History of telegraphy ( 27 ) :

• http://www.infography.com/content/562257288285.html

• http://w1tp.com

• http://www.faradic.net/~gsraven/index.shtml

• http://www.zianet.com/sparks/index.html

• http://www.la.ca.us/frandy/

• The Early History of Data Networks: a very complete history of early telegraphy by Gerard J Holzmann and Björn Pehrson.

• History of Telegraphy: from a 100 Years of Radio.

• A Short History of Telegraphy: a short but helpful history by Alan Hobbs and Sam Hallas.

• Telegraph Lore: an extensive collection of telegraphic memorabilia.

• Telegraph & Scientific Instrument: a set of web museum pages dedicated to the preservation of telegraph history, lore, and instrumentation by Tom Perera (W1TP).

• Heroes of the Telegraph by J. Munro: html fomat from the World Wide School.

• The Development of Telegraph Cable: an interesing paper from a copper trade association

• Materials prepared for Harvard's Communication Systems and Technology:

• Georges Lesage's "Spatially Multiplexed" Electrostatic Telegraph (1774)

• Samuel Thomas von Sömmering's "Spatially Multiplexed" Electrochemical Telegraph (1808-10)

Optical telegraphs

• The Optical Telegraph: the proceedings of a symposium on The Optical Telegraph held in Stockholm June 21-23 1994.  See in particular Chappe - Innovation and Politics in 1793 and 1794.

• Materials prepared for Harvard's Communication Systems and Technology:

• Semaphore Station at Staten Island (1838)

• The Chappe Telegraph Systems

• The Edelcrantz Telegraph Systems

Submarine telegraph cables

• The Picture of the Day: July 29, 1866 the completion of the transatlantic cable.

• A Thread Across the Ocean: The Heroic Story of the Trans Atlantic Cable:

• Underwater Telegraph Cable Details by Tom Perera (W1TP) gives useful insights on the early technology of submarine telegraphy.

• The home page of Transatlantic Cable Communications: "the Original Information

• Highway" Canso & Hazel Hill, Nova Scotia, Canada.  See in particular The Early Cable History.

Pictures from Semaphore to Satellite

The H.M.S. Agamemnon Laying Cable (1858)
Lord Kelvin Aboard the Great Eastern (1865)

 back to : Links >> History of Communication & Microwaves