The Story of the Atlantic Telegraph

This was a congratulation on an escape from death, for their cherished scheme had just passed through a critical period of its history. The enterprise had been in great danger of abandonment--at least for years, a peril from which it had been rescued only by the most prompt and vigorous effort. Thus after infinite toil, the wreck of old disasters was cleared away, and the mighty task begun anew. The works of the Telegraph Construction and Maintenance Company were the largest in the world, and all their resources were now put in requisition. Never did greater care preside over a public enterprise. It was a case in which the motive of interest was seconded or overborne by pride and ambition. A cable was to be made to span the Atlantic Ocean, and to join the hemispheres; and they were determined to produce a work that should be as nearly perfect as human skill could make it. The Scientific Committee, that had so long investigated the subject, had approved a particular form of cable, as "the one most calculated to insure success in the present state of our experimental knowledge respecting deep-sea cables," but at the same time recommended the utmost vigilance at every stage of the manufacture. These precautions deserve to be noted, as showing with what jealous care science watches over the birth of a great enterprise, and prescribes the conditions of success. They recommended: That the conductivity of the wire should be fixed at a high standard, certainly not less than eighty-five per cent; that the cable should be at least equal to the best ever made; that the core should be electrically perfect; that it should be tested under hydraulic pressure, and at the highest pressure attainable in the tanks at the Company's works; that after this pressure, the core should be examined again, and before receiving its outer covering, be required to pass the full electrical test under water; that careful and frequent mechanical tests be made upon the iron wire and hemp as to their strength; that special care be given to the joints, where different lengths of cable were spliced together; and that when completed, the whole be tested under water for some length of time, at a temperature of seventy-five degrees.