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ArtiFacts heet: The Telegraph Key Early forms of long-distance communication were based primarily on sending codes and symbols using visual indicators. Examples of this include smoke signals and semaphore towers. One of the principal disadvantages of this method Artifact Details was that it required clear line-of-sight, which could be affected by things such as Telegraph Key, 1849 – 1869 poor weather, as well as natural and man-made structures. Manufacturer: Unknown Artifact no. 1975.0035.001 The discovery of electricity made it possible to transmit messages along electrical lines. This spurred considerable research, culminating in the invention of the A telegraph key is used to transmit electric telegraph. The electric telegraph was more versatile and reliable than messages in an electrical telegraph. visual indicators. It also provided instantaneous contact, revolutionizing long- Telegraph keys come in many distance communications. different models. The one pictured below is called a Camelback, because The invention of the electric telegraph in the 1830s is attributed to two groups of of the hump-shaped look of the lever. researchers: Sir William Cooke and Sir Charles Wheatstone in England; and It is made out of brass and was used Samuel Morse, Leonard Gale and Alfred Vail in the U.S. in a telegraph office in Metcalfe, Ontario, which opened in 1870 and In Canada, development of the electric telegraph closely followed developments in closed in 1912. the U.S., with the first telegraph lines laid in 1847. The telegraph remained popular until the 1920s when its use started to decline due to the increased usage of the telephone. Many artifacts related to telegraphy, such as the telegraph key pictured on this page, can be found in the collection of the Canadian Science and Technology Museum Corporation: http://techno-science.ca/en/collection-research.php. Fun Fact Samuel Morse wanted to sell the electric telegraph to the U.S. government. The government declined, and subsequent development was handled by private industries. .

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THE CABLE THAT WIRED the WORLD 41 the CABLE THAT WIRED the WORLD Today We Take Global Attractive Proposition to the Cotton Communications for Granted
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