. Cassell's popular gardening. Gardening. GLASS STRUCTURES AND APPLIANCES. 279 enters the tox a (Fig. 67); thence it passes through pipes b b to the box c; thence through D D to the box e ; thence through F F to boxes H H; thence through 11 to boxes K K ; and thence into the flow-box l. This repeated circulation abstracts a large. Fig. 66.—Section of Cliilwell Boiler. amount of heat—if anything, the danger may, perhaps, be of working at too high a temperature, as already referred to—and the furnace being ample and draught moderate, a steady combustion can be maintained through a long night. Th
. Cassell's popular gardening. Gardening. GLASS STRUCTURES AND APPLIANCES. 279 enters the tox a (Fig. 67); thence it passes through pipes b b to the box c; thence through D D to the box e ; thence through F F to boxes H H; thence through 11 to boxes K K ; and thence into the flow-box l. This repeated circulation abstracts a large. Fig. 66.—Section of Cliilwell Boiler. amount of heat—if anything, the danger may, perhaps, be of working at too high a temperature, as already referred to—and the furnace being ample and draught moderate, a steady combustion can be maintained through a long night. This is said to be the most powerful boiler yet made, and to bo capable of heating 2,000 feet, and even more. It requires only ^ a shallow stoke-hole, only four feet | three inches being required from the bottom of it to the level of the flow- pipe, a matter of importance in damp districts. One drawback to tubular boilers should be mentioned: when coal is burnt, the tubes are very apt to become coated with tar. Before closing these remarks on boilers, there is one useful little boiler which must not be overlooked, as there is not a garden in the United Kingdom, be it nobleman's or amateur's, in which it cannot be turned to excellent account, either for heating green- houses, Giape-rooms, coach-houses, or for giving temporary assistance where the pipes attached to larger apparatus are found in- adequate to their work. It is the Portable Boiler and Furnace represented in Fig. 68. It requires no setting, and will stand on the space occupied by an ordinary watering-can. It is very quick in its action, and performs an amount of work truly astonishing ; and it mpay be placed inside the house, although a place outside is preferable. Almost every maker now turns out these slow combustion. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly rese
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Keywords: ., bookcentury1800, bookdecade18, booksubjectgardening, bookyear1884
