CHAPTER XII.

Being satisfied that the machine used for paying out the cable was defective, Mr. Field went to Washington and procured from the Navy Department the services of Mr. Wm. E. Everett, the chief engineer of the "Niagara," stating to that gentleman the necessity for a new machine, and urging him to invent it. This Mr. Everett succeeded in doing during the winter. His machine was regarded as a great improvement on that which had been used on the "Niagara." "It was much smaller and lighter. It would take up only about one third as much room on the deck, and had only one fourth the weight of the old machine. Its construction was much more simple. Instead of four heavy wheels, it had but two, and these were made to revolve with ease, and without danger of sudden check, by the application of what were known as self-releasing brakes. These were the invention of Mr. Appold, of London, a gentleman of fortune, but with a strong taste for mechanics, which led him to spend his time and wealth in exercising his mechanical ingenuity. These brakes were so adjusted as to bear only a certain strain, when they released themselves. This ingenious contrivance was applied by Mr. Everett to the paying-out machinery. The strength of the cable was such that it would not break except under a pressure of a little over three tons. The machinery was so adjusted that not more than half that strain could possibly come upon the cable, when the brakes would relax their grasp, the wheels revolve easily, and the cable run out into the sea 'at its own sweet will.' The paying-out machine, therefore, we are far from claiming as wholly an American invention. This part of the mechanism was English. The merit of Mr. Everett lay in the skill with which he adapted it to the laying of the Atlantic cable, and in his great improvements of other parts of the machinery. The whole construction, as it afterward stood upon the decks of the 'Niagara' and the 'Agamemnon,' was the combined product of English and American invention."