Jan,] 



THE FORCING GARDEN. 



645 



side of the house is built, make a floor or ceiHng over it as 

 high as the top of the outside walls of boards, one inch thick, 

 and plaster it on the upper side (ee) with road sand, well 



wrought together, one inch thick, (this will be found superior 

 to lime), leaving square trunks (/) in the ceiling, nine inches 

 in diameter, up the middle of the house, at six feet distant 

 fe'om each other, with slides {s) under them to admit and let 

 off air when necessary. This being done, erect two single 

 brick-walls {v v), each five bricks high, at the distance of 

 five feet and a half from the outside walls, to hold up the 

 sides of the floor-beds {a a), and form one side of the air- 

 flues (u w), leaving three feet up the middle {I x I) of the 

 house for the flues. Upon these walls {v v) lay planks, 

 four and a half inches wide, and three inches thick, in which 

 to mortise the standards (/r) which support the shelves. 

 These standards should be three and a half inches square, and 

 placed four feet six inches asunder, and fastened at the top {/c Z) 

 through the ceiling. When the standards are set up, fix the 

 cross-bearers (1 w, 1 7i) that are to support the shelves (o o), 

 mortising one end of each into the standards, the other into 

 the walls (n). The first set of bearers should be two feet from 

 the floor, and each succeeding set two feet from that below it. 



