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1949 · Best.-Nr. 012012 — London: The Institution of Post Office Electrical Engineers. Supplement included. Short tear along spine Very Good. Includes articles about the London-Birmingham television cable a speech spectrum analyser post office phototelegraph service to Europe British Telephone Technical Development Committee vacuum technique poisoning effects in oxide-cathode valves pneumatic tubes tungsten carbide tipped tools mechanical trunk fee accounting Part 1--principles of punched card accounting electronic regenerative repeater for 7 1/2-unit start-stop tlegraph signals and a miniature audio-frequency amplifier. Early computer and television articles. . Very Good. Stiff Wrappers Paperbound. First Edition. 1949. The Institution of Post Office Electrical Engineers unknown