HOT-BEDS, COLD FRAMES AXD PITS. 



!>7 



shoulder and come flush with the top. Each alternate 

 pair of sash is screwed fast to the ridge pole at the top 

 and to the plate at the bottom, thus forming rafters and 

 giving strength to the structure. The other pairs are to 

 be hinged to the plate at the wall and held in place at the 

 top by a hook, or by an iron strap punched with holes to 

 catch on a pin fixed to the ridge pole, so that they can 

 be propped up to admit air to the house. If the house is 



Fig. 



Section of Greenhouse. 



to be heated by an ordinary brick flue it should not be 

 more than forty or fifty feet long. A door wide enough 

 to admit a wheelbarrow should be in each end, and walk 

 through the center. Benches are to be made on each 

 side for holding soil or for placing flower-pots or boxes. 

 These benches and the whole house can be constructed 

 of rough lumber, with the cracks battened. The green- 

 house should run north and south, and at the north end a 

 shed should be made for a work room, and into which the 

 furnace door is to open, so as to keep the smoke and dust 

 from the house. The furnace is placed in a pit four feet 

 below the level of the house, and is made of brick, with 

 7 



