Starting in the 1840s, the electric telegraph began to link together the world's cities. Initially, this was only over land or bridgeable rivers, but soon, efforts were made to pass cables underwater, at least over short distances. Intercontinental cables remained a dream until the arrival of Cyrus Field, an American who put together a company to bridge the North Atlantic. His first attempt, laid by American and British warships in 1857, failed when the cable snapped 300 miles out from Ireland, but he raised more money and tried again the next year. That cable was more successful, in that it did provide a telegraph link between the two countries, but it was so noisy that it would take hours to send a message. To make matters worse, construction and operational defects meant that it failed completely in only a month.

Inside a cable tank
The cable's failure provoked widespread skepticism, a matter made worse by the failure of an even more expensive cable through the Red Sea to India, and a commission of inquiry was set up to investigate the problems of submarine cables. The commission, a joint effort of the British government and the Atlantic Telegraph Company whose members included physicist Charles Wheatstone, published a 560 page report that confirmed that the problems with the cable were ones of design and operation, and that the concept itself was not inherently flawed. Unfortunately, it would take many years for Field to raise the money necessary to try again. Pretty much everyone in his own country was distracted for some reason, and the British ended up providing the lion's share of the money for the second attempt. This time, there was no rush to prepare the cable, and samples were made and thoroughly tested, with the final version being over twice as strong and three times as conductive as the first cable. Read more...





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