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THE POPULAR SCIENCE MONTHLY.
The fire-box, N N, is of steel, six feet two inches long outside, 312 feet wide, and five feet four inches high. The tubes, O O, are of iron, 142 in number, 214 inches diameter, and eleven feet seven inches long. The steam-dome, R, is thirty inches outside diameter, the smoke-stack
Fig. 42.—The Baldwin Locomotive, 1878.
p, 1412 inches. The feed-water is supplied by one pump, h, of 2½ inches diameter and two feet stroke, and by a No. 8 Giffard injector. The valves, T, are 1612 inches wide by 812 inches long, and have five inches travel. The steam-ports are 151516 inches wide and 114 inch long, and the exhaust-port 151516 by 212 inches. The lap of the
