| 11. | He also worked on the development of the electric telegraph.
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| 12. | With the emergence of the electric telegraph, slowly the Chappe telegraph ended in 1852.
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| 13. | It was single line broad gauge throughout, with the electric telegraph installed throughout the line.
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| 14. | The electric telegraph, in addition to visual signaling, became a Signal Corps responsibility in 1867.
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| 15. | In September 1845 the financier John Lewis Ricardo and Cooke formed the Electric Telegraph Company.
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| 16. | In 1846, the government of France committed to a new system of electric telegraph lines.
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| 17. | The optical telegraph line was discontinued with the introduction of the electric telegraph line in 1852.
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| 18. | However, a description of Tawell was sent to London by electric telegraph and he was captured.
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| 19. | In England, the telegraph was connected to Whitehaven and the circuits of the Electric Telegraph Company.
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| 20. | His interest in the subject led him to make electrical inventions including an improved electric telegraph.
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