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THE ATLANTIC TELEGRAPH THE ATLANTIC TELEGRAPIL- i X^IFTEEN years have barely elapsed since the success of the first Hue of electric telegraph demonstrated the immense practical importance of that invention. Its rapid adoption by almost every civilised nation already gives promise of even greater things than it has yot accomplished in the furtherance of social and com- mercial intercourse. It is, however, only within tlie last five years that practical men have wrought out successfully the appli- cation of the same principles to the still later problem of submarine telegraphy. Surroimded by every species of difficulty which besets a new and untried path, Mr. Brett, with the aid of a few associates, achieved in 18.51 his first success in the electric union of France and Jlngland. The result of this decisive experiment, favourable alike in its national, commercial, social, and, though last not least, in its reinunernti\'e aspects, has been such as to disarm all prejudice, and to encourage a desire for the utmost possibh^ extension of similar undertakings. England is now united by six distinct submarine cables to adjacent coosts, and other countries have not been slow to catch her spirit of enterprise in this important appli- cation of scicucc to the wants of man. • /, . • , '' America alone^ the greatest and most progressive ot all the nations with whom we have intercourse, has hitherto been debarred from participating ^^ ith us in the advan- tages of electric intercommunication, while the daily increasing requirements of the two nations render such an i'^tluttion more than ever necessary to the well-being of both. The genius of science and the spirit of commerce alike demand that the obstacles of geographical position and distance alone shall no longer prevent the accomplishment of such an union. Under the influence of these considerations, the subject of establishing a telegraph to America has been. largely and anxiously studied on both sides of the Atlantic. The careful and elaborate investigations of Lieutenant Maury, of the U. S. ^avy, into the ph^^sical geography of the sea, threw a new light upon Avhat had been sup- posed to constitute the chief engineering difficulties of such an enterprise. His clear and accurate definition of the currents of the ocean, and the soundings of the Atlantic deeps, — imperfectly known previous to his re- searciies, — have developed an extraordinary, and, to speak with I'everence, a providential fact. The two conditions to be chiefly desired for the successful submersion of a telegraphic cable are, the absence of currents interfering with the steady descent of the line ; and a level bottom with a stratum likely to remain undisturbed, and adapted for its subsequent security and preservation. These con- \ ditions, tliongh first elucidated for philosoi)liic objects other than those of telegraphic science, have been shown to exist in a remarkable degree throughout a plain extending between the coasts of Ireland and Newfoundland ; which possesses the additional advantage of being the shortest possible route between the shores of the Old and New World. Ho marked, indeed, are those features, and so favoiu'able is their bearing on the great project, that they seemed to the discoverer at the time so providential, as to justify his designation of it as the Telegraph-Plateau The mighty current which takes its rise in tlie Gulf of Mexico, and flows northward as far as the banks of Newfoundland, washes the eastern shores of the United States with great force ; and the precipitous hollows exist- ing in its course would render a route to the south of tlie bardvs impracticable for telegraphic purposes. Imme- diately to the north of the great banks these abysses cease to exist. Stretching away in a direct line from St. John's. Newfoundland, to the bay of Valentia, on the Irish coast, lies the vast sub-oceanic plain already referred to, which is situated in the line of nearly absolute rest of tlio waters of the Atlantic, the bed of which has been shown, by the specimens obtained on sounding, to consist throughout of the most minute microscopic shells, which, froi. ibeir delicate organism and the perfect state in which they are found, prove the utter absence of all motion in the water surrounding them. To use the words of the highest authority on the subject,'' — " this plateau is not too deep for the cable to sink down and rest upon, and yet not so shallow that * currents or icebergs or any abrading force can derange the wire after it is once lodged upon it." » Maury's riiysioal Geography of the Sea, p. 250'. III April, 1854, a company was incorporated by act of the Colonial Legislature of Newfoundland for tliQ })urposc of establishing a line of telegraphic conninmication between America and Europe. That Government evinced the warmest interest in the undertaking, and in order to mark substantially their sense of its importance, and their desire to give to it all the aid and encouragement in their power, they conferred upon it, in addition to important privileges of grants of land and subsidy, the sole and ^xcl'.volvo right of landing a telegra])hic line on the shores within their jurisdiction, comprising, in addition to th(.sc of Newfoundland, the whole Atlantic coast of Labrador from the entrance of Hudson's Straits to the Straits of Belle Isle. This act of the Colonial Legislature was sub- sequently ratified and confirmed by Her JVlajesty's Govern- ment at home. The Company also obtained in May, 1854, an exclusive charter from the government