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Electrical telegraphy is point-to-point distance communicating via sending electric signals over wire, a system primarily used from the 1840s until the late 20th century. It was the first electrical telecommunications system and the most widely used of a number of early messaging systems called telegraphs, that were devised to send text messages more…
History, Commercial telegraphy & Telegraphy in war
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telegraph system first telegraphy used morse electric electrical code wire war systems current two messages early one message could cables
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| semaphores | instance of | the electrical telegraph superseded optical telegraph systems | 0.80 | text |
| becoming the standard way to send urgent messages | instance of | the electrical telegraph superseded optical telegraph systems | 0.80 | text |
| telegraph lines | instance of | was damaged by German bombing in 1941.Resistance movements in occupied Europe sabotaged communications facilities | 0.80 | text |
| forcing the Germans to use wireless telegraphy | instance of | was damaged by German bombing in 1941.Resistance movements in occupied Europe sabotaged communications facilities | 0.80 | text |
| which could then be intercepted by Britain | instance of | was damaged by German bombing in 1941.Resistance movements in occupied Europe sabotaged communications facilities | 0.80 | text |
| Electrical telegraph | related to Cooke and Wheatstone system | The | 0.60 | section |
| Electrical telegraph | related to Cooke and Wheatstone system | Cooke | 0.60 | section |
| Electrical telegraph | related to Cooke and Wheatstone system | Wheatstone | 0.60 | section |
| Electrical telegraph | related to Cooke and Wheatstone system | Euston | 0.60 | section |
| Electrical telegraph | related to Cooke and Wheatstone system | Camden Town | 0.60 | section |
| Electrical telegraph | related to Cooke and Wheatstone system | Robert Stephenson's London | 0.60 | section |
| Electrical telegraph | related to Cooke and Wheatstone system | Birmingham Railway | 0.60 | section |
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