Description of a Pine Pit, $c. 



Plate VI. 



Fig. 1. End section, through the chimney, 

 a Back ventilator, when open, 

 b Dung pit. 

 c Drain. 



d Apertures to admit the heat from the dung, 

 e Furnace, 

 f Level of the ground. 

 Fig. 2. End section of the flue. 



a Front ventilator, when open. 



b Foot of the rafter resting on the stone cover. 



