Correspondence from R.A. Watson-Watt to Edward Appleton, 1930 and 1934

Correspondence from Robert Alexander Watson-Watt to Edward Appleton, 1934. The correspondence contains a very critical comment on Appleton's and Chapman's paper, 'The lightning flash as source of an atmospheric’, Nature, 134, and referring to previous work and publication by Appleton, Watson-Walt and Herd ('On the nature of atmospherics', Proceedings of the Royal Society, 111). The material includes a press-cutting of an article by Watson-Watt on atmospherics, dated 1930.