Referee's report by Richard Whiddington, on a paper 'Investigations on the preliminary stages of spark formation in various gases by the use of the Wilson chamber' by U Nakaya and F Yamasaki Sectional Committee: Physics Recommended for publication in the 'Proceedings of the Royal Society of London'. If printing cost is an issue, the paper could be reduced in length without loss of value. [Published in the 'Proceedings of the Royal Society of London'] Endorsed on verso as received 9 October 1935. [October 1935]