Aberdeen City: Warren Spring Laboratory Reports "The Investigation of Air Pollution Directory Part 2 Deposit Gauge and Lead Dioxide Candle" Sites used from the beginning of the Co-opeartive Investigation up to March 1980 or March 1982. Deposit gauge measures deposits of grit and dust, lead dioxide is monthly observations of sulphation rates (explained in preface). Marked as received by the City Environmental Health Department. 1980-1982