![](http://www.alamy.com/thumbs/6/6C9355D6-42C3-454C-A51C-E8EE9034F34D/HHG6RG.jpg)
Front elevation of Cooke and Wheatstone's single needle telegraph.
Front elevation of Cooke and Wheatstone's single needle telegraph.
Size: 7086px × 8879px
Location:
Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
Model Released: No
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