( Hi ) 



liard wood, are beft. When the fire burns hf- 

 ficicntly ftrong, clay nnufl: be carefully and gra- 

 dually laid on it, taking care not to f liother it. 

 When the clay becomes ignited, lay on more, 

 and it v;ill of itfelf continue to burn without 

 any additional fuel. A free circulation of air 

 being abfolutely neceffary, the fire fliould face 

 the wind : and it muft be attended night and 

 day, as the fun or rain would extinguifh it. 



The expence, at prefent, of burning fifty 

 -cart-loads of clay, which is fufficient for one 

 acre, is as follows : 



A tun of coals £* ^ ^S © 

 Wages of a man, fourteen 



days, at is, per day i 8 o 



Cartage after it is burnt 158 



Total expences £- 3 ^ S 



Where the clay is prepared, women and 

 children, with a man to fuperintend them, may 

 be employed to light and keep up the fires. — 

 Thus very large quantities might be burnt at 

 a trifling expence. 



As 



