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Griffin stated that neither himself, nor many of the people assembled, had eaten any food for two or three days. In several other places the soup-kitchens were attacked, and the boilers broken or attempted to be broken. At Kilfenora, the people carried off the boiler and threw it into a lough.
Then, when all was over, the imprisoned fiend in the boilers gave a piercing shriek; the leather bands slipped on the revolving drums, the spindles leaped into life again, and the old order of things was reinstated, outwardly, but not in effect. In general, when the grave closes over a man his career is ended. But Mr. Shackford was never so much alive as after they had buried him.
The number of square feet of heating surface per square foot of fire grate, is from 13 to 15 square feet in wagon boilers; about 40 square feet in Cornish boilers; and from 50 to 90 square feet in locomotive boilers. About 80 square feet in locomotives is a very good proportion. Q. What is the heating surface of boilers per horse power?
These produced no less than 340,000 tons of steel during the year 1881, and two years later the total output had risen to half a million tons. In 1876 the British Admiralty built two iron-clads, the Mercury and Iris, of Siemens-Martin steel, and the experiment proved so satisfactory, that this material only is now used in the Royal dockyards for the construction of hulls and boilers.
The water, too, which has sunk down into the earth, takes up much matter as it travels along. You all know that the water you drink from a spring is very different from rain-water, and you will often find a hard crust at the bottom of kettles and in boilers, which is formed of the carbonate of lime which is driven out of the clear water when it is boiled.
Q. Is the performance of this course by the smoke universal in wagon boilers? A. No; such boilers sometimes have what is termed a split draught.
She heard steps behind her, and turned, expecting to see the gardener, accompanied by the engineer from Dorchester. But only one figure was in sight, that of a youngish, slightly built man, who, for reasons she could not on the spot have specified, did not remotely resemble her preconceived notion of an authority on hot-house boilers.
Great boilers and kettles of tea were brewed, and hundreds of flat cakes, made of flour, water and a little salt, were baked in frying pans or on top of the stoves, cut into large pieces, and made ready for distribution.
It is that when, in such boilers, water, by carelessness or otherwise, is allowed to fall below any of the tubes, the steam which surrounds them is decomposed, and becomes an explosive mixture of hydrogen and oxygen gases, ready to explode with terrible violence whenever the temperature of the tubes shall have reached the proper point.
A. Mastic cement proper for the setting of boilers is sold in many places ready made.
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