- Although the history of practical electric telegraphy does not date much further back than the middle of the, 9th century, the idea of using electricity for telegraphic purposes is much older.
There is an extensive telegraphic system linking the towns of the province to one another, and, through the surrounding countries, with Europe and the rest of the world.
There is a direct telegraphic service to Gondokoro and Khartum and to Mombasa.
There are no roads in the province, and very little internal communication and trade; but a wireless telegraphic system has been installed in communication with Rhodes: and there is a landline from Bengazi to Tripoli.
The word is still sometimes employed in this sense, as of the ship's telegraph, by means of which orders are mechanically transmitted from the navigating bridge to the engine room, but when used without qualification it usually denotes telegraphic apparatus worked by electricity, whether the signals that express the words of the message are visual, auditory or written.
The application of this to telegraphic purposes was suggested by Laplace and taken up by Ampere, and afterwards by Triboaillet and by Schilling, whose work forms the foundation of much of modern telegraphy.
The first requisite for electro-telegraphic communication between two localities is an insulated conductor extending from one to the other.
Copper is not yet universally employed, price being the governing factor in its employment; moreover, the conducting quality of the iron used for telegraphic purposes has of late years been very greatly improved.
In 1868 the International Bureau of Telegraphic Administrations was constituted at Berne, and a convention was formulated by which a central office was appointed to collect and publish information and generally to promote the interests of international telegraphy.
His Life of his father (1898), his Address to London Chamber of Commerce on " Imperial Telegraphic Communication " (1902), Lecture to Royal United Service Institution on " Submarine Telegraphy " (1907), Lectures to Royal Naval War College (1910) and R.E.
Assoc. Report), when he drew attention to the considerable distance over which inductive effects occurred between parallel wires forming portions of telephonic and telegraphic circuits.
In series with the tube is placed a single voltaic cell and a telegraphic relay, and Marconi added certain coils placed across the spark contacts of the relay to prevent the local sparks affecting the coherer.
With this apparatus some of Marconi's earliest successes, such as telegraphing across the English Channel, were achieved, and telegraphic communication at the rate of fifteen words or so a minute established between the East Goodwin lightship and the South Foreland lighthouse, also between the Isle of Wight and the Lizard in Cornwall.
When electric waves fell on the antenna they caused the mercury-steel junction to become conductive during the time they endured, and the siphon recorder therefore to write signals consisting of short or long deflexions of its pen and therefore notches of various length on the ink line drawn on the strip of telegraphic tape.
12039 of 1896) brought forward the idea of focusing a beam of electric radiation for telegraphic purposes on a distant station by means of parabolic mirrors, and tried this method successfully on Salisbury Plain up to a distance of about a couple of miles.
Varley, who proposed to make use of it in a telegraphic receiving instrument.4 In Dolbear's instrument one plate of a condenser was a flexible diaphragm, connected with the telephone line in such a way that the varying electric potential produced by the action of the transmitting telephone caused an increased or diminished charge in the condenser.
Successes achieved in those provinces failed, however, to save Nicotera from the wrath of the Chamber, and on the 14th of December 1877 a cabinet crisis arose over a question concerning the secrecy of telegraphic correspondence.
Since 1890 further and more rigorous application of the telegraphic method of determining longitudes differentially with Greenwich has resulted in a slight correction (amounting to about 2" of arc) to the previous determination by the same method through Suez.
The colonial revenue is chiefly derived from customs, stamp duties, land tax, income tax, beer excise, postal and telegraphic services, railways, and crown land sales and rents.
There are complete postal and telegraphic facilities in all parts of the colony save the Saharan Territories, and cable communication with France.
The postal and telegraphic services are also somewhat inadequate.
Guatemala joined the Postal Union in 1881; but its postal and telegraphic services have suffered greatly from financial difficulties.
Under its provisions it is a punishable offence " to break or injure a submarine cable wilfully or by culpable negligence in such manner as might interrupt or obstruct telegraphic communication either wholly or partially, such punishment being without prejudice to any civil action for damages.
Even people who know her fairly well have written in the magazines about Miss Sullivan's "mysterious telegraphic communications" with her pupil.
The iron wire used for wire-netting, telegraphic purposes, &c., is commonly galvanized, as also are bolts, nuts, chains and other fittings on ships.
Telegraphic communication with Europe is effected by cables laid along the Uruguayan and Brazilian coasts, and by the Brazilian land lines to connect with transatlantic cables from Pernambuco.
The postal and telegraphic facilities offered by the various states are very considerable.
