BOOK VIII. 



277 



A IRON PLATES FULL OF HOLES. B WALLS. C PLATE ON WHICH ORE is PLACED. 

 D BURNING CHARCOAL PLACED ON THE ORE. E POTS. F FURNACE. G MIDDLE 



PART OF UPPER CHAMBER. H THE OTHER TWO COMPARTMENTS. I DIVISIONS OF THE 

 LOWER CHAMBER. K MIDDLE WALL. L POTS WHICH ARE FILLED WITH ORE. M LlDS 



OF SAME POTS. N GRATING. 



