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TIN-STREAMING
scarce; and it gave way to a furnace of better construction, where the receiver was circular, and a draught-hole was at the bottom. One of these has
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Smelting Ore. (After Agricola.)
been dug out and carefully examined at Deep Swincombe.
It consists of a single chamber, 18 feet by 11 feet, rudely constructed of masses of granite resting on
