mass.

The ship from which Marconi's wireless signal was sent to Massachusetts.

Marconi, Wireless Telegraphing Apparatus.

Marconi, Wireless Telegraphing Apparatus.

Wireless telegraph apparatus.

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