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In general the term electrical telegraph refers to a signalling system where an operator makes and breaks an electrical contact with a telegraph key which results in an audible signal at the other end produced by a telegraph sounder which is interpreted and transcribed by a human. Morse and Vail's first telegraphs used a pen and paper system to record the marks of the Morse Code, and interpreted the marks visually however, operators soon realized that they could "read" the clicking of the receiver directly by ear. Systems which automatically read the signals and print formed characters are generally called teletype rather than telegraph systems. Some electrical telegraphs used indicators which were read visually rather than by ear. The most notable of these was the early transatlantic telegraph cable.
Within 30 years of its invention, the telegraph network crossed the oceans to every continent, making instant global communication possible for the first time. Its development allowed newspapers to cover significant world events in near real-time, revolutionised business, particularly trading businesses, and allowed huge fortunes to be won and lost in an orgy of investment in research and infrastructure building reminiscent of the 1990s dot-com boom. Few inventions have ever had greater impact.
On January 6, 1838 Morse first successfully tested the device and on February 8February 8 is the 39th day of the year in the Gregorian Calendar. There are 326 days remaining, 327 in leap years. Events 421 Constantius III becomes co-Emperor of the Western Roman Empire 1587 Mary, Queen of Scots is executed. 1622 King James I of Englan he publicly demonstrated it to a scientific committee at the Franklin InstituteThe Franklin Institute is the national memorial to Benjamin Franklin, that serves to perpetuate his legacy; the museum contains many of Franklin's personal effects. On February 5, 1824, Samuel Vaughan Merrick and William H. Keating founded The Franklin In in Philadelphia, PennsylvaniaAlternate meanings: Philadelphia (disambiguation Philadelphia is the fifth-largest city in the United States and the largest city in Pennsylvania, occupying all of Philadelphia County . As of the 2000 census, the population was 1,517,550, but a July 1, 20. The first electronic telegram was sent by Morse on May 24May 24 is the 144th day of the year in the Gregorian calendar (145th in leap years). There are 221 days remaining. Events 1153 Malcolm IV becomes King of Scotland. 1218 The Fifth Crusade leaves for Egypt. 1430 Joan of Arc is captured at Compiegne. 1487 Im, 1844 from BaltimoreThis article is about the city in the US state of Maryland. For other meanings of the word "Baltimore", please see: Baltimore (disambiguation Baltimore is an independent city located in the U. State of Maryland. As of July 1, 2002, the population is 638,6 to Washington, D.C., and said "What hath God wrought!" (from the BiblicalThe Bible (From Greek βιβλια biblia meaning "books", which in turn is derived from βυβλος byblos meaning "papyrus", from the ancient Phoenician city of Byblos which exported papyrus) book of NumbersThe Book of Numbers is the fourth of the books of the Pentateuch, called in the Hebrew ba-midbar , i. in the wilderness. In the Septuagint version it is called Arithmoi ("Numbers"), and this name is now the usual title of the book. It is so called because 23:23: Surely there is no enchantment against Jacob, neither is there any divination against Israel: according to this time it shall be said of Jacob and of Israel, What hath God wrought!).
See also: telegraphy, telegraph key.
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