In 1905 there were about 1 1,000,000 telegraphic messages sent, which gives an average of 2.7 messages per inhabitant.
Bristol, Exeter and other important towns have been laid, and eventually telegraphic communication between every important town in the United Kingdom will be rendered safe from interruptions caused by gales or snowstorms.
This system of telegraphic printing has a great advantage over the step-by-step system in avoiding the necessity for the rapidly acting electric escapement, which, however skilfully planned and executed, is always liable to failure when worked too rapidly.
In the Rowland multiple method of telegraphic working, the transmitter consists of a mechanical keyboard provided with a series of levers, which effect certain combinations of positive and negative currents for each letter.
Under the then existing telegraphic tariff the charge in Great Britain was a shilling for a twenty-word message over a distance not exceeding ioo miles; is.
Another reason assigned by the committee appointed by the Treasury in 1875 " to investigate the causes of the increased cost of the telegraphic service since the acquisition of the telegraphs by the state " is the loss on the business of transmitting Press messages, which has been estimated as at least £300,000 a year.
Visiting England in 1856, Field entered into an agreement with Bright and with John Watkins Brett, who with his brother Jacob had proposed the constructing of an Atlantic cable eleven years previously, with the object of forming a company for establishing and working electric telegraphic communication between Newfoundland and Ireland.
In 1890 Liverpool was placed in direct telegraphic communication with Hamburg and Havre, and London with Rome.
Direct telegraphic com munication was thus afforded between London and Vienna.
Statistical Society (September 1872, March 1881); Report of a Committee appointed by the Treasury to investigate the causes of the increased cost of the Telegraphic Service, &c. (1875); Reports of the Postmaster-General for 1895, &c.; Journ.
35) were sunk in the water; the pair on one side were connected by a battery B, and the pair on the other by a galvanometer or telegraphic receiver R.
At the receiving station Marconi connected a single voltaic cell B 1 and a sensitive telegraphic relay R in series with his tube of metallic filings C, and interposed certain little coils called choking coils.
The relay was employed to actuate through a local battery B2 an ordinary Morse printing telegraphic instrument M.
He caused the relay in series with the sensitive tube to set in action not only a telegraphic instrument but also the electromagnetic tapper, which was arranged so as to administer light blows on the under side of the sensitive tube when the latter passed into the conductive condition.
The resonance in the singer's deep voice made the song sound more powerful.
There is a complete postal and telegraphic service and a telephone line connects all government stations.
All the railway lines, like the postal, telegraphic and telephonic services, are state property.
There is a well-organized postal and telegraphic service.
This arrangement, however, never really came into force, for the simple reason that telegraphic communications between the West and Serbia were hopelessly irregular, and that events continued to move, with the advance of the Serbian army and civil authorities from the South and of the Italians from the West.
The buildings include the residence of the administrator, barracks, a government school for natives, a mosque and Hindu temple, and the establishment of the Mission du Sacre Caur, which possesses a large plantation of coco-nut palms. Bagamoyo is in telegraphic communication with Zanzibar and with the other coast towns of German East Africa, and has regular steamship communication with Zanzibar.
There is telegraphic communication between the magistracies and townships and with Natal.
These two newspapers now stand alone as purveyors of copious telegraphic news, and in the next rank, not greatly lower, comes the fiji Shimpo.
1878 the New York Tribune (Republican) published a series of telegraphic despatches in cipher, accompanied by translations, by which it attempted to prove that during the crisis folio;ring the election Tilden had been negotiating for the purchase of the electoral votes of South Carolina and Florida.
Iquitos was put in wireless telegraphic communication with Puerto Bermudez on the 8th of July 1908, whence a land line runs across the Andes to Lima.
There is an extensive telegraphic system and a well-organized postal service.
In bringing about a system of penny postage throughout the empire; in forwarding the construction of the Pacific cable to secure close and safe imperial telegraphic connexion; in creating rapid and efficient lines of steamship communication with the motherland and all the colonies; in granting tariff preference to British goods and in striving for preferential treatment of inter-imperial trade; in assuming responsibility for imperial defence at the two important stations of Halifax and Esquimalt, - Canada, under the guidance of Sir Wilfrid Laurier and his party, took a leading part and showed a truly national spirit.
It is the capital of the eastern province of the protectorate, and is in regular steamship and telegraphic communication with Europe.
Transactions with distant markets are now done almost entirely by cable, and a remarkable development of the telegraphic code has enabled merchants to pack a good deal into a brief message.