Telegram
A telegram (Greek tele: distant and gramma: letter) is a written message transmitted by using an electric device. The message was carried along wires, and the text written or printed and delivered by hand or teleprinter.
Telegrams were very widely used, because private telephones were not usual. Nowadays they are not useful because most people have private telephones and the use of e-mail. The idea was developed by the British Post Office as a service for urgent letters.
Telegram Media
Replica of a Chappe telegraph on the Litermont near Nalbach, Germany
Great Wall of China near Jinshanling
Schematic of a Prussian optical telegraph (or semaphore) tower, c. 1835
19th-century demonstration of the semaphore
Cooke and Wheatstone's five-needle, six-wire telegraph (1837)
A Morse key (c. 1900)
An early Cooke and Wheatstone double-needle railway telegraph instrument at the National Railway Museum
A block signalling instrument as used in Britain in the 20th century
Australian troops using a Mance mk.V heliograph in the Western Desert in November 1940
US Forest Service lookout using a Colomb shutter type heliograph in 1912 at the end of a telephone line
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Related pages
Other websites
The dictionary definition of telegram at Wiktionary
