This fonds contains reports, correspondence, minutes, blue prints, and a visitor's book regarding the planning for and opening of the Betatron Project. Also included are a CBC film and a four magnetic tapes regarding the opening of the Linear Accelerator. Another subgroup includes meteorological records kept by the department between 1900 and 1968. A third subgroup includes the log books of Dr. Balfour Currie regarding his research of auroras during the Second International Polar Year (1932-1933).