Interior room of the Electric Telegraph ?

Interior room of the Electric Telegraph Office at Charing Cross, London. British telegraph equipment was based on the Cooke-Wheatstone patent, the clock-like devices along the walls, in which the receiver pointed to the letters on a dial, which spared ope

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Charing Cooke Devices Dial Occupational Operators Patent Pointed Receiver Spared Telegraphy Wheatstone

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