BOOK VIII.

277

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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 —Middlepart of upper chamber. H —The other two compartments. I—Divisions of theLOWER CHAMBER. K —MIDDLE WALL. L—POTS WHICH ARE FILLED WITH ORE. M LlDS

OF SAME POTS. N—GRATING.