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Amgueddfa Cymru
Full title: 'Description of the Testing Plant for the Conversion of Non-Magnetic Ores into Concentrates on the Principle of Antibolaget Ferriconcentrat for a Throughput of 25-tons of Raw Ore per 24-Hours and as Shewn on Plans Nos. 25-26 & 27.' A four page report, a four page specification and a plan contained with a grey card file of the Coppee Company (Great Britain) Limited. Report and Specification are typed in black ink on white paper. Also contained loose within the file is a technical drawing, blue dyeline on cream paper. Dated 1930.
