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 231
Part F. Prof.WheatstonesPermutatingKey-boardand only-Instrumentat the date ofthe Partnership. PartG. Mr. Cooke and Prof. Wheatstone. Discharger and Secondary Circuit. April, 1837. Part H. Mr. Cooke. Second Galvanometer Telegraph, (with return wire) April, 1837, prior toPartnership. Drawing V. J.… … Part J. Messrs. Cooke and Wheatstones Patented Electric Telegraph. After Partnership.First Patent.June 12, 1837. Part K
Wheatstone, Charles, Sir, 1802-1875 · Telegraph
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