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Amgueddfa Cymru – Museum Wales
Three pages stapled together. Pre-printed report sheets: black print on cream paper. Details handwritten in pencil. Sheets containing data relating to blast furnaces. Contains data relating to the average analysis of ore mixture, coke & fluxes, and slag forming materials charged. The report sheets are dated June 14th 1959, December 30th, 1958 plus one undated report.
