Communications, Marconi's Wireless Telegraphing Apparatus.

Communications, Marconi, Wireless Telegraph Inc.

Communications, Telephone Exchange.

Communications, Telephone Exchange.

Communications, Telephone Exchange.

Communications, Telephone Exchange.

Chief, and Assistant, Engineers, of the New York Fire Department, 1857 & 8

[Telegraph.]

Communications, Telephone Exchange.

[Teletypewriter switchboard.]

[Woman at a telegraph machine.]

[Morse telegraph recorder.]

[Morse Relay machine.]

[Close up of a teletypewriter switchboard.]

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

[Man at switchboard.]

Communications, Telephone Exchange.

[Telegrams sent and received today.]

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

[Sender frames, dial equipment.]