Correspondence from W.J.G. Beynon to Edward Appleton, 1947-1949

Correspondence from W.J.G. Beynon to Edward Appleton, dated 1947-1949. The material mainly relates to research and collaborative publications, but it includes some from the U.R.S.I. [Union Radio-Scientifique Internationale]. The correspondence relates to Appleton’s and Beynon's note ‘Lunar oscillations in the D-layer’, Nature, 164, 1949, Beynon's 'Note on Focussing Effects in the horizontal plane in Oblique Incidence Transmission', 'Atmospheric Effects in Short and Medium Radio Wave Propagation', and it includes two drafts: 'The Reflection of Radio Waves from the Ionosphere at Oblique Incidence' (by Beynon), and ‘Astigmatic Reflection by the Ionosphere' (by Appleton and Beynon). Also included is a letter and draft paper by D.F. Martin.