Records of the Balfour Stewart Auroral Laboratory and British Astronomical Association Aurora Section The collection comprises visual, magnetic and radio observations of aurora, summaries of these observations, and records of non-occurences. Whilst the aurora borealis is the main focus of these studies, there are small amounts of data concerning auroral activity in the Southern Hemisphere. The collection covers key meteorological years: the International Polar Year (1932 - 1933), the International Geophysical Year (1957 - 1958), the International Year of Geophysical Co-operation (1959) and the International Quiet Sun Year (1964 - 1965). Noctlilucent cloud observations from 1964 also form part of this collection, and there are a variety of newsletters and comprehensive studies discussing aurorae and noctilucent clouds. Photographs of aurorae form a significant part of the collection. 1931-2014