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Water was still over the track and we proceeded at a snail-like pace. Just at the edge of the bridge we stopped; Dad looked over the situation and said: "The water is within two inches of the fire-box now, and it's doubtful if we can get across, but here goes and God save us all."
Almost every part of a locomotive is controlled from the cab, which prevents unnecessary stopping to correct defects; from his seat the engineer can let the condensed water out of the cylinders; he can start a jet of steam in the stack and create a draft through the fire-box; by the pressure of a lever he is able to pour sand on a slippery track, or by the manipulation of another lever a snow-scraper is let down from the cowcatcher.
The grate area is 17.5 square feet, and the heating surface is, in tubes, 1,203 square feet, and fire-box, 110; total, 1,313; and the engine weighs 42 tons in working order. These engines take fourteen coaches, or a gross load of 222 tons, at 50 miles an hour over gradients of 1 in 120 to 1 in 130, with a consumption of 28 lb. of coal per mile.
The boiler is 10 ft. 2 in. long and 4 ft. 3 in. diameter; the fire-box is of copper with a fire-grate area of 17.8 square feet, and the heating surface is in the tubes 1,080 square feet, fire-box 102 square feet; total, 1182 square feet. The weight in working order is about 35 tons.
Bathed in the blinding light, the fireman stood for a space, swinging his scoop with pendulum precision from fire-box to coal-tank and back again; then the whole scene went out suddenly. Engineer Macdonald, leaning out over his armrest, chafed at the delay as he choked her head for the Spruce Valley grade.
Tom lurched cautiously toward the tender, grabbed a log and dragged it back after him. Brown swung the door of the fire-box open. Tom gasped as the heat struck him. The red flames seemed to leap out at him, enveloping him, smothering him. He slid the log into the fire. The door crashed shut again. "More! More!" yelled Brown. Again and again Tom fed logs into the flames.
It was the pioneer in most of the improvements which were later adopted by other roads. The Pennsylvania was the first American railroad to lay steel rails and the first to lay Bessemer rails; it was the first to put the steel fire-box under the locomotive boiler; it was the first to use the air brake and the block signal system; it was the first to use in its shops the overhead crane.
A halo of kitcheny smell floated about it, and the open door of its fire-box, in which brands were burning furiously, and a jet of vapor from somewhere, gave it quite the appearance of an odd steam engine. Beside the contre-torpilleur stood the two cooks, both unusually small in stature.
Then I was angry, and said I, 'What! are you not glad that poor child is found? and I called to Thomas Snell and said, 'If the Squire will not let me, do you open the door and call her in. So Thomas Snell went and opened the door, and the wind setting that way blew in and overset the two candles that was all we had lighted: and Esquire Martin fell away from holding me; I think he fell down on the floor, but we were wholly in the dark, and it was a minute or two before I got a light again: and while I was feeling for the fire-box, I am not certain but I heard someone step 'cross the floor, and I am sure I heard the door of the great cupboard that stands in the room open and shut to.
When the coal is burning brightly, shut up all the dampers save the slide in front of the grate, and you will have a fire which will last, without poking or touching in any way, four hours. Even if a little more heat is needed for ovens, and you open the draughts, this rule still holds good. Never, for any reason, allow the coal to come above the edge of the fire-box or lining.
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