Includes: a paper on lead-zinc mining; report of the Ministry of Fuel and Power mineral development committee; drafts of a paper by LSA on Britain's neglected mineral wealth, with correspondence with individuals including Sir William Larke, Sir [James] Arthur Salter, Minister of Materials and Philip Cunliffe-Lister, Chancellor of the Duchy of Lancaster [earlier Philip Lloyd-Greame, later 1st Lord Swinton]; paper by Alexander Fleck [Deputy Chairman of Imperial Chemical Industries Limited] on potassium deposits in Yorkshire; post-war recommendations of the Non-ferrous Metallic Ores Committee.