Letter from Edward Victor Appleton, on a paper 'On the propagation of electromagnetic waves through the atmosphere' by B K Banerjea to Alfred Charles Glyn Egerton He is glad that the paper has been accepted, as it clears up a lot of differences. The date of one of the references should be changed - this is a common error in papers about this subject. [Published in Proceedings of the Royal Society A, 1947]. Endorsed on recto as received 2 August 1946. 31 July 1946