Scope and Contents The papers include: diaries and engagement books; personal and general correspondence; early scientific papers and laboratory notebooks; papers and correspondence relating to Balliol College; papers relating to Hartley's chemical warfare work in the First World War; papers of the Axis Oil Committees, concerned with the problem of oil supplies to the Axis in the Second World War; the FIDO papers, from a committee headed by Hartley on Fog Investigation Dispersal Operations, also during the...