310 Plant Structures to be heated hy Hot Water ^ ^c. 



the fire end if but one door. Sashes and rafters as in the cherry- 

 house. Trellis as in the peach-house. 



A Propagating-Pit for Tanners^ Bark and a Flue. Length 

 30 ft., width 16ft.; height at back 9 ft., at front 2 ft. Flue in 

 the front, and thence along the back, 3 ft. from the back wall, 

 and 2^ in. from the front wall. Pit, between the flues, 10 ft. 

 wide, and 3 ft. deep. Walk, 3 ft. wide, between the back flue 

 and the back wall. Cavity between the flue and the front wall 

 and the walls of the pit, 2^ in. A door in one end, or in the 

 middle of the back wall, into a shed. For shading the plants, 

 and for retaining heat at night in severe weather, a canvass 

 might be arranged inside, so as to run from each end to the 

 middle, immediately under the roof. Sashes and rafters as in 

 the cherry-house. 



A Propagating-Pit, without Tan, to he heated hy a SmoJce Flue 

 and Hot Water. Length 40 ft., width 14ft.; height at back 

 8 ft., in front 2 ft. The furnace to have a boiler over it. The 

 smoke flue to run all round the pit, and the hot- water pipes to 

 be laid in gutters under the pit; means being provided to fill 

 the gutters with water, and to let it off into a drain at pleasure. 

 The pit over the pipes to be 8 ft. wide, and 1 5 in. deep, and to 

 be filled with sawdust, sand, ashes, or mould, into which to 

 plunge the pots, &c. A door through the back wall into a 

 potting- shed. 



A Pit for fruiting Pine-apples. Length 30 ft., width 1 6 ft. ; 

 height at back 7 ft. higher than the front, at front 2^ ft. higher 

 than the pit. The pit to be level, 10 ft. wide, and 3 ft. deep if 

 for tan, but 4 ft. deep if for leaves. The flue to go from the 

 ftirnace to the front, and all round the pit; to be covered with 

 1-foot tiles, with a cavity between it and the front wall and the 

 walls of the pit of 2\ in. A path of 3 ft. wide between the 

 back wall and the back flue; over which early grapes may be 

 produced by properly preparing the soil under the path, and 

 covering it with a trellis to prevent it from being trodden on and 

 soddened. Vines, cucumbers, kidneybeans, strawberries, &c., 

 may be grown on shelves over the path, and also over the flues. 

 Sashes and rafters as in the cherry-house, and a boiler, if 

 desired, as in the preceding pit. 



A Succession- Pit for Pine-aj^ples may be, in all I'espects, similar 

 to the above; but 2 ft. narrower, and with the outer walls 18 in. 

 lower. 



A Wi?iter Cucumber-Pit. Length 30 ft, width 8 ft. ; height at 

 back 7 ft., at front 4 ft. A flue to run first to the front, and 

 return under the back wall, with cavities of 2^ in. The space 

 between the flues to have gutters for the pipes of a boiler, with 

 a power of filling and emptying the gutters at pleasure; so as to 

 have a connnand of either dry or moist air, as either may be 



