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Q. Then the evaporating power of the boiler varies as the sectional area of the flue? A. The evaporating power varies as the square root of the area of the flue, if the length of the flue remain the same; but it varies as the area simply, if the length of the flue be increased in the same proportion as its other dimensions.
First he warms it in the flue of his furnace and then, using his croppie or iron, he puts it on the flattening-stone; if you look carefully you will see that the top of this stone is covered with a large sheet of glass. In the heat of the furnace the cylinder with the split uppermost soon opens out and falls back in a wavy mass. See?"
Which reminds one, by-the-by, as an added detail to our previous sketch of the scenery of the days to come, that there will be no chimneys at all to the house of the future of this type, except the flue for the kitchen smells. This will not only abolish the chimney stack, but make the roof a clean and pleasant addition to the garden spaces of the home.
The servants did his bidding in a moment; and then a sudden change came over his face. The eager look died away. He remained awhile looking down at the floor, which was covered with dust and flue, as was also the carving which had been concealed behind the chest. The prior looked down too, and shrugged his shoulders. "That tells a tale, my lord. Naught has been disturbed here for many a long day.
A flue cut in the chimney near the ceiling, with a register affixed, will, where stoves or furnaces are used, be of service, and are quite easily and inexpensively constructed.
The balloon swells out amazingly fast, and when the guy-ropes are loosened and drop to the ground, the elephantine bag clumsily lunges this way and that, causing shrill squeals from those who fear to be whelmed in it. The man in the singlet tosses kerosene into the furnace from a tin cup, and you can see the tall flames leap upward from the flue into the balloon. It grows tight as a drum.
This latter, which I have more particularly described and illustrated in the chapter on heating and ventilation, should, if the system adopted be on the ordinary hot-air principle, be so placed that an abundant supply of fresh pure cold air can be obtained for the furnace, which, when heated, can be delivered into the hottest room above, not less than 5 ft. from the level of the floor of that chamber, and, also, where a smoke flue of ample section can be constructed.
The young man examined the construction of the chimney, and found another flue besides that of the Franklin stove, into which the diary had fallen. It had formerly served for a fireplace in an adjoining apartment, and had been bricked up before the landlord purchased the estate.
Basine, for greater safety, had brought Eve into her bedroom, and now she opened the door of a little closet, lighted only by a skylight in such a way that prying eyes could not see into it. The two friends unstopped the flue which opened into the chimney of the stove in the workroom, where the girls heated their irons.
Most steam automobile boilers are of the water-tube variety that is, water to be turned into steam is carried through the flames in pipes, instead of the heat in pipes through the water, as in the ordinary flue boilers. Compactness, quick-heating, and strength are the characteristics of motor-car boilers.
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