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  2. Timeline of North American telegraphy - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_North_American...

    The timeline of North American telegraphy is a chronology of notable events in the history of the electric telegraphy in the United States and Canada, including the rapid spread of telegraphic communications starting from 1844 and completion of the first transcontinental telegraph line in 1861.

  3. Telegraphy in the United States - Wikipedia

    en.wikipedia.org/wiki/Telegraphy_in_the_United...

    The Telegraph: A History of Morse's Invention and Its Predecessors in the United States (McFarland, 2003). online; Downey, Greg. "Telegraph messenger boys: crossing the borders between history of technology and human geography." Professional Geographer 55.2 (2003): 134-145. online

  4. Timeline of the telephone - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_the_telephone

    10 September 1879: Connolly and McTighe patent a "dial" telephone exchange (limited in the number of lines to the number of positions on the dial.). 1879: The International Bell Telephone Company (IBTC) of Brussels, Belgium was founded by Bell Telephone Company president Gardiner Greene Hubbard , initially to sell imported telephones and ...

  5. Telegraphy - Wikipedia

    en.wikipedia.org/wiki/Telegraphy

    The word telegraph alone generally refers to an electrical telegraph. Wireless telegraphy is transmission of messages over radio with telegraphic codes. Contrary to the extensive definition used by Chappe, Morse argued that the term telegraph can strictly be applied only to systems that transmit and record messages at a

  6. History of telecommunication - Wikipedia

    en.wikipedia.org/wiki/History_of_telecommunication

    The patented invention proved lucrative and by 1851 telegraph lines in the United States spanned over 20,000 miles (32,000 kilometres). [13] Morse's most important technical contribution to this telegraph was the simple and highly efficient Morse Code , co-developed with Vail, which was an important advance over Wheatstone's more complicated ...

  7. Transatlantic telegraph cable - Wikipedia

    en.wikipedia.org/wiki/Transatlantic_telegraph_cable

    Contemporary map of the 1858 transatlantic cable route. Transatlantic telegraph cables were undersea cables running under the Atlantic Ocean for telegraph communications. . Telegraphy is an obsolete form of communication, and the cables have long since been decommissioned, but telephone and data are still carried on other transatlantic telecommunication

  8. AP Human Geography - Wikipedia

    en.wikipedia.org/wiki/AP_Human_Geography

    Advanced Placement (AP) Human Geography (also known as AP Human Geo, AP Geography, APHG, AP HuGe, APHug, AP Human, HuGS, AP HuGo, or HGAP) is an Advanced Placement social studies course in human geography for high school, usually freshmen students in the US, culminating in an exam administered by the College Board. [1]

  9. Optical telegraph - Wikipedia

    en.wikipedia.org/wiki/Optical_telegraph

    [1] [2] [3] Chappe used the term télégraphe to describe the mechanism he had invented – that is the origin of the English word "telegraph". [4] Lines of relay towers with a semaphore rig at the top were built within line of sight of each other, at separations of 5–20 miles (8–32 km).