IRON 



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opening through which an iron bar may be introduced to more the objects on the plate 

 m, or clean the arched passage leading from this part to the stack o, to which, at the 



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1286 



bottom, is often attached a large chamber destined to intercept sparks. There is an 

 ash-pit p, from which the ashes may be removed through an opening at p l , which is 

 closed with a cast-iron door. 



All being in working order, and the ball obtained in the previous heat removed, 

 charcoal-dust is put on the fore-side, and the hearth is spread with clean charcoal. 

 The pig-iron, which is in plates 2 inches or 3 inches thick, and has been previously 

 heated on the plate in the flue, is transferred to the hearth, the charge being 200 Ibs. 

 Fresh charcoal is added and the blast turned on, when, in about half an hour, the 



