Crossword clues for telegraphy
The Collaborative International Dictionary
Telegraphy \Te*leg"ra*phy\, n. [Cf. F. t['e]l['e]graphie.] The science or art of constructing, or of communicating by means of, telegraphs; as, submarine telegraphy.
Wiktionary
n. 1 communication at a distance by means of the telegraph, either over wires or by wireless telegraphy, usually using Morse code 2 the apparatus and techniques used in such a system
WordNet
n. communicating at a distance by electric transmission over wire
apparatus used to communicate at a distance over a wire (usually in Morse code) [syn: telegraph]
Wikipedia
Telegraphy (from Greek: τῆλε têle, "at a distance" and γράφειν gráphein, "to write") is the long-distance transmission of textual or symbolic (as opposed to verbal or audio) messages without the physical exchange of an object bearing the message. Thus semaphore is a method of telegraphy, whereas pigeon post is not.
Telegraphy requires that the method used for encoding the message be known to both sender and receiver. Such methods are designed according to the limits of the signalling medium used. The use of smoke signals, beacons, reflected light signals, and flag semaphore signals are early examples. In the 19th century, the harnessing of electricity led to the invention of electrical telegraphy. The advent of radio in the early 1900s brought about radiotelegraphy and other forms of wireless telegraphy. In the Internet age, telegraphic means developed greatly in sophistication and ease of use, with natural language interfaces that hide the underlying code, allowing such technologies as electronic mail and instant messaging.
Usage examples of "telegraphy".
The perfection of wireless telegraphy has caused the Ardois and other signal systems depending upon sight or sound to be discarded in all but exceptional cases.
Edison invented duplex telegraphy by which two messages could be sent over the same wire in the same direction at the same time.
It is recorded that a Spaniard suggested submarine telegraphy in 1795.
These gutta-percha-covered wires were used for underground telegraphy both in England and on the Continent.
Professor Thomson had been studying the problems of submarine telegraphy with growing enthusiasm, and had now arrived at the conclusion that the conductivity of the cable depended very largely upon the purity of the copper employed.
Professor Thomson was to give to submarine telegraphy an even more remarkable instrument.
His experiments with telegraphy and telephony had been laid aside, and there seemed little chance that he would turn from the work in which he was accomplishing so much for so many sufferers, and which was bringing a comfortable financial return, and again undertake the tedious work in search for a telephone.
It occurred to him that by their aid wireless telegraphy might be accomplished.
Each week he expected the news that wireless telegraphy had been established, but the news never came.
To make wireless telegraphy effective over any considerable distance a highly efficient and extremely sensitive receiving device is necessary.
The British Admiralty quickly recognized the value of wireless telegraphy to war vessels.
XVIII THE WIRELESS SERVES THE WORLD Marconi Organized Wireless Telegraphy Commercially--The New Wonder at the Service of the World--Marine Disasters Prevented--The Extension of the Wireless on Shipboard--Improved Apparatus--The Wireless in the World War--The Boy and the Wireless.
With an increase in the number of wireless stations and varieties of apparatus came a wide increase in the uses to which wireless telegraphy was applied.
Another interesting application of wireless telegraphy is to the needs of the fire-fighters.
What startling developments of wireless telegraphy lie still in the future we do not know.