Editing Electrical telegraph (section)

===Foy–Breguet system===
{{Main|Foy–Breguet telegraph}}
[[File:Foy-Breguet telegraph display.jpg|left|thumb|[[Foy–Breguet telegraph]] displaying the letter "Q"]]
France was slow to adopt the electrical telegraph, because of the extensive [[optical telegraph]] system built during the [[Napoleonic era]]. There was also serious concern that an electrical telegraph could be quickly put out of action by enemy saboteurs, something that was much more difficult to do with optical telegraphs which had no exposed hardware between stations. The [[Foy-Breguet telegraph]] was eventually adopted. This was a two-needle system using two signal wires but displayed in a uniquely different way to other needle telegraphs. The needles made symbols similar to the [[Claude Chappe|Chappe]] optical system symbols, making it more familiar to the telegraph operators. The optical system was decommissioned starting in 1846, but not completely until 1855. In that year the Foy-Breguet system was replaced with the Morse system.<ref>Holzmann & Pehrson, pp. 93–94</ref>