. The book of the garden. Gardening. HEATING BY HOT-WATER PIPES. 177 With the view of remedying this defect so far, Mr Neeve proposed to vary the length of the boiler according to the length of the pipes employed; and there- fore he recommends a rectangular figure rather than a square or circular one. Proceeding on the well-known fact that the bottom of a boiler is far superior to the sides for absorbing heat, he lengthens out his boiler, and, as we think, very properly forms it with a slight dip at c, which must have a tendency to prevent the flame from passing too rapidly over the bottom; th
. The book of the garden. Gardening. HEATING BY HOT-WATER PIPES. 177 With the view of remedying this defect so far, Mr Neeve proposed to vary the length of the boiler according to the length of the pipes employed; and there- fore he recommends a rectangular figure rather than a square or circular one. Proceeding on the well-known fact that the bottom of a boiler is far superior to the sides for absorbing heat, he lengthens out his boiler, and, as we think, very properly forms it with a slight dip at c, which must have a tendency to prevent the flame from passing too rapidly over the bottom; the flue also passing round the end and sides of the boiler, as shown in transverse section, exposes nearly the whole surface to the action of the fire. Waldroris boiler, fig. 214.—This boiler is 3 feet long, 2 feet 6 inches wide, and Fig. the same in depth. The fire is made in the middle, and spreads around the out- sides of the boiler, leaving only 6 inches of water over it. The fire-place is 18 inches wide, and 3 feet long, which, from the small quantity of water con- tained in the boiler, speedily heats the pipes attached to it. Not only is this boiler different from most others in shape, but it has another peculiarity almost its own, namely, an iron box fixed to its top, from which issue as many pipes as there are houses or pits to heat, allowing one pipe for each. Each of these pipes has a stopcock at its base to turn the water off or on any house, as may be required. A similar box is fixed to the side of the boiler near its bottom, in which all the return-pipes terminate. As this boiler is a close-topped one, a safety as well as feeding pipe is attached to it, both for the purpose of supplying it with water, and also to admit of the escape of air that may accumulate in it. When one house VOL. I. only is to be heated, of course the box is to be dispensed with, the flow and return pipes being fixed in the ordinary manner. p. The Scotch distillers' boiler, (fig. 215,
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectgardening, bookyear18
