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The electric telegraph: was it invented by Professor Wheatston e? (1856)
Cooke, William Fothergill, 1806-1879 · London, Sold by W. H. Smith and Son · leaf 243
Cooke. First Mechanical Telegraph. March, 1836.Alarum. Cooke. SecondMechanicalTelegraph, February, 1837. Cooke. Experiments on theEscapement. August, 1830. … Third Patent. Jan. -21, 1840. Wlieatstone. ThirdMechanicalTelegi-aph. Autumn of 1839,Wheatstone, Charles, Sir, 1802-1875 · Telegraph
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