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| Atlantic telegraph cable | |
|---|---|
| Name | Atlantic telegraph cable |
| Type | Submarine telegraph cable |
| First laid | 1858 |
| Length km | 3330 |
| Built by | Anglo-American Telegraph Company |
| Designer | Cyrus West Field |
| Fate | Replaced by later cables |
Atlantic telegraph cable
The Atlantic telegraph cable was a mid-19th century transoceanic telegraph project that connected Europe and North America by undersea communication line, enabling near-instantaneous messages between capitals such as London, Dublin, Paris, Washington, D.C., and New York City. Spearheaded by businessmen and engineers including Cyrus West Field, with participation from financiers and institutions like the Atlantic Telegraph Company, Atlantic Telegraph and Telephone Company predecessors, and industrial firms in England and United States, the venture intertwined with contemporary figures and entities such as Isambard Kingdom Brunel, William Thompson, 1st Baron Kelvin, Samuel Morse, Gutta-percha Company, Gutta-percha, and shipbuilders on the River Thames and Thames Ironworks. The cable’s first successful, if brief, operation in 1858 followed earlier proposals and experimental trials that engaged scientific societies and commercial consortia tied to places like Dublin Port and Cobh.
Early conceptual work drew on inventions and campaigns involving inventors and institutions such as Samuel Morse, Alexander Graham Bell antecedents in telegraphy, and demonstrations at bodies like the Royal Society and the Institution of Civil Engineers. Proposals were debated in financial circles in London Stock Exchange, Wall Street, and within firms such as Glass, Elliot & Co., R. S. Newall and Sons, and Henley & Co.; promoters included Cyrus West Field, Peter Cooper, and investors linked to the Great Exhibition milieu. Technical groundwork referenced materials research from the Gutta-percha Company and metallurgical studies associated with workshops in Sheffield and casting yards in Liverpool and Greenock. Diplomatic and commercial pressures from ports like Belfast, Queenstown (Cobh), and St. John, New Brunswick influenced route surveys conducted by naval officers and surveyors connected to the Royal Navy and the United States Navy.
Design choices adapted insulation, conductor, and armoring technologies developed by firms including Glass, Elliot & Co., R. S. Newall and Sons, and manufacturers around Manchester and Birmingham. Insulating materials like gutta-percha were sourced and processed in factories referenced by the Gutta-percha Company, while wire drawing and copper supply involved producers in Cornwall and Penzance as well as rolling mills near Sheffield and South Wales. Engineering design consulted scientists such as William Thomson, 1st Baron Kelvin (Lord Kelvin), who introduced theoretical models later published in communications with academics at Cambridge University and correspondents at Harvard University. Ship modifications were undertaken at Millwall yards and docks on the Thames for cable-carrying steamships like SS Great Eastern built by Robert Stephenson and Company and completing trials linked to pioneers such as Isambard Kingdom Brunel.
Initial attempts in the 1850s involved survey and laying expeditions departing from harbors including Valentia Island, Tralee Bay, Queenstown (Cobh), St. John, New Brunswick, and Newfoundland. Vessels engaged included cable steamers retrofitted in yards connected to Liverpool and the Port of London Authority; the successful 1858 operation prominently used the gigantic steamship SS Great Eastern, commanded by captains and engineers experienced with transatlantic crossings that had carried passengers on liners associated with companies like the Peninsular and Oriental Steam Navigation Company. Salvage and recovery missions later involved ships and crews from ports such as Belfast and Plymouth when cables broke and required operations influenced by naval charts from the Admiralty and hydrographic offices.
Laying and operating the cable exposed problems in insulation, signal attenuation, and electrical theory, prompting advances in telegraphy and physics pursued by researchers at Royal Institution, Trinity College Dublin, and laboratories at University of Glasgow. William Thomson’s work on resistance and capacitance led to inventions like the mirror galvanometer and influenced standards later adopted by bodies such as IEEE-era predecessors and professional societies including the Institution of Electrical Engineers. Practical innovations came from wire manufacturers in Coventry and armoring techniques from shipyards in Greenock; materials supplied by firms in Portsmouth and Bristol improved tensile strength. Failures due to mechanical strain, ocean currents catalogued by Matthew Fontaine Maury, and deep-sea pressure measurements from expeditions influenced later oceanography at institutions including the Smithsonian Institution and the United States Coast Survey.
The cable transformed diplomatic and commercial communications among centers like London, Paris, New York City, Washington, D.C., and Berlin, accelerating decision-making in enterprises such as shipping lines, commodity exchanges, and news agencies including the precursors to Reuters and syndicates operating in the Times (London). Financial markets on London Stock Exchange and New York Stock Exchange adapted to near-instant information flows, affecting merchant houses, insurers such as firms in Lloyd's of London, and colonial administrations in places like India and Canada. Politically, policymakers in cabinets of figures tied to the Crimean War aftermath and ministries across Europe and North America used telegraph updates in diplomacy and crisis management, intersecting with parliamentary debates at Westminster and congressional sessions in United States Congress.
After the initial cable, multiple successive transatlantic links were laid by corporations including Anglo-American consortia and telegraph companies with participation from firms in Norway, France, and Germany, leading to networks that connected via hubs in Lisbon, Plymouth (England), Newfoundland, and Nova Scotia. The project catalyzed advances in ocean engineering, submarine cable technology, and international communication standards that influenced later infrastructures like transoceanic telephone cables, fiber-optic projects studied at Bell Labs and institutions such as MIT and Caltech. Its legacy endures in museums and archives at places including Science Museum, London, National Maritime Museum, and collections at Library of Congress and in the historiography curated by scholars affiliated with Oxford University and Harvard University.