THE PINE APPLE. 



141 



ply of heat in very severe weather. The first ( a ), 

 proceeds directly to the front corner ( b ), thence 

 along the front to the opposite end (c), then along 

 the back of the pit ( d, e ), passing under the back 

 path, or border, and terminating in a chimney (^/) 

 beside the furnace. 



The other furnace is placed at the opposite end 

 of the house ( g ) ; has a short flue under the back 

 path, which conducts it to the back course of the 

 principal flue (at cT), which it joins, and the smoke 

 of the two fires moves in the same tunnel, ( from d 

 to e} and passes out by the same chimney. When 

 this second furnace is not in use, its connection 

 with the flue of the first is cut off by- a damper at 

 the point of junction ( d ). A very small fire made 



