. The book of the garden. Gardening. only, instead of a bed of sand, the pots stand on the slates which cover the tanks. a shows the stair leading down to the passage from the back, b the chimney, c stoke-hole, d pipe for supplying the boiler and pipes with fresh water, e the gauge-pipe, the external orifice of which is level with the full height of the water within, so that, when the water flows from it in charging, it is certain that boiler, pipes, and tanks are full. This pipe is left open, so that, should the water expand from being over-heated or too full, it finds a ready escape. Fig. 62
. The book of the garden. Gardening. only, instead of a bed of sand, the pots stand on the slates which cover the tanks. a shows the stair leading down to the passage from the back, b the chimney, c stoke-hole, d pipe for supplying the boiler and pipes with fresh water, e the gauge-pipe, the external orifice of which is level with the full height of the water within, so that, when the water flows from it in charging, it is certain that boiler, pipes, and tanks are full. This pipe is left open, so that, should the water expand from being over-heated or too full, it finds a ready escape. Fig. 624 is a Fig. section across the furnace a and boiler b, showing also the flow and return pipes c d in front, and also the supply-pipe e. In the first instance, the slate covering extended from the passage across the pit over the tanks and hot-water pipes, and was let 3 inches into the front wall. This was found not to answer the purpose, as the pipes, being covered, gave little heat to the atmosphere. We have since had them altered, laying the pipes bare, and the top of the cavity in which they are being left open, which gives us sufficient top heat, and at same time counteracts the effects of too much damp. The stoke-hole p is behind, and wholly sunk under the ground-level; it is cov- ered with a door, and descended to by steps. There is a space also arched over for keeping the supply of coal. The chimney, being carried up 10 feet, is not shown at full height in section, and is finished with a cannon-shaped chimney- pot. Dalkeith cucumber-pit is nearly upon the same principle as the propagating-pit. In it we also found that covering the hot- water pipes in front induced an insuffi- ciency of atmospheric heat; we therefore have removed the pavement on top of the tank, and replaced it with other stones 9 inches narrower, which we find of great advantage. Under the bed of soil is the tank covered with Caithness pavement. Along the back of the bed are placed, 4 feet apart, sm
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectgardening, bookyear18