of Prince Edward's Island, and afterwards from the State of Maine, and a charter for telegraphic operations in Canada. The exclusive rights absolutely necessary for the encouragement of an undertaking of this nature having thus been secured along the only seaboard eligible for the western terminus of an European and American cable, the Company in the first instance commenced operations by proceeding to connect St. John's, Newfoundland, with the widely ramified telegraph system of the British North American provinces and the United States. This has been recently completed by the submersion c f two cables in connection with their land lines : one, eighty-five miles in length, under the waters of the Gulf of St. Lawrence, from Cape Bay Cove, Newfoundland, to Ashpee Bay, Cape Breton ; the other, of thirteen miles, across the Straits of Nortliunibcrland, connecting Prince Kchvanl's Island with New Hrunswick. Kloctric conmiunication in thus cstabhsliL'd direct from Newfoundland to all the British American Colonies and the United States. On the Irish side, lines of telegraph have been for some time in operation throughout the country, and are con- nected with Pjiigland and the Continent by submarine cables. The only remaining link in this electric chain, required to connect the two hemispheres by telegraph, is the Atlantic cable. The New York, Newfoundland, and London Telegraph Company being desirous that this great undertaking should be established on a l)road and national basis uniting the interests of the telegraph world on both sides of the Atlantic, have entered into alliance with persons of import- ance and influence in the telegraphic affairs of Great Britain : and in order at the same time to obtain the fullest possible information before entering upon the crowning effort of their labours, they have endeavoured to concentrate upon the various departments of the under- taking the energies of men of the highest acknowledged standing in their profession, and of oihers eminently fitted for the work, who were known to have devoted much time and attention to the subject. The route between the two shores had already been minutely surveyed by Lieut. Maury, whose name alone amongst, nautical men is a sufficient guarantee for the accuracy of the results obtahied, and whose personal counsel and co-operation the promoters are autho- rised to say will be given to the undertaking in bringing it to completion. The data obtained by him have re- ceived the most ample corroboration in the recent special soundings taken by order of the United States govern- ment, at tlio instance of tlie New York, Newfoundland, and London Telegraph Company by Lieutenant lierryman, U.S.S. " Arcti(!," whoso valuable and able assistance the Company wish to acknowledge. It is with the highest satisfaction that the Company are able to refer to tlie aid which her Majesty's Govern- ment are inclined to give to their labours. A line of soundings taken at spots intermediate between those e^^'ftctcit hy Lieut. Bcrryman, have been ordered by the Lords of the Admiralty to bo made forthwith ; and the readiness and cordiality with which every suggestion on the part of the j>romoters has been met by their LordHhii)s, and by those at the head of the several departments, call for the warmest thanks of all concerned in the undertaking. Li the engineering department, advantage will again be taken of Lieut. Maury's invaluable advice in connection with the machinery employed in paying out the cable, and of the co-operation of others who have carried out the submersion of the submarine lines already laid. The soundings of the ocean along the plateau, which gradually increase from 1000 fathoms to 2070 fathoms at the middle and deepest part, present no obstacle in depositing a cable with regularity along a soft and almost level plain of such a nature, — and the question of sub- merging a cable in depths almost equal, and under less favourable conditions, has been already surmounted without difficulty. Li order to determine various points connected with the electrical department of the undertaking, a continued investigation of all the phenomena connected with the jLise of long submarine circuits has been carried on during* tlic last two years ; niul rrofossor Morso, wlio 1ms recently visited Kngland, has, for many days consrciitively, gone into ji rijxid series of iU^nionsti'a lions on this snhject in connection witli those j^cnth'nien who have devoted so much energy and patience to this dcjiartiuent of the work. lie ileclares his conviction that the problem is conclusively solved, and that the attainment of full commercial success is no longer douhtl'ul. It may bo mentioned here, that the [jossibility of readily and rapidly transmitting telegraphic signals buyoiul a. certain distance by submarine wires, had been thrown into some doubt by the discovery of certain phenomena of induction aiid retardation, described by Professor Karaday. In the year 1H54, at the instance of Mr. Brett, Mr. Wildman Whitehouse first took up the subject, of the effects of induction in long submarine conductors, in its relation to j)ractical tclegrajjliy, by commencing a series of preliminary experiments upon a cable containing (J (5 (J miles of submarine wire. In the following year, when the great })roject of Transatlantic communication came more pro- minently into view, these experiments were continued more fully on I12r; miles of similar wire, the results being obtained and recorded with the utmost care and acciu'acy, by means of apparatus contrived for the purpose, and now both in character au