Trouble with pyrite

 Fred Clouter (UK) On Wednesday, 26 April 1882, the Queenborough Chemical and Copperas Works were auctioned off, heralding the demise of the copperas industry on the Isle of Sheppey. Green copperas was used to make sulphuric acid or vitriol, chemical manures and dye stuffs. “Being in Queenborough Castle in the…


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