DJ I for i i? TELEKY graphy are : 1, that neither key should put in action the receiving magnet at its own end of the line ; 2, that in all positions of the key signals should be sent through a line of con- stant length and capacity. This is done by dividing the current from the battery at each end of the line equally between the line itself and an equivalent resistance coil and condenser, and winding the wire round the receiving mag- nets in such a way that the two parts of the current produce equal and opposite magnet- ism in the core of soft iron. The modifica- tions made by Stearns in the arrangement of Siemens and Gintl have obviated all the prac- cal difficulties, and made duplex and even uadruplex telegraphy a success in the United tates. By means of Stearns's invention, known as the Franklin, the duplex system has gone to effect, not only between Boston and Wash- n, but also between Cape Breton and San ncisco, and has been introduced into Eng- .d. The quadruplex system works well be- ,ween Boston and New York. The phonetio system of Gray and Bell (which is still in its infancy) aims to increase indefinitely the umber of messages which can be sent si- .ultaneously over a single wire, by using ning forks, moved by electro-magnets, for sending and receiving the signals. Only one fork at the receiving station is in unison with particular fork at the sending station, and ponds to it. Experiments upon a similar stem were made by Paul la Cour in Copen- agen on a line of 242 m. in 1874, an account f which was presented to the royal Danish academy of sciences. It was thought that by this arrangement not only many messages could be sent at the same time on a single wire, but also a message could be received only by the station for which it was intended. See Schellen, Der elelctromagnetische Tele- graph (Brunswick, 1850) ; Moigno, Traite de la telegraphie electrique (Paris, 1849); Highton, " The Electric Telegraph, its History and Pro- gress," a number of Weale's series (London, 1852) ; Jones, " Historical Sketch of the Elec- tric Telegraph " (New York, 1852) ; Turnbull, " The Electro-Magnetic Telegraph " (Philadel- phia, 1853) ; Schaifner, "Telegraph Compan- ion" (2 vols., New York, 1854-'5), and "The Telegraph Manual" (1859); Prescott, "His- tory, Theory, and Practice of the Electric Telegraph" (Boston, 1859); Dumoncel, Tele- graphie electrique (Paris, 1864) ; Field, " His- tory of the Atlantic Telegraph " (New York, 1866) ; Griscom, "The Telegraph Cable " (Phil- adelphia, 1867); Sabine, "The Electric Tele- graph" (London, 1867); Cully, "Handbook of Practical Telegraphy " (New York, 1870) ; Goldsmid, "Telegraph and Travel, a Narrative of the Formation and Development of Tele- graphic Communication between England and India" (London, 1874); and Douglas, "A Manual of Telegraph Construction" (1875). TELEKY, L&szlo, count, a Hungarian states- man, born in Pesth, Feb. 11, 1811, died there, TELEOSAURUS 621 May 8, 1861. He studied at Pesth and Patak, wrote a drama, Kegyencz ("Favorite"), and became a leading opposition member of the diets of Transylvania and Hungary. In Sep- tember, 1848, he went as envoy of the Hunga- rian government to Paris, where he published Le Ion droit de la Bongrie (1849). After the close of the Hungarian war he resided mainly in Paris. During the war of 1859 he was a member of the Hungarian national committee in Italy, and in 1860 went to Dresden, where he was arrested and surrendered to the Aus- trian government. Francis Joseph restored him to liberty on the promise of severing his connection with the Hungarian refugees and abstaining from political agitation. After a few months, however, Teleky accepted an elec- tion by his former constituents to the house of representatives. The diet was opened April 6, 1861. The debate on the address to the mon- arch, prepared by Francis Deak, was to open on May 8, and Teleky, the leader of the radi- cals, who opposed any measure looking like a recognition of Francis Joseph as king of Hun- gary, prepared an elaborate discourse on the situation. This was found on his desk on the morning of the 8th, and near it on the floor the dead body of the writer, whom, as various in- dications showed, dissatisfaction with his own course had led to end his life by a pistol shot. TELEMACHl'S, a legendary Greek prince, son of Ulysses and Penelope. When Ulysses went to Troy, Telemachus was an infant. About the time for the father's return the son made an unsuccessful endeavor to eject the suitors for his mother's hand, and then set out to seek information of his father. Accompanied by Minerva, in the guise of Mentor, a faithful friend of Ulysses, he visited Pylos and Sparta, and was kindly received by Nestor and Mene- laus. Returning home, he found his father with the swineherd Eumseus, disguised as a beggar, and aided him in slaying the suitors. TELEOSAl'RUS, a genus of fossil crocodilians of the secondary epoch established by Geof- froy, differing from the living crocodiles in having biconcave vertebrae. The general form of the cranium was that of the gavials ; the nostrils opened anteriorly at the end of the muzzle and posteriorly on a level with the jugal arch ; the lower jaw was spoon-shaped at the end, with teeth on the sides like ca- nines, the other teeth being small, equal, con- ical, and adapted for seizing a fish prey ; the body was protected by larger and more solid plates, the anterior limbs were smaller, and the posterior more fin-like than in the present crocodilians. The strata which enclose their remains indicate a marine habitat. The genus has been divided by modern paleontologists into several subgenera, as given by Pictet. In the lias is found mystriosaurus (Kaup), hav- ing a very long muzzle, flattened head, and eyes directed upward. The T. (M.) Chapman- ni (Konig), from the upper lias of Yorkshire, England, is described in the "Philosophical
