This sub-series consists of 27 files containing material relating to Edward Appleton’s research into Radar [Radio Detection And Ranging]. Much of this consists of reports and information, some of it was sent to Appleton to document research in progress or for various wartime projects, and some was sent to or assembled by him as documentation for the historical development of radar. The material consequently includes some interesting reports on wartime research in Britain and elsewhere, and also copies of patent applications before and during the war. There is some related correspondence and material referring to the hearings of the Royal Commission on Awards to Inventors (see especially Coll-37/C.272). The material is presented as a chronological sequence.