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The captain repeatedly called for more steam, which the engineer refused to furnish, cautiously keeping the pressure low because the salt water foamed in the boilers and some of it passed over into the cylinders, causing heavy thumping at the end of each piston stroke, and threatening to knock out the cylinder-heads.
In fig. 9 A is the furnace, B the steam chest, and C the smoke box which opens into the chimney. The front of the smoke box is usually closed by doors which may be opened when necessary to sweep the soot out of the tubes. The following are some forms of American boilers: Figs. 12 and 13 are the transverse and longitudinal sections of a common form of American marine boiler.
No particular hour had been fixed upon for starting on the up-river trip, but the passengers came on board at ten in the forenoon. At this time steam was up in the boilers, and everything ready for an immediate departure. But Mr. Cornwood had not put in an appearance. I had not seen him since he went on shore at the wharf, on Saturday evening.
The lull only deceived us, as we had scarcely gotten under way, before the gale raged with increased violence, and we were obliged to buffet it with all the force of our four boilers. The wind blew fiercely; but still we drove her between five and six knots per hour in the very teeth of it.
Battleship after battleship received her death-wound, and went down without being able to fire a shot in defence, until the Magnificent, smitten in the side under her boilers, blew up and sank amidst a cloud of steam and foam, and the Western Squadron had met the fate of the Eastern.
Some steel boilers were examined a few weeks ago which were among the first made; and the superintending engineer reports: "There is no sign of pitting or corrosion in any part of the boiler; the boilers are washed out very carefully every voyage, and very carefully examined, and I cannot trace anything either leaking or eating away.
A vessel of ten thousand tons will take engines of a certain weight and power to drive her at a given speed, and the larger the engine the larger the boilers and the greater the supply of coal required.
Safety hooks are often fitted to winding ropes, and although the damage to life and property is greatly reduced by the use of them, they do not protect a descending cage from injury in a case of overwinding; besides which, they are almost useless when a wild run takes place, an accident which, strange to say, has already occurred many times after engines and boilers have been laid off for repairs.
His Celtic jaw was set hard. All three threw their weight against the handle. The wheel stirred. As they straightened for another effort, a louder noise of hissing steam sounded from the boilers, and the fire-room force, mad with fright, came crowding through the passage to the higher floor of the engine-room. "Quick! Together!" Neville gasped. The wheel moved an inch. "Once more! Now!"
Returning to Constantinople, our steamer ran close to the European shore, stopping at the villages on that side. It is said they pay but little attention to their machinery and boilers, reasoning that if it is the will of Allah that the boiler blow up, it will certainly do so; if not, all will go right, and why trouble one's self?
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