At the suggestion of Jean Meyer, who was head of research at Metz & Cie, Émile Metz managed to convince his father to buy the rights to the Thomas-Gilchrist procedure for dephosophorising Minette (low-quality iron ore found in the south of Luxembourg).
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He communicated his theory to his cousin, Percy Gilchrist, who was a chemist at the former Blaenavon Ironworks, Blaenavon in Wales, and experiments were made which proved satisfactory.