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National Geographic : 1947 Dec
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© National Geographic Society X Ektachrome by J.Baylor Roberts That Yellow Cliff Is Solid Sulphur; the Power Shovel Loads It on a Belt Conveyor for Transfer toRiver Barges Hot water and steam, forced down deep holes, bring sulphur to the surface at Freeport Sulphur Company's GrandeEcaille deposits, downriver from New Orleans.
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