After bidding May and Gertrude good-night, he told the colonel that he should now take the Elevated Railway for the steamer "Campania," as he wished to observe at midnight the firing of the great battery of boilers of the steamer; and that he would return in time for breakfast with the party. "Let eight o'clock then be the hour, George," and the capitalist and his trusted superintendent separated for the night. The elevated railway was not swift enough to carry George Ingram to Pier No. 40, so anxious was he to see the midnight fires started in the hundred furnaces of one of the two largest steamers afloat. It was fifteen minutes to twelve o'clock when he reached the dock, and provided with a letter of introduction to the chief engineer, he hurried as fast as possible to the officer's cabin. The young engineer's night ashore had been spent at the opera, and, advised of George Ingram's visit, he had promptly returned to the steamer. Mr. Carl Siemens, engineer, was a relative of Siemens Brothers & Co., Limited, the great electrical and telegraph engineers of London. His education had been thorough, and he was very proud of his steamer the "Campania," especially of the motive power, which he helped to design. He gave young Ingram a cordial greeting. For two hours they examined and talked of mechanism for ships and mills, and they even ventured to guess what the earth's motive power might be. It was now five minutes of midnight. The chief furnished Ingram an oversuit and the young engineers dropped through manholes and down vertical and spiral ladders into the cellar of the steamer, the bottom of which was thirty feet below the water level. "The 'Campania,'" said Siemens, "has a strong double bottom that forms a series of water-tight compartments which, filled with water, furnish ballast when necessary. On the second steel or false bottom of the steamer, fore and aft, are located the boilers, furnaces, and coal-bunkers. We have fourteen double-ended boilers, fitted longitudinally in two groups, in two water-tight compartments, and separated by huge coal-bunkers. Each boiler is eighteen feet in diameter and seventeen feet long. The thickness of the steel boilerplate is 1-17/32 inches. Above each group of boilers rises 130 feet in height a funnel nineteen feet in diameter, which, if a tunnel, would easily admit the passage of two railway trains abreast." George saw the fires lighted, and when the furnaces required more coal, suddenly a whistle brought fifty stokers or firemen, the automatic furnace doors flew open, and a gleam of light flooded everything. Long lances made draft-holes in the banks of burning coal, through which the air was sucked with increasing roar. The round, red mouths of the hundred craters snapped their jaws for coal, which was fed them by brawny men whose faces were streaked with grimy perspiration, and their bodies almost overcome by heat. The hundred furnaces are kept at almost white heat from New York to Liverpool.