. The book of the garden. Gardening. 404 PLANT-HOUSES. consider a model house for this purpose. We may here also observe that lean-to Fig. 553. ¥ a m 1 i 1 1 houses are, of all others, the worst adapted for heaths, as the plants draw towards the light in front, while the opposite side becomes naked and deformed from want of it. Turning the plants frequently will not remedy this defect; besides, vegetable physiologists can assign reasons why this is injurious to them. In building a com- plete heath-house, cisterns should be pro- vided for collecting all the rain water that falls upon the roof,
. The book of the garden. Gardening. 404 PLANT-HOUSES. consider a model house for this purpose. We may here also observe that lean-to Fig. 553. ¥ a m 1 i 1 1 houses are, of all others, the worst adapted for heaths, as the plants draw towards the light in front, while the opposite side becomes naked and deformed from want of it. Turning the plants frequently will not remedy this defect; besides, vegetable physiologists can assign reasons why this is injurious to them. In building a com- plete heath-house, cisterns should be pro- vided for collecting all the rain water that falls upon the roof, and even for containing a greater quantity if conve- nient, as no plants suffer more from water impregnated with mineral substances than the heaths. For this purpose a cistern should be placed under the stage, and covered over to prevent too much evapo- ration in winter; but, in summer, it may be left uncovered with advantage. In the section above is shown top and bottom ventilation, to be used during winter, when opening the side or roof sashes would be inexpedient. The plants are arranged on the centre and side tables in the usual manner—the largest, of Fig course, occupying the centre platform. As all span-roofed houses present angular gable-ends, and as these are the points of entrance, we have here shown what we consider to be an improvement—namely, a lobby or porch, (a on ground-plan,) which is separated from the body of the house by a glass partition, and may be furnished with seats, or occupied with large specimen plants. Fig. 554 shows Fig. the elevation of one of the ends, which, on account of the form, has a fixed roof. The ventilators in the parapet wall are also shown, a a a a, as well as the door opening as high as the sides of the house. Fig. 555 shows the elevation of another span - roofed heath - house, the sides of which are glass sashes running on rollers, and fixed rails set on top of the stone plinth, the sashes being made to pass each other, as
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectgardening, bookyear18
