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Typed in black ink on off-white paper. A Powell Duffryn Technical Services headed memo, printed in blue ink. Signed by D.J. Thomas in blue ink. A memo regarding the boiler temperatures at Bargoed and Middle Duffryn Power Stations. From D.J.Thomas to A.Z.C. James. Dated 30th October, 1952. Loose within pink/peach card file with other documents relating to Middle Duffryn and Bargoed High Pressure Station.
