BRITISH MODES OF CULTIVATING 



in this furnace in severe weather, not only adds to 

 the heat of the house by its own power, but by 

 increasing the draught, or rate of burning, of the 

 fire in the other furnace. 



In addition to the fire heat, a steam apparatus 

 has been lately erected, and the tubes conducted 

 round the houses on the tops of the flues ( fig. 15. 

 d, e ) ; this is found to give a great command of 

 heat, and also to admit of filling the house with va- 

 pour at pleasure. The height of the house from 

 the ground to the top of the back wall, is only nine 

 feet (fig. 170? tae rafters of the icof are placed 



about four feet apart, centre from centre ; or about 

 twenty-four sashes are given to every hundred 

 feet ; the front sashes ( a ), ' are only eighteen 

 inches high, and slide past each other ; the middle 

 end sash ( b ), also slides ; the sill of the door ( c ), 

 and the back path, or border, are on a level with 

 the outer surface of the ground, to admit the easy 

 wheeling in of tan, &c. ; the front border ( d ), is 

 raised considerably above it, on account of the 

 wet bottom ; the back sheds are low and neat, and 

 the furnaces sunk three feet below the surface 



