Referee's report by Alfred Fowler, on a paper 'Hyperfine structure and nuclear moments of aluminium' by Derek Ainslie Jackson and Heinrich Gerhard Kuhn Sectional Committee: Physics Recommended for publication in the 'Proceedings of the Royal Society of London'. Careful attention should be paid to sources of error in the measurements, but the interpretaion of the results can be accepted with confidence. The description and illustration of the apparatus should be made more intelligible. [Published in the 'Proceedings of the Royal Society of London'] Endorsed on verso as received 24 August 1937. [August 1937]