206 FURNACES AND DRYING PANS. ([Cuar. XI. 
is now the duty of one individual to light the little 
fire at the mouth of the flue, and to regulate it as 
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Furnaces and Drying Pans. 
nicely as possible. The pans become hot very 
soon after the warm air has begun to circulate in 
the flue beneath them. A quantity of leaves, from a 
sieve or basket, are now thrown into the pans, and 
turned over, shaken up, and kept in motion by 
men and women stationed there for this purpose. 
The leaves are immediately affected by the heat. 
They begin to crack, and become quite moist with 
the vapour or sap which they give out on the 
application of the heat. This part of the process 
