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CHARCOAL MANUFACTURE. 



be closed in their turn, and others made at Gr, H, I and J. 

 Shortly after this is done, it will be perceived that smoke is pro- 

 ceeding uniformly from every crevice, when all air-holes at the 



Fig. 14. Horizontal Section of Kiln, 

 bottom must be closed. The whole kiln will then fall in, and 

 assume something of the following appearance (fig. 15) at the 

 end of 36 hours. 



Fig. 15. 



Earth enough must then be thrown on with shovels to extin- 

 guish all smoke. At the end of 36 hours more, the charcoal may 

 be raked out. A few buckets of water should be in readiness, if 

 required, to put out the sparks of fire which may remain. 



Great care must be taken to stop every fissure in the casing ; 

 and if, from bad management, the heap settles, and the casing 

 falls in at any part, the cavity must be filled up with green wood 



