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 235
Part K. Mr. CookesSecond Patent. April 18, 1838. Intermediate and Portable Telegraphs, and the Alarum now in use. … Drawing VII. Third Patent. Messrs. Wheatstone and Cooke. Jan. 21, 1840. Part L. Prof. Wheatstones Escapement Telegraph, with two wires. Part M. Mr. Cookes Escapement Telegraph, with three wires. Portable Telegrapli, without Battery. N.B.—The Diagrams in tliis Drawing are intended only to illustrate…
Wheatstone, Charles, Sir, 1802-1875 · Telegraph
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