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Optical telegraph lines were installed by governments, often for a military purpose, and reserved for official use only. In many countries, this situation continued after the introduction of the electric telegraph. Starting in Germany and the UK, electric telegraph lines were installed by railway companies.
1872: Dallas, Texas reached by telegraph line. [115] October 1872: Australia is linked to the world system by a submarine telegraph line between Darwin and the Dutch East Indies (Indonesia). 1874: Thomas Edison sells his invention of quadruplex telegraph to Western Union for $10,000. It allows a total of four separate signals to be transmitted ...
Many electrical telegraph systems were invented that operated in different ways, but the ones that became widespread fit into two broad categories. First are the needle telegraphs, in which electric current sent down the telegraph line produces electromagnetic force to move a needle-shaped pointer into position over a printed list.
By the 1880s, telegraph lines crisscrossed the country, connecting practically all towns and cities of all sizes. The telegraph was used for everything from sending personal messages to conducting business deals and transmitting news stories. [14] According to business historian H. W. Brands, the telegraph separated communication from ...
Contemporary map of the 1858 transatlantic cable route. Transatlantic telegraph cables were undersea cables running under the Atlantic Ocean for telegraph communications. . Telegraphy is a largely obsolete form of communication, and the cables have long since been decommissioned, but telephone and data are still carried on other transatlantic telecommunication
These lines were used for reporting the arrival of commercial ships. The two lines were later linked with three additional stations to create possibly the only private telegraph network in the optical telegraph era. [100] The telegraph inspector for this network was Friedrich Clemens Gerke, who would later move to the Hamburg-Cuxhaven ...
Samuel Morse's first experimental line between Washington, D.C., and Baltimore—the Baltimore-Washington telegraph line—was demonstrated on May 24, 1844. [3] By 1850 there were lines covering most of the eastern states, [4] and a separate network of lines was soon constructed in the booming economy of California.
Until telegraph offices were opened directly at the racetrack, (Newmarket did not get one until 1860) a fast rider took the results to the nearest telegraph office. In places where the office was in line of sight , the results could be signalled to an observer with a telescope at the office but only in clear weather.