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Telegraphy (from the Greek words tele = far and graphein = write) is the long-distance transmission of written messages without physical transport of letters, originally over wire. Radiotelegraphy or wireless telegraphy transmits messages using radio. Telegraphy includes recent forms of data transmission such as fax, email, and computer networks in general. (A telegraph is a machine for transmitting and receiving messages over long distances, i.e. for telegraphy. The word telegraph alone generally refers to an electrical telegraph.) Wireless telegraphy is also known as CW, for continuous wave (a carrier modulated by on-off keying, as opposed to the earlier radio technique using a spark gap).
Telegraphy messages sent by telegraph operators using Morse code were known as telegrams or cablegrams, often shortened to a cable or a wire message. Later, telegrams sent by the Telex network, a switched network of teleprinters similar to the telephone network, were known as telex messages. Before long distance telephone services were readily available or affordable, telegram services were very popular. Telegrams were often used to confirm business dealings and, unlike e-mail, telegrams were commonly used to create binding legal documents for business dealings.
Wire picture or wire photo was a newspaper picture that was sent from a remote location by a facsimile telegraph.
More on [ Telegraphy ]
Telegraphs :: Telephones and Telegraphs
Morse Telegraphy :: Boatanchors
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Submarine Telegraphy - Traces the history of undersea cable communications, from the first telegraph cables used in 1850 to the fiber optic cables used today for the Internet.
Meta Description: [ History and development of the atlantic telegraph cable and submarine telegraphy; sources for books and information ]
Events in Telecommunications History - A chronology of telecommunications history from the British Telecom Group archives.
Meta Description: [ BT Archives Key dates in telecommunications history Here we provide a detailed history of the telecommunications industry dating back to This chronology has been put together from a variety of information sources but mainly from ]
Ezra Cornell: a Nineteenth-Century Life - An on-line exhibit from Cornell University Library that documents his involvement with the construction of the first telegraph lines in America.
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Granville T. Woods - Biography of this African-American engineer and inventor, who developed and patented several inventions relating to telegraphy.
Historic Speedwell - Morristown, NJ - Home - A National Historic Site where Alfred Vail constructed and improved the telegraph instruments used by Samuel Morse. Included is an account of the development of the telegraph from Vail's perspective.
Meta Description: [ Home of the Speedwell Iron Works, Morristown, NJ, Birthplace of the electro-magnetic telegraph (1838) ]
Historical Sketch of the Electric Telegraph - Full text of Alexander Jones. 1852 publication.
History of Teletype Development - Brief historical account of the printing telegraph system.
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Knights of the Key. - Old time telegraphers tell their stories. Taken from early editions of Railroad Man's Magazine.
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Modern Practice of the Electric Telegraph - The entire 19th century book by Franklin Pope is viewable at this site. This was the standard reference book used by the U.S. Signal Service.
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Morse Code on 78's - The history of Morse code practice lessons recorded on early 78 rpm records with samples you can hear.
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N7CFO - The homepage of ham radio operator, Lynn Burlingame, N7CFO. This site includes several resources for telegraph historians including the index of the 1894 book, Telegraphers of Today. Also available is the index and information about the publication, The N7CFO KeyLetter, a major resource for telegraph instrument collectors.
Samuel F. B. Morse Papers at the Library of Congress, 1791-1919 - An online presentation comprising about 6,500 items that document Morse's career, including his invention of the electro-magnetic telegraph and participation in the development of telegraph systems used in the United States and abroad.
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Stock Ticker History - A brief history of the development of the stock ticker.
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Telegraph History - an assortment of articles that focus on U.S. telegraph history.
Telegraph Instruments of Europe - An extensive presentation of the private telegraph instrument collection of Fons Vanden Berghen. Many of the instruments presented appeared his book, Classics of Communication
The Art and Skill of Radio Telegraphy - A comprehensive manual for learning, using, mastering and enjoying Morse code as a means of communication, by William G. Pierpont, N0HFF.
The Atlantic Cable - Image reproduction of a book by Bern Dibner, published by the Burndy Library.
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The Commercial Cable Company - History of the Commercial Cable Company and its Atlantic telegraph cables.
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The Early History of Data Networks - The on-line version of a book by Gerard J. Holzman and Bjorn Pehrson with extensive information about the history of optical telegraphy.
The Electromagnetic Telegraph - A technical history of the 19th-century electromagnetic telegraph by Dr. James B. Calvert.
The Joseph Henry Papers Project - Documenting the life of the revered American scientist who conducted pioneering work in electromagnetism. His unselfish genius helped bring about the inventions of the telegraph, electric motor, and telephone.
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The Overland Telegraph - Essay describes the construction of the telegraph connecting Adelaide and the rest of Australia, through Darwin, with England in 1872.
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The Railroad Telegrapher - Article by Jim Thompson, a retired San Francisco Railway telegrapher.
The Sparks Telegraph Key Review - An interactive historical and pictorial review of telegraph and wireless telegraph keys. Included is a comprehensive listing of the manufacturers actively building equipment and keys during the spark-era of radio.
Thomas A. Edison Papers - Information and documents about Edison's life and career including his years as a telegrapher and inventions in the field of telegraphy.
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Western Union Telegraph Company Records - Scope and contents of the collection held at the Smithsonian Institution, National Museum of American History, Archives Center. Features a history of the company and collection. A major resource for researchers.
| the editorial board of The Nashua Telegraph Nov 7, 2007. 60 minutes. Posted with permission, courtesy of The Nashua ... | |
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