. Cassell's popular gardening. Gardening. Fig. 81. Fig. 83. Fig. 80. -Weeks's Hydro-caloric Fig. 82.ââ '.Varin Air Casing for Pipes. and by keeping this either charged or otherwise, hot air moist or dry is obtained at pleasure. A two-inch pipe, leading direct from the main, renders the venti- lator efficient, while the ordinary heating apparatus remains cold. A simple and efficient mode of warming the entering air before it comes in contact with the plants in stoves will be found in Fig. 81. To prevent a rush of cold air into the house through the ordinary ventilators, a, the hot-
. Cassell's popular gardening. Gardening. Fig. 81. Fig. 83. Fig. 80. -Weeks's Hydro-caloric Fig. 82.ââ '.Varin Air Casing for Pipes. and by keeping this either charged or otherwise, hot air moist or dry is obtained at pleasure. A two-inch pipe, leading direct from the main, renders the venti- lator efficient, while the ordinary heating apparatus remains cold. A simple and efficient mode of warming the entering air before it comes in contact with the plants in stoves will be found in Fig. 81. To prevent a rush of cold air into the house through the ordinary ventilators, a, the hot-water pipes are enclosed in per- forated zinc, B, which being made hot by its proximity to the pipes, causes the air which passes through it to divide into a gentle stream on its way to the body of the house. Another stream of hot air passes up at the back of the table d, which is solid, and entering at c, protects the plants nearest the glass from the ill-effects of cold. As a cold-weather mode of cavity is fed with fresh air from the exterior^ of the house by a pipe five inches in diameter, which springs from the lower surface of the sheath, and passes through the front wall of the house to the external air. There is a valve in this feed-pipe to modify the supply of fresh air at pleasure. In the upper surface of the sheath is a double row of small holes, so that the moment that the cold air comes into the chamber round the pipe, and gets hot, expanded, and lighter, it makes its exit through these holes into the general atmosphere of the ; The Amateur's Ventilator. â The amateur who builds a small green-house or Vinery upon strictly economical principles, and docs not wish to incur the expense of ventilating gear for so small a structure, may adopt the older system of opening. 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 perfect
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Keywords: ., bookcentury1800, bookdecade18, booksubjectgardening, bookyear1884
