. The book of the garden. Gardening. 416 PLANT-HOUSES. of quiescence is a bad conductor of heat, but in a state of motion it is a good one. To provide this circulation, an air-drain should communicate between the stoke- hole and the open flues in which the pipes are laid. It need not communicate with the external air, as it would thus draw in too much cold air, particularly in frosty weather, and lower the temperature in the house instead of raising it. The furnace, stoke-hole, &c, n in sec- tion, should be placed in a vault beneath the centre of the house, access being obtained to it by a
. The book of the garden. Gardening. 416 PLANT-HOUSES. of quiescence is a bad conductor of heat, but in a state of motion it is a good one. To provide this circulation, an air-drain should communicate between the stoke- hole and the open flues in which the pipes are laid. It need not communicate with the external air, as it would thus draw in too much cold air, particularly in frosty weather, and lower the temperature in the house instead of raising it. The furnace, stoke-hole, &c, n in sec- tion, should be placed in a vault beneath the centre of the house, access being obtained to it by a well stair, m, covered with a neat iron grating set level with the surface of the walk or ground around the house, and sufficiently large to allow a man to enter freely. The vault should also be sufficiently capacious to hold a supply of coals and the refuse ashes, so that a supply and clearing-out once a month may be sufficient. The air ad- mitted by the grating over the stair will be sufficient to insure a well-regulated combustion in the furnace, and also a supply of moderately-heated air to cause circulation of the heat from the pipes within. In summer, in the case of the greenhouse aquarium, a species of venti- lation will take place when the ventilators in the floor are kept open, which will lower the temperature in hot weather very considerably, and much to the bene- fit of the plants; while, in regard to the tropical aquarium, the same means will produce a circulation of air through the structure, which will not only cause a re- gular diffusion of heat through every part of the house, from the floor upwards, but will carry in much of those natural ele- ments so necessary to plants, and with which an allwise Power has furnished the atmosphere in which we live. The smoke from the furnace may be carried away in a flue built within an outer covering or drain, and laid upon an incline rising from the furnace to the chimney-top, which may be concealed behind shrubs; or it ma
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectgardening, bookyear18
