Referee's report by Ralph Howard Fowler, on a paper 'The hyperfine structure of the resonance lines of potassium' by Derek Ainslie Jackson and H Kuhn Sectional Committee: Physics Recommended for publication in the 'Proceedings of the Royal Society of London'. Doubts if he is the correct referee for the paper. Suggests the experimental description could be shortened. Suggests another referee with experimental experience be sought, such as Alfred Fowler. [Published in the 'Proceedings of the Royal Society of London'] Endorsed on verso as received 26 September 1934. [September 1934]