Sulphur Distilled from Ore in Spouted Earthenware Pots (Agricola, 1556)

Agricola's 16th-century sulphur works: earthy sulphur ore sealed in two-foot earthenware pots over a three-storey furnace, the vapour led by long spouts into a cool spoutless pot where it condenses like melted wax and runs out to be cast in cakes.

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Assay Cupels From Washed Beech and Bone Ash, Rammed in a Brass Mould (Agricola, De Re Metallica, 1556)

na Peter

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