No. 1 of the year 1939. Civil Specification Memorandum No. 21 Civil Specifications No. 19 (Accumulator Cutouts or Reverse Current Relays), No. 20 (Absolute Atmospheric Pressure Gauges), and No. 21 (Voltage Regulators) have now been issued and can be purchased, price 6d. net per copy or 7d. post free, either direct from His Majesty's Stationery Office at any of the following addresses:—York House, Kingsway, London, W.C.2; 120, George Street, Edinburgh, 2; 26, York Street, Manchester, 1; 1, St. Andrew's Crescent, Cardiff; 80, Chichester Street, Belfast; or through any bookseller.
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