Lille, France/lille800

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This is the manufactory. This site once had an extensive sulfuric acid complex; it was completely destroyed during German advances in World War I. The thallium was in the remaining sludge after sulfuric acid had been produced from Belgian pyrites . The ores containing the largest amount of thallium came from Theux, Belgium, 195 km east. {LINK: Theux100-castle}