Journal of horticulture, cottage gardener and country gentlemen . Fig. 7. Fig. 7 shows an ordinary pit heated by two hot-waterpipes, a a, for bottom heat, which aie surrounded by rubble,such as half bricks, lic, from 6 to 9 inches of the same beingplaced above them; the rougher parts of the compost arethen put on, or a layer of charred turves an inch thick, so asto prevent the finer soil from passing into the rubble, andon that from 10 inches to a foot of soil, 6, in which theMelons are planted in the centre of the bed. They aretrained over the soil in the same manner as those in dungframes. T
Journal of horticulture, cottage gardener and country gentlemen . Fig. 7. Fig. 7 shows an ordinary pit heated by two hot-waterpipes, a a, for bottom heat, which aie surrounded by rubble,such as half bricks, lic, from 6 to 9 inches of the same beingplaced above them; the rougher parts of the compost arethen put on, or a layer of charred turves an inch thick, so asto prevent the finer soil from passing into the rubble, andon that from 10 inches to a foot of soil, 6, in which theMelons are planted in the centre of the bed. They aretrained over the soil in the same manner as those in dungframes. There are two four-inch hot-water pipes in front, atc, to maintain the proper degree of atmospheric heat, thesoil being kept from them by a slate on edge, d. e e is the August 23, 1864. ] JOUKNAL OP HOETICULTTJEE AND COTTAGE GAEDENEE. 153 ground level. Except in being heated by hot water the pitdoes not diifer from an ordinary Fig. 8. Mg. 8 is the end section of a pit heated by hot-water pipes,differing little from the preceding, except in the bottom heatbeing supplied by two four-inch pipes to a chamber, a a, thesoil being supported above by flagstones, which also formthe upper cover of the hot-air chamber; two of their endsand sides rest on the outer walls, the other on pillars ofbrick or stone as o. The flags are not laid in mortar buthave the joints open. A few inches of rubble placed on theflags prevent the joints from becoming choked with are two four-inch pipes in front for top heat, c is thespace for a thickness of 1 foot of soil, and d the space forthe plants ; e e is the ground level. This mode of furnish-ing bottom heat to Melons—viz., by hot-air chambers, ispreferable to placing rubble over the pipes as in _fig. 7, orsoil immediately in contact with the pipes. The heat ismore equable by the chamber system, and communicates tothe soil above a much lower temperature; but the heat isgr
